├── .gitignore ├── DatasetHelper.pas ├── LICENSE └── README.md /.gitignore: -------------------------------------------------------------------------------- 1 | # Uncomment these types if you want even more clean repository. But be careful. 2 | # It can make harm to an existing project source. Read explanations below. 3 | # 4 | # Resource files are binaries containing manifest, project icon and version info. 5 | # They can not be viewed as text or compared by diff-tools. Consider replacing them with .rc files. 6 | #*.res 7 | # 8 | # Type library file (binary). In old Delphi versions it should be stored. 9 | # Since Delphi 2009 it is produced from .ridl file and can safely be ignored. 10 | #*.tlb 11 | # 12 | # Diagram Portfolio file. Used by the diagram editor up to Delphi 7. 13 | # Uncomment this if you are not using diagrams or use newer Delphi version. 14 | #*.ddp 15 | # 16 | # Visual LiveBindings file. Added in Delphi XE2. 17 | # Uncomment this if you are not using LiveBindings Designer. 18 | #*.vlb 19 | # 20 | # Deployment Manager configuration file for your project. Added in Delphi XE2. 21 | # Uncomment this if it is not mobile development and you do not use remote debug feature. 22 | #*.deployproj 23 | # 24 | # C++ object files produced when C/C++ Output file generation is configured. 25 | # Uncomment this if you are not using external objects (zlib library for example). 26 | #*.obj 27 | # 28 | 29 | # Delphi compiler-generated binaries (safe to delete) 30 | *.exe 31 | *.dll 32 | *.bpl 33 | *.bpi 34 | *.dcp 35 | *.so 36 | *.apk 37 | *.drc 38 | *.map 39 | *.dres 40 | *.rsm 41 | *.tds 42 | *.dcu 43 | *.lib 44 | *.a 45 | *.o 46 | *.ocx 47 | 48 | # Delphi autogenerated files (duplicated info) 49 | *.cfg 50 | *.hpp 51 | *Resource.rc 52 | 53 | # Delphi local files (user-specific info) 54 | *.local 55 | *.identcache 56 | *.projdata 57 | *.tvsconfig 58 | *.dsk 59 | 60 | # Delphi history and backups 61 | __history/ 62 | __recovery/ 63 | *.~* 64 | 65 | # Castalia statistics file (since XE7 Castalia is distributed with Delphi) 66 | *.stat 67 | 68 | # Boss dependency manager vendor folder https://github.com/HashLoad/boss 69 | modules/ 70 | TestProject/ 71 | -------------------------------------------------------------------------------- /DatasetHelper.pas: -------------------------------------------------------------------------------- 1 | {***************************************************************************} 2 | { } 3 | { } 4 | { Copyright (C) Tiago Rodrigues } 5 | { } 6 | { https://github.com/kline777 } 7 | { } 8 | { } 9 | {***************************************************************************} 10 | { } 11 | { Licensed under the Apache License, Version 2.0 (the "License"); } 12 | { you may not use this file except in compliance with the License. } 13 | { You may obtain a copy of the License at } 14 | { } 15 | { http://www.apache.org/licenses/LICENSE-2.0 } 16 | { } 17 | { Unless required by applicable law or agreed to in writing, software } 18 | { distributed under the License is distributed on an "AS IS" BASIS, } 19 | { WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. } 20 | { See the License for the specific language governing permissions and } 21 | { limitations under the License. } 22 | { } 23 | {***************************************************************************} 24 | 25 | unit DatasetHelper; 26 | 27 | interface 28 | 29 | uses sysutils, data.db, system.generics.collections, ioutils; 30 | 31 | type 32 | TDataStringArray = array of string; 33 | TDataFieldArray = array of TField; 34 | TDataVariantArray = array of Variant; 35 | 36 | /// 37 | /// Interface for dataset helper functions 38 | /// 39 | 40 | IDatasetRecord = interface 41 | /// 42 | /// Gets the rec of the current record 43 | /// 44 | function RecNo(): integer; 45 | /// 46 | /// Gets the current field value of the current record 47 | /// 48 | function GetValue(AFieldName: string): Variant; overload; 49 | function GetValue(AField: TField): Variant; overload; 50 | /// 51 | /// Sets a new value on a field of the current selected rows 52 | /// 53 | function SetValue(AFieldName: string; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecord; overload; 54 | function SetValue(AField: TField; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecord; overload; 55 | function SetValue(AFieldNames: TDataStringArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 56 | : IDatasetRecord; overload; 57 | function SetValue(AFields: TDataFieldArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 58 | : IDatasetRecord; overload; 59 | /// 60 | /// Execute method in current record 61 | /// 62 | function Execute(AProc: TProc): boolean; 63 | /// 64 | /// Deletes the current selected rows 65 | /// 66 | function Delete(): boolean; 67 | /// 68 | /// Returns array with all values from current row 69 | /// 70 | function AsArray(AFieldNames: TDataStringArray = []): TDataVariantArray; 71 | /// 72 | /// Copy values from array to current row 73 | /// 74 | procedure SetValues(AValues: TDataVariantArray; APostChanges: boolean = true); 75 | /// 76 | /// Creates a new line with the values of the selected line 77 | /// 78 | function CreateCopyRecord(AOverrideFields: TDataStringArray = []; AOverrideValues: TDataVariantArray = []; 79 | AIgnoreFields: TDataStringArray = []; APostChanges: boolean = true): boolean; 80 | /// 81 | /// Returns array with all values from current row 82 | /// 83 | function CreateCopyRecordToDataset(ATargetDataset: TDataset; AOverrideFields: TDataStringArray = []; 84 | AOverrideValues: TDataVariantArray = []; AIgnoreFields: TDataStringArray = []; APostChanges: boolean = true): boolean; 85 | end; 86 | 87 | IDatasetRecList = interface 88 | /// 89 | /// Gets the minimum value of a field 90 | /// If field is not a number type, an exception is thrown 91 | /// 92 | function Min(AFieldName: string): Variant; overload; 93 | function Min(AField: TField): Variant; overload; 94 | /// 95 | /// Gets the maximum value of a field 96 | /// If field is not a number type, an exception is thrown 97 | /// 98 | function Max(AFieldName: string): Variant; overload; 99 | function Max(AField: TField): Variant; overload; 100 | /// 101 | /// Gets the sum of values of a field 102 | /// If field is not a number type, an exception is thrown 103 | /// 104 | function Sum(AFieldName: string): integer; overload; 105 | function Sum(AField: TField): integer; overload; 106 | /// 107 | /// Gets the average of values of a field 108 | /// If field is not a number type, an exception is thrown 109 | /// 110 | function Avg(AFieldName: string): Variant; overload; 111 | function Avg(AField: TField): Variant; overload; 112 | /// 113 | /// Gets the count of selected records 114 | /// 115 | function Count(): integer; 116 | /// 117 | /// Returns a group of rows that match the given expression 118 | /// 119 | function Select(AFieldName: string; AValue: Variant): IDatasetRecList; overload; 120 | function Select(AField: TField; AValue: Variant): IDatasetRecList; overload; 121 | /// 122 | /// Returns a group of rows that doesnt match the given expression 123 | /// 124 | function SelectNotEqual(AFieldName: string; AValue: Variant): IDatasetRecList; overload; 125 | function SelectNotEqual(AField: TField; AValue: Variant): IDatasetRecList; overload; 126 | /// 127 | /// Returns a group of rows that match the given expression 128 | /// 129 | function SelectIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; overload; 130 | function SelectIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; overload; 131 | /// 132 | /// Returns a group of rows that doesnt match the given expression 133 | /// 134 | function SelectNotIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; overload; 135 | function SelectNotIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; overload; 136 | /// 137 | /// Returns the first record of the selection 138 | /// 139 | function First(): IDatasetRecord; 140 | /// 141 | /// Returns the Last record of the selection 142 | /// 143 | function Last(): IDatasetRecord; 144 | /// 145 | /// Sets a new value on a field of the current selected rows 146 | /// 147 | function SetValue(AFieldName: string; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecList; overload; 148 | function SetValue(AField: TField; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecList; overload; 149 | function SetValue(AFieldNames: TDataStringArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 150 | : IDatasetRecList; overload; 151 | function SetValue(AFields: TDataFieldArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 152 | : IDatasetRecList; overload; 153 | /// 154 | /// Loop current result list 155 | /// 156 | procedure ForEach(AProc: TProc); 157 | procedure ForEachReversed(AProc: TProc); 158 | /// 159 | /// Deletes the current selected rows 160 | /// 161 | function Delete(): integer; 162 | /// 163 | /// Returns current selected rows as a list with array with all values 164 | /// 165 | function AsList(AFieldNames: TDataStringArray = []): TList; 166 | /// 167 | /// Returns current selected rows as a array with array with all values 168 | /// 169 | function AsArray(AFieldNames: TDataStringArray = []): TArray; 170 | end; 171 | 172 | /// 173 | /// Class that implements dataset single record helper functions 174 | /// 175 | TDatasetRecord = class(TInterfacedObject, IDatasetRecord) 176 | private 177 | FDataset: TDataset; 178 | FIndex: integer; 179 | /// 180 | /// Moves to record, edits, executes function and return to current record 181 | /// 182 | procedure MoveToRecordEditAndReturn(APostChanges: boolean; AProc: TProc); 183 | /// 184 | /// Moves to record, executes function and return to current record 185 | /// 186 | procedure MoveToRecordAndReturn(AProc: TProc); 187 | constructor Create(ADataset: TDataset; AIndex: integer); 188 | public 189 | /// 190 | /// Returns array with all values from current row 191 | /// 192 | function AsArray(AFieldNames: TDataStringArray = []): TDataVariantArray; 193 | /// 194 | /// Sets a new value on a field of the current selected rows 195 | /// 196 | function SetValue(AFieldName: string; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecord; overload; 197 | function SetValue(AField: TField; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecord; overload; 198 | function SetValue(AFieldNames: TDataStringArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 199 | : IDatasetRecord; overload; 200 | function SetValue(AFields: TDataFieldArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 201 | : IDatasetRecord; overload; 202 | /// 203 | /// Copy values from array to current row 204 | /// 205 | procedure SetValues(AValues: TDataVariantArray; APostChanges: boolean = true); 206 | /// 207 | /// Gets the current field value of the current record 208 | /// 209 | function GetValue(AFieldName: string): Variant; overload; 210 | function GetValue(AField: TField): Variant; overload; 211 | /// 212 | /// Creates a new line with the values of the selected line 213 | /// 214 | function CreateCopyRecord(AOverrideFields: TDataStringArray = []; AOverrideValues: TDataVariantArray = []; 215 | AIgnoreFields: TDataStringArray = []; APostChanges: boolean = true): boolean; 216 | /// 217 | /// Returns array with all values from current row 218 | /// 219 | function CreateCopyRecordToDataset(ATargetDataset: TDataset; AOverrideFields: TDataStringArray = []; 220 | AOverrideValues: TDataVariantArray = []; AIgnoreFields: TDataStringArray = []; APostChanges: boolean = true): boolean; 221 | /// 222 | /// Gets the rec of the first record 223 | /// 224 | function RecNo(): integer; 225 | /// 226 | /// Execute method in current record 227 | /// 228 | function Execute(AProc: TProc): boolean; 229 | /// 230 | /// Deletes the current selected rows 231 | /// 232 | function Delete(): boolean; 233 | end; 234 | 235 | /// 236 | /// Class that implements dataset helper functions 237 | /// 238 | TDatasetRecList = class(TInterfacedObject, IDatasetRecList) 239 | private 240 | FDataset: TDataset; 241 | FList: TList; 242 | FAll: boolean; 243 | public 244 | // Interface functions 245 | /// 246 | /// Gets the minimum value of a field 247 | /// If field is not a number type, an exception is thrown 248 | /// 249 | function Min(AFieldName: string): Variant; overload; 250 | function Min(AField: TField): Variant; overload; 251 | /// 252 | /// Gets the maximum value of a field 253 | /// If field is not a number type, an exception is thrown 254 | /// 255 | function Max(AFieldName: string): Variant; overload; 256 | function Max(AField: TField): Variant; overload; 257 | /// 258 | /// Gets the sum of values of a field 259 | /// If field is not a number type, an exception is thrown 260 | /// 261 | function Sum(AFieldName: string): integer; overload; 262 | function Sum(AField: TField): integer; overload; 263 | /// 264 | /// Gets the average of values of a field 265 | /// If field is not a number type, an exception is thrown 266 | /// 267 | function Avg(AFieldName: string): Variant; overload; 268 | function Avg(AField: TField): Variant; overload; 269 | /// 270 | /// Gets the count of selected records 271 | /// 272 | function Count(): integer; 273 | /// 274 | /// Sets a new value on a field of the current selected rows 275 | /// 276 | function SetValue(AFieldName: string; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecList; overload; 277 | function SetValue(AField: TField; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecList; overload; 278 | function SetValue(AFieldNames: TDataStringArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 279 | : IDatasetRecList; overload; 280 | function SetValue(AFields: TDataFieldArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 281 | : IDatasetRecList; overload; 282 | /// 283 | /// Returns a group of rows that match the given expression 284 | /// 285 | function Select(AFieldName: string; AValue: Variant): IDatasetRecList; overload; 286 | function Select(AField: TField; AValue: Variant): IDatasetRecList; overload; 287 | /// 288 | /// Returns a group of rows that doesnt match the given expression 289 | /// 290 | function SelectNotEqual(AFieldName: string; AValue: Variant): IDatasetRecList; overload; 291 | function SelectNotEqual(AField: TField; AValue: Variant): IDatasetRecList; overload; 292 | /// 293 | /// Returns a group of rows that match the given expression 294 | /// 295 | function SelectIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; overload; 296 | function SelectIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; overload; 297 | /// 298 | /// Returns a group of rows that doesnt match the given expression 299 | /// 300 | function SelectNotIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; overload; 301 | function SelectNotIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; overload; 302 | /// 303 | /// Returns the first record of the selection 304 | /// 305 | function First(): IDatasetRecord; 306 | /// 307 | /// Returns the Last record of the selection 308 | /// 309 | function Last(): IDatasetRecord; 310 | /// 311 | /// Loop current result list 312 | /// 313 | procedure ForEach(AProc: TProc); 314 | procedure ForEachReversed(AProc: TProc); 315 | /// 316 | /// Deletes the current selected rows 317 | /// 318 | function Delete(): integer; 319 | /// 320 | /// Returns current selected rows as a list with array with all values 321 | /// 322 | function AsList(AFieldNames: TDataStringArray = []): TList; 323 | /// 324 | /// Returns current selected rows as a array with array with all values 325 | /// 326 | function AsArray(AFieldNames: TDataStringArray = []): TArray; 327 | constructor Create(ADataset: TDataset); 328 | destructor Destroy(); override; 329 | end; 330 | 331 | /// 332 | /// Dataset helper taht implements first selectors 333 | /// 334 | TDatasetHelper = class helper for data.db.TDataset 335 | /// 336 | /// Returns a group of rows that match the given expression 337 | /// 338 | function Select(AFieldName: string; AValue: Variant): IDatasetRecList; overload; 339 | function Select(AField: TField; AValue: Variant): IDatasetRecList; overload; 340 | /// 341 | /// Returns a group of rows that doesnt match the given expression 342 | /// 343 | function SelectNotEqual(AFieldName: string; AValue: Variant): IDatasetRecList; overload; 344 | function SelectNotEqual(AField: TField; AValue: Variant): IDatasetRecList; overload; 345 | /// 346 | /// Returns a group of rows that match the given expression 347 | /// 348 | function SelectIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; overload; 349 | function SelectIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; overload; 350 | /// 351 | /// Returns a group of rows that doesnt match the given expression 352 | /// 353 | function SelectNotIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; overload; 354 | function SelectNotIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; overload; 355 | /// 356 | /// Returns all dataset rows 357 | /// 358 | function All: IDatasetRecList; 359 | /// 360 | /// Returns current dataset row 361 | /// 362 | function Current: IDatasetRecord; 363 | end; 364 | 365 | implementation 366 | 367 | uses variants, StrUtils; 368 | 369 | { TResultList } 370 | /// 371 | /// Gets the count of selected records 372 | /// 373 | function TDatasetRecList.Count: integer; 374 | begin 375 | if FAll then 376 | Result := FDataset.RecordCount 377 | else 378 | Result := FList.Count; 379 | end; 380 | 381 | constructor TDatasetRecList.Create(ADataset: TDataset); 382 | begin 383 | FDataset := ADataset; 384 | FList := TList.Create; 385 | FAll := true; 386 | end; 387 | 388 | function TDatasetRecList.Delete: integer; 389 | var 390 | LIndex: integer; 391 | LResult: integer; 392 | begin 393 | LResult := 0; 394 | FDataset.DisableControls; 395 | try 396 | if FAll then 397 | begin 398 | // Loop entire dataset 399 | FDataset.Last; 400 | while not FDataset.bof do 401 | begin 402 | FDataset.Delete; 403 | inc(LResult); 404 | end; 405 | end 406 | else 407 | // Lopp current result list 408 | for LIndex := FList.Count - 1 downto 0 do 409 | begin 410 | FDataset.RecNo := FList[LIndex]; 411 | FDataset.Delete; 412 | inc(LResult); 413 | end; 414 | finally 415 | FDataset.EnableControls; 416 | Result := LResult; 417 | end; 418 | end; 419 | 420 | destructor TDatasetRecList.Destroy; 421 | begin 422 | FList.Destroy; 423 | inherited; 424 | end; 425 | 426 | /// 427 | /// Loop current result list 428 | /// 429 | procedure TDatasetRecList.ForEach(AProc: TProc); 430 | var 431 | LIndex: integer; 432 | begin 433 | FDataset.DisableControls; 434 | try 435 | if FAll then 436 | begin 437 | // Loop entire dataset 438 | FDataset.First; 439 | while not FDataset.eof do 440 | begin 441 | AProc(); 442 | FDataset.Next; 443 | end; 444 | end 445 | else 446 | // Lopp current result list 447 | for LIndex in FList do 448 | begin 449 | FDataset.RecNo := LIndex; 450 | AProc(); 451 | end; 452 | finally 453 | FDataset.EnableControls; 454 | end; 455 | end; 456 | 457 | /// 458 | /// Loop current result list 459 | /// 460 | procedure TDatasetRecList.ForEachReversed(AProc: TProc); 461 | var 462 | LIndex: integer; 463 | begin 464 | FDataset.DisableControls; 465 | try 466 | if FAll then 467 | begin 468 | // Loop entire dataset 469 | FDataset.Last; 470 | while not FDataset.bof do 471 | begin 472 | AProc(); 473 | FDataset.Prior; 474 | end; 475 | end 476 | else 477 | // Lopp current result list 478 | for LIndex := FList.Count - 1 downto 0 do 479 | begin 480 | FDataset.RecNo := FList[LIndex]; 481 | AProc(); 482 | end; 483 | finally 484 | FDataset.EnableControls; 485 | end; 486 | end; 487 | 488 | /// 489 | /// Returns the first record of the selection 490 | /// 491 | function TDatasetRecList.First: IDatasetRecord; 492 | begin 493 | if FAll then 494 | Result := TDatasetRecord.Create(FDataset, 1) 495 | else if FList.Count > 0 then 496 | Result := TDatasetRecord.Create(FDataset, FList.First) 497 | else 498 | Result := TDatasetRecord.Create(nil, -1); 499 | end; 500 | 501 | /// 502 | /// Returns the Last record of the selection 503 | /// 504 | function TDatasetRecList.Last: IDatasetRecord; 505 | begin 506 | if FAll then 507 | Result := TDatasetRecord.Create(FDataset, FDataset.RecordCount) 508 | else if FList.Count > 0 then 509 | Result := TDatasetRecord.Create(FDataset, FList.Last) 510 | else 511 | Result := TDatasetRecord.Create(nil, -1); 512 | end; 513 | 514 | /// 515 | /// Gets the average of values of a field 516 | /// If field is not a number type, an exception is thrown 517 | /// 518 | function TDatasetRecList.Avg(AFieldName: string): Variant; 519 | begin 520 | Result := Avg(FDataset.FieldByName(AFieldName)); 521 | end; 522 | 523 | /// 524 | /// Gets the average of values of a field 525 | /// If field is not a number type, an exception is thrown 526 | /// 527 | function TDatasetRecList.AsList(AFieldNames: TDataStringArray): TList; 528 | var 529 | LList: TList; 530 | begin 531 | LList := TList.Create; 532 | ForEach( 533 | procedure 534 | begin 535 | LList.Add(FDataset.Current.AsArray(AFieldNames)); 536 | end); 537 | 538 | Result := LList; 539 | end; 540 | 541 | /// 542 | /// Returns current selected rows as a array with array with all values 543 | /// 544 | function TDatasetRecList.AsArray(AFieldNames: TDataStringArray = []): TArray; 545 | var 546 | LArray: TArray; 547 | LIndex: integer; 548 | begin 549 | Setlength(LArray, Count); 550 | LIndex := 0; 551 | ForEach( 552 | procedure 553 | begin 554 | LArray[LIndex] := FDataset.Current.AsArray(AFieldNames); 555 | inc(LIndex); 556 | end); 557 | 558 | Result := LArray; 559 | end; 560 | 561 | function TDatasetRecList.Avg(AField: TField): Variant; 562 | var 563 | LCount: integer; 564 | begin 565 | LCount := Count; 566 | if LCount > 0 then 567 | Result := Sum(AField) / LCount 568 | else 569 | Result := Null; 570 | end; 571 | 572 | /// 573 | /// Gets the maximum value of a field 574 | /// If field is not a number type, an exception is thrown 575 | /// 576 | function TDatasetRecList.Max(AFieldName: string): Variant; 577 | begin 578 | Result := Max(FDataset.FieldByName(AFieldName)); 579 | end; 580 | 581 | /// 582 | /// Gets the maximum value of a field 583 | /// If field is not a number type, an exception is thrown 584 | /// 585 | function TDatasetRecList.Max(AField: TField): Variant; 586 | var 587 | LMax: Variant; 588 | begin 589 | LMax := Null; 590 | ForEach( 591 | procedure 592 | begin 593 | if (LMax = Null) or (AField.Value > LMax) then 594 | LMax := AField.Value; 595 | end); 596 | 597 | Result := LMax; 598 | end; 599 | 600 | /// 601 | /// Gets the minimum value of a field 602 | /// If field is not a number type, an exception is thrown 603 | /// 604 | function TDatasetRecList.Min(AFieldName: string): Variant; 605 | begin 606 | Result := Min(FDataset.FieldByName(AFieldName)); 607 | end; 608 | 609 | /// 610 | /// Gets the minimum value of a field 611 | /// If field is not a number type, an exception is thrown 612 | /// 613 | function TDatasetRecList.Min(AField: TField): Variant; 614 | var 615 | LMin: Variant; 616 | begin 617 | LMin := Null; 618 | ForEach( 619 | procedure 620 | begin 621 | if (LMin = Null) or (AField.Value < LMin) then 622 | LMin := AField.Value; 623 | end); 624 | 625 | Result := LMin; 626 | end; 627 | 628 | /// 629 | /// Gets the maximum value of a field 630 | /// If field is not a number type, an exception is thrown 631 | /// 632 | function TDatasetRecList.Sum(AFieldName: string): integer; 633 | begin 634 | Result := Sum(FDataset.FieldByName(AFieldName)); 635 | end; 636 | 637 | /// 638 | /// Gets the maximum value of a field 639 | /// If field is not a number type, an exception is thrown 640 | /// 641 | function TDatasetRecList.Sum(AField: TField): integer; 642 | var 643 | LTotal: integer; 644 | begin 645 | LTotal := 0; 646 | ForEach( 647 | procedure 648 | begin 649 | LTotal := LTotal + AField.Value; 650 | end); 651 | 652 | Result := LTotal; 653 | end; 654 | 655 | /// 656 | /// Sets a new value on a field of the current selected rows 657 | /// 658 | function TDatasetRecList.SetValue(AField: TField; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecList; 659 | begin 660 | ForEach( 661 | procedure 662 | begin 663 | TDatasetRecord.Create(FDataset, FDataset.RecNo).SetValue(AField, ANewValue, APostChanges); 664 | end); 665 | 666 | Result := self; 667 | end; 668 | 669 | /// 670 | /// Sets a new value on a field of the current selected rows 671 | /// 672 | function TDatasetRecList.SetValue(AFieldName: string; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecList; 673 | begin 674 | Result := SetValue(FDataset.FieldByName(AFieldName), ANewValue); 675 | end; 676 | 677 | function TDatasetRecList.SetValue(AFields: TDataFieldArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 678 | : IDatasetRecList; 679 | begin 680 | ForEach( 681 | procedure 682 | begin 683 | TDatasetRecord.Create(FDataset, FDataset.RecNo).SetValue(AFields, ANewValues, APostChanges); 684 | end); 685 | 686 | Result := self; 687 | end; 688 | 689 | function TDatasetRecList.SetValue(AFieldNames: TDataStringArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 690 | : IDatasetRecList; 691 | var 692 | LFields: TDataFieldArray; 693 | LIndex: integer; 694 | begin 695 | Setlength(LFields, Length(AFieldNames)); 696 | for LIndex := 0 to Length(AFieldNames) - 1 do 697 | LFields[LIndex] := FDataset.FieldByName(AFieldNames[LIndex]); 698 | Result := SetValue(LFields, ANewValues, APostChanges); 699 | end; 700 | 701 | /// 702 | /// Returns a group of rows that match the given expression 703 | /// 704 | function TDatasetRecList.Select(AFieldName: string; AValue: Variant): IDatasetRecList; 705 | begin 706 | Result := Select(FDataset.FieldByName(AFieldName), AValue); 707 | end; 708 | 709 | /// 710 | /// Returns a group of rows that match the given expression 711 | /// 712 | function TDatasetRecList.Select(AField: TField; AValue: Variant): IDatasetRecList; 713 | var 714 | LList: TList; 715 | begin 716 | LList := TList.Create; 717 | try 718 | ForEach( 719 | procedure 720 | begin 721 | if AField.Value = AValue then 722 | LList.Add(FDataset.RecNo); 723 | end); 724 | finally 725 | FList.Clear; 726 | FList.AddRange(LList); 727 | LList.Destroy; 728 | end; 729 | 730 | FAll := false; 731 | Result := self; 732 | end; 733 | 734 | function TDatasetRecList.SelectIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; 735 | begin 736 | Result := SelectIn(FDataset.FieldByName(AFieldName), AValues); 737 | end; 738 | 739 | function TDatasetRecList.SelectIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; 740 | var 741 | LList: TList; 742 | begin 743 | LList := TList.Create; 744 | try 745 | ForEach( 746 | procedure 747 | var 748 | LItem: Variant; 749 | begin 750 | for LItem in AValues do 751 | if LItem = AField.Value then 752 | begin 753 | LList.Add(FDataset.RecNo); 754 | break; 755 | end; 756 | end); 757 | finally 758 | FList.Clear; 759 | FList.AddRange(LList); 760 | LList.Destroy; 761 | end; 762 | 763 | FAll := false; 764 | Result := self; 765 | end; 766 | 767 | /// 768 | /// Returns a group of rows that doesnt match the given expression 769 | /// 770 | function TDatasetRecList.SelectNotEqual(AField: TField; AValue: Variant): IDatasetRecList; 771 | var 772 | LList: TList; 773 | begin 774 | LList := TList.Create; 775 | try 776 | ForEach( 777 | procedure 778 | begin 779 | if AField.Value <> AValue then 780 | LList.Add(FDataset.RecNo); 781 | end); 782 | finally 783 | FList.Clear; 784 | FList.AddRange(LList); 785 | LList.Destroy; 786 | end; 787 | 788 | FAll := false; 789 | Result := self; 790 | end; 791 | 792 | function TDatasetRecList.SelectNotIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; 793 | begin 794 | Result := SelectNotIn(FDataset.FieldByName(AFieldName), AValues); 795 | end; 796 | 797 | function TDatasetRecList.SelectNotIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; 798 | var 799 | LList: TList; 800 | begin 801 | LList := TList.Create; 802 | try 803 | ForEach( 804 | procedure 805 | var 806 | LItem: Variant; 807 | LInArray: boolean; 808 | begin 809 | LInArray:=false; 810 | for LItem in AValues do 811 | if LItem = AField.Value then 812 | begin 813 | LInArray:=true; 814 | break; 815 | end; 816 | 817 | if not LInArray then 818 | LList.Add(FDataset.RecNo); 819 | end); 820 | finally 821 | FList.Clear; 822 | FList.AddRange(LList); 823 | LList.Destroy; 824 | end; 825 | 826 | FAll := false; 827 | Result := self; 828 | end; 829 | 830 | /// 831 | /// Returns a group of rows that doesnt match the given expression 832 | /// 833 | function TDatasetRecList.SelectNotEqual(AFieldName: string; AValue: Variant): IDatasetRecList; 834 | begin 835 | Result := SelectNotEqual(FDataset.FieldByName(AFieldName), AValue); 836 | end; 837 | 838 | { TDatasetHelper } 839 | 840 | /// 841 | /// Returns all dataset rows 842 | /// 843 | function TDatasetHelper.All: IDatasetRecList; 844 | begin 845 | Result := TDatasetRecList.Create(self); 846 | end; 847 | 848 | /// 849 | /// Returns a group of rows that match the given expression 850 | /// 851 | function TDatasetHelper.Select(AFieldName: string; AValue: Variant): IDatasetRecList; 852 | begin 853 | Result := TDatasetRecList.Create(self).Select(AFieldName, AValue); 854 | end; 855 | 856 | function TDatasetHelper.Select(AField: TField; AValue: Variant): IDatasetRecList; 857 | begin 858 | Result := TDatasetRecList.Create(self).Select(AField, AValue); 859 | end; 860 | 861 | /// 862 | /// Returns a group of rows that match the given expression 863 | /// 864 | function TDatasetHelper.SelectIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; 865 | begin 866 | Result := TDatasetRecList.Create(self).SelectIn(AFieldName, AValues); 867 | end; 868 | 869 | function TDatasetHelper.SelectIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; 870 | begin 871 | Result := TDatasetRecList.Create(self).SelectIn(AField, AValues); 872 | end; 873 | 874 | /// 875 | /// Returns a group of rows that dosnt match the given expression 876 | /// 877 | function TDatasetHelper.SelectNotEqual(AFieldName: string; AValue: Variant): IDatasetRecList; 878 | begin 879 | Result := TDatasetRecList.Create(self).SelectNotEqual(AFieldName, AValue); 880 | end; 881 | 882 | function TDatasetHelper.SelectNotEqual(AField: TField; AValue: Variant): IDatasetRecList; 883 | begin 884 | Result := TDatasetRecList.Create(self).SelectNotEqual(AField, AValue); 885 | end; 886 | 887 | /// 888 | /// Returns a group of rows that doesnt match the given expression 889 | /// 890 | function TDatasetHelper.SelectNotIn(AFieldName: string; AValues: TDataVariantArray): IDatasetRecList; 891 | begin 892 | Result := TDatasetRecList.Create(self).SelectNotIn(AFieldName, AValues); 893 | end; 894 | 895 | function TDatasetHelper.SelectNotIn(AField: TField; AValues: TDataVariantArray): IDatasetRecList; 896 | begin 897 | Result := TDatasetRecList.Create(self).SelectNotIn(AField, AValues); 898 | end; 899 | 900 | /// 901 | /// Returns current dataset row 902 | /// 903 | function TDatasetHelper.Current: IDatasetRecord; 904 | begin 905 | Result := TDatasetRecord.Create(self, self.RecNo); 906 | end; 907 | 908 | { TDatasetRecord } 909 | 910 | function TDatasetRecord.AsArray(AFieldNames: TDataStringArray = []): TDataVariantArray; 911 | var 912 | LResult: TDataVariantArray; 913 | begin 914 | Setlength(LResult, 0); 915 | MoveToRecordAndReturn( 916 | procedure 917 | var 918 | LIndex: integer; 919 | LFieldName: string; 920 | begin 921 | if Length(AFieldNames) = 0 then 922 | begin 923 | // Set Values 924 | Setlength(LResult, FDataset.FieldCount); 925 | for LIndex := 0 to FDataset.FieldCount - 1 do 926 | LResult[LIndex] := FDataset.Fields[LIndex].Value; 927 | end 928 | else 929 | begin 930 | // Can be improved 931 | Setlength(LResult, Length(AFieldNames)); 932 | for LIndex := 0 to Length(AFieldNames) - 1 do 933 | if FDataset.FindField(AFieldNames[LIndex]) <> nil then 934 | LResult[LIndex] := FDataset.FindField(AFieldNames[LIndex]).Value; 935 | end; 936 | end); 937 | 938 | Result := LResult; 939 | end; 940 | 941 | constructor TDatasetRecord.Create(ADataset: TDataset; AIndex: integer); 942 | begin 943 | FDataset := ADataset; 944 | FIndex := AIndex; 945 | end; 946 | 947 | function TDatasetRecord.CreateCopyRecord(AOverrideFields: TDataStringArray; AOverrideValues: TDataVariantArray; 948 | AIgnoreFields: TDataStringArray; APostChanges: boolean): boolean; 949 | begin 950 | Result := CreateCopyRecordToDataset(FDataset, AOverrideFields, AOverrideValues, AIgnoreFields, APostChanges); 951 | end; 952 | 953 | function TDatasetRecord.CreateCopyRecordToDataset(ATargetDataset: TDataset; AOverrideFields: TDataStringArray; 954 | AOverrideValues: TDataVariantArray; AIgnoreFields: TDataStringArray; APostChanges: boolean): boolean; 955 | var 956 | LIndex: integer; 957 | LCurrentValues: TDataVariantArray; 958 | begin 959 | // 960 | Result := false; 961 | if ATargetDataset <> nil then 962 | begin 963 | ATargetDataset.DisableControls; 964 | try 965 | LCurrentValues := AsArray([]); 966 | ATargetDataset.Append; 967 | for LIndex := 0 to ATargetDataset.FieldCount - 1 do 968 | begin 969 | // Ignore Field 970 | if MatchText(ATargetDataset.Fields[LIndex].FieldName, AIgnoreFields) then 971 | continue; 972 | 973 | // Override Field Value 974 | if MatchText(ATargetDataset.Fields[LIndex].FieldName, AOverrideFields) then 975 | begin 976 | ATargetDataset.Fields[LIndex].Value := AOverrideValues 977 | [IndexText(ATargetDataset.Fields[LIndex].FieldName, AOverrideFields)]; 978 | continue; 979 | end; 980 | 981 | // Set Value 982 | ATargetDataset.Fields[LIndex].Value := LCurrentValues[LIndex]; 983 | 984 | end; 985 | 986 | if APostChanges then 987 | ATargetDataset.Post; 988 | finally 989 | Result := true; 990 | ATargetDataset.EnableControls; 991 | end; 992 | end; 993 | 994 | end; 995 | 996 | /// 997 | /// Deletes the current selected rows 998 | /// 999 | function TDatasetRecord.Delete: boolean; 1000 | var 1001 | LResult: boolean; 1002 | begin 1003 | LResult := false; 1004 | MoveToRecordAndReturn( 1005 | procedure 1006 | begin 1007 | try 1008 | FDataset.Delete; 1009 | finally 1010 | LResult := true; 1011 | end; 1012 | end); 1013 | 1014 | Result := LResult; 1015 | end; 1016 | 1017 | /// 1018 | /// Execute method in current record 1019 | /// 1020 | function TDatasetRecord.Execute(AProc: TProc): boolean; 1021 | var 1022 | LResult: boolean; 1023 | begin 1024 | LResult := false; 1025 | 1026 | MoveToRecordAndReturn( 1027 | procedure 1028 | begin 1029 | try 1030 | AProc(); 1031 | finally 1032 | LResult := true; 1033 | end; 1034 | end); 1035 | 1036 | Result := LResult; 1037 | end; 1038 | 1039 | function TDatasetRecord.GetValue(AField: TField): Variant; 1040 | var 1041 | LResult: Variant; 1042 | begin 1043 | LResult := Null; 1044 | MoveToRecordAndReturn( 1045 | procedure 1046 | begin 1047 | LResult := AField.Value; 1048 | end); 1049 | 1050 | Result := LResult; 1051 | end; 1052 | 1053 | procedure TDatasetRecord.MoveToRecordAndReturn(AProc: TProc); 1054 | var 1055 | LPrevRecNo: integer; 1056 | begin 1057 | if FIndex > 0 then 1058 | begin 1059 | FDataset.DisableControls; 1060 | try 1061 | LPrevRecNo := FDataset.RecNo; 1062 | FDataset.RecNo := FIndex; 1063 | AProc(); 1064 | FDataset.RecNo := LPrevRecNo; 1065 | finally 1066 | FDataset.EnableControls; 1067 | end; 1068 | end; 1069 | end; 1070 | 1071 | /// 1072 | /// Moves to record, edits, executes function and return to current record 1073 | /// 1074 | procedure TDatasetRecord.MoveToRecordEditAndReturn(APostChanges: boolean; AProc: TProc); 1075 | begin 1076 | MoveToRecordAndReturn( 1077 | procedure 1078 | begin 1079 | if not(FDataset.State in dsEditModes) then 1080 | FDataset.Edit; 1081 | AProc; 1082 | if APostChanges then 1083 | FDataset.Post; 1084 | end); 1085 | end; 1086 | 1087 | function TDatasetRecord.GetValue(AFieldName: string): Variant; 1088 | begin 1089 | if FDataset = nil then 1090 | Result := Null 1091 | else 1092 | Result := GetValue(FDataset.FieldByName(AFieldName)); 1093 | end; 1094 | 1095 | /// 1096 | /// Gets the rec of the first record 1097 | /// 1098 | function TDatasetRecord.RecNo: integer; 1099 | begin 1100 | Result := FIndex; 1101 | end; 1102 | 1103 | /// 1104 | /// Sets a new value on a field of the current selected rows 1105 | /// 1106 | function TDatasetRecord.SetValue(AFieldName: string; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecord; 1107 | begin 1108 | if FDataset = nil then 1109 | Result := self 1110 | else 1111 | Result := SetValue(FDataset.FieldByName(AFieldName), ANewValue, APostChanges); 1112 | end; 1113 | 1114 | /// 1115 | /// Sets a new value on a field of the current selected rows 1116 | /// 1117 | function TDatasetRecord.SetValue(AField: TField; ANewValue: Variant; APostChanges: boolean = true): IDatasetRecord; 1118 | begin 1119 | MoveToRecordEditAndReturn(APostChanges, 1120 | procedure 1121 | begin 1122 | AField.Value := ANewValue; 1123 | end); 1124 | 1125 | Result := self; 1126 | end; 1127 | 1128 | /// 1129 | /// Sets a new value on a field of the current selected rows 1130 | /// 1131 | function TDatasetRecord.SetValue(AFieldNames: TDataStringArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 1132 | : IDatasetRecord; 1133 | var 1134 | LFields: TDataFieldArray; 1135 | LIndex: integer; 1136 | begin 1137 | if FDataset = nil then 1138 | Result := self 1139 | else 1140 | begin 1141 | Setlength(LFields, Length(AFieldNames)); 1142 | for LIndex := 0 to Length(AFieldNames) - 1 do 1143 | LFields[LIndex] := FDataset.FieldByName(AFieldNames[LIndex]); 1144 | Result := SetValue(LFields, ANewValues, APostChanges); 1145 | end; 1146 | end; 1147 | 1148 | /// 1149 | /// Sets a new value on a field of the current selected rows 1150 | /// 1151 | function TDatasetRecord.SetValue(AFields: TDataFieldArray; ANewValues: TDataVariantArray; APostChanges: boolean = true) 1152 | : IDatasetRecord; 1153 | begin 1154 | MoveToRecordEditAndReturn(APostChanges, 1155 | procedure 1156 | var 1157 | LIndex: integer; 1158 | begin 1159 | for LIndex := 0 to Length(AFields) - 1 do 1160 | AFields[LIndex].Value := ANewValues[LIndex]; 1161 | end); 1162 | 1163 | Result := self; 1164 | end; 1165 | 1166 | /// 1167 | /// Copy values from array to current row 1168 | /// 1169 | procedure TDatasetRecord.SetValues(AValues: TDataVariantArray; APostChanges: boolean = true); 1170 | begin 1171 | MoveToRecordEditAndReturn(APostChanges, 1172 | procedure 1173 | var 1174 | LIndex: integer; 1175 | begin 1176 | for LIndex := 0 to Length(AValues) - 1 do 1177 | FDataset.Fields[LIndex].Value := AValues[LIndex]; 1178 | end); 1179 | end; 1180 | 1181 | end. 1182 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. For the purposes of this definition, 18 | "control" means (i) the power, direct or indirect, to cause the 19 | direction or management of such entity, whether by contract or 20 | otherwise, or (ii) ownership of fifty percent (50%) or more of the 21 | outstanding shares, or (iii) beneficial ownership of such entity. 22 | 23 | "You" (or "Your") shall mean an individual or Legal Entity 24 | exercising permissions granted by this License. 25 | 26 | "Source" form shall mean the preferred form for making modifications, 27 | including but not limited to software source code, documentation 28 | source, and configuration files. 29 | 30 | "Object" form shall mean any form resulting from mechanical 31 | transformation or translation of a Source form, including but 32 | not limited to compiled object code, generated documentation, 33 | and conversions to other media types. 34 | 35 | "Work" shall mean the work of authorship, whether in Source or 36 | Object form, made available under the License, as indicated by a 37 | copyright notice that is included in or attached to the work 38 | (an example is provided in the Appendix below). 39 | 40 | "Derivative Works" shall mean any work, whether in Source or Object 41 | form, that is based on (or derived from) the Work and for which the 42 | editorial revisions, annotations, elaborations, or other modifications 43 | represent, as a whole, an original work of authorship. For the purposes 44 | of this License, Derivative Works shall not include works that remain 45 | separable from, or merely link (or bind by name) to the interfaces of, 46 | the Work and Derivative Works thereof. 47 | 48 | "Contribution" shall mean any work of authorship, including 49 | the original version of the Work and any modifications or additions 50 | to that Work or Derivative Works thereof, that is intentionally 51 | submitted to Licensor for inclusion in the Work by the copyright owner 52 | or by an individual or Legal Entity authorized to submit on behalf of 53 | the copyright owner. For the purposes of this definition, "submitted" 54 | means any form of electronic, verbal, or written communication sent 55 | to the Licensor or its representatives, including but not limited to 56 | communication on electronic mailing lists, source code control systems, 57 | and issue tracking systems that are managed by, or on behalf of, the 58 | Licensor for the purpose of discussing and improving the Work, but 59 | excluding communication that is conspicuously marked or otherwise 60 | designated in writing by the copyright owner as "Not a Contribution." 61 | 62 | "Contributor" shall mean Licensor and any individual or Legal Entity 63 | on behalf of whom a Contribution has been received by Licensor and 64 | subsequently incorporated within the Work. 65 | 66 | 2. Grant of Copyright License. Subject to the terms and conditions of 67 | this License, each Contributor hereby grants to You a perpetual, 68 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 69 | copyright license to reproduce, prepare Derivative Works of, 70 | publicly display, publicly perform, sublicense, and distribute the 71 | Work and such Derivative Works in Source or Object form. 72 | 73 | 3. Grant of Patent License. Subject to the terms and conditions of 74 | this License, each Contributor hereby grants to You a perpetual, 75 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 76 | (except as stated in this section) patent license to make, have made, 77 | use, offer to sell, sell, import, and otherwise transfer the Work, 78 | where such license applies only to those patent claims licensable 79 | by such Contributor that are necessarily infringed by their 80 | Contribution(s) alone or by combination of their Contribution(s) 81 | with the Work to which such Contribution(s) was submitted. If You 82 | institute patent litigation against any entity (including a 83 | cross-claim or counterclaim in a lawsuit) alleging that the Work 84 | or a Contribution incorporated within the Work constitutes direct 85 | or contributory patent infringement, then any patent licenses 86 | granted to You under this License for that Work shall terminate 87 | as of the date such litigation is filed. 88 | 89 | 4. Redistribution. You may reproduce and distribute copies of the 90 | Work or Derivative Works thereof in any medium, with or without 91 | modifications, and in Source or Object form, provided that You 92 | meet the following conditions: 93 | 94 | (a) You must give any other recipients of the Work or 95 | Derivative Works a copy of this License; and 96 | 97 | (b) You must cause any modified files to carry prominent notices 98 | stating that You changed the files; and 99 | 100 | (c) You must retain, in the Source form of any Derivative Works 101 | that You distribute, all copyright, patent, trademark, and 102 | attribution notices from the Source form of the Work, 103 | excluding those notices that do not pertain to any part of 104 | the Derivative Works; and 105 | 106 | (d) If the Work includes a "NOTICE" text file as part of its 107 | distribution, then any Derivative Works that You distribute must 108 | include a readable copy of the attribution notices contained 109 | within such NOTICE file, excluding those notices that do not 110 | pertain to any part of the Derivative Works, in at least one 111 | of the following places: within a NOTICE text file distributed 112 | as part of the Derivative Works; within the Source form or 113 | documentation, if provided along with the Derivative Works; or, 114 | within a display generated by the Derivative Works, if and 115 | wherever such third-party notices normally appear. The contents 116 | of the NOTICE file are for informational purposes only and 117 | do not modify the License. You may add Your own attribution 118 | notices within Derivative Works that You distribute, alongside 119 | or as an addendum to the NOTICE text from the Work, provided 120 | that such additional attribution notices cannot be construed 121 | as modifying the License. 122 | 123 | You may add Your own copyright statement to Your modifications and 124 | may provide additional or different license terms and conditions 125 | for use, reproduction, or distribution of Your modifications, or 126 | for any such Derivative Works as a whole, provided Your use, 127 | reproduction, and distribution of the Work otherwise complies with 128 | the conditions stated in this License. 129 | 130 | 5. Submission of Contributions. Unless You explicitly state otherwise, 131 | any Contribution intentionally submitted for inclusion in the Work 132 | by You to the Licensor shall be under the terms and conditions of 133 | this License, without any additional terms or conditions. 134 | Notwithstanding the above, nothing herein shall supersede or modify 135 | the terms of any separate license agreement you may have executed 136 | with Licensor regarding such Contributions. 137 | 138 | 6. Trademarks. This License does not grant permission to use the trade 139 | names, trademarks, service marks, or product names of the Licensor, 140 | except as required for reasonable and customary use in describing the 141 | origin of the Work and reproducing the content of the NOTICE file. 142 | 143 | 7. Disclaimer of Warranty. Unless required by applicable law or 144 | agreed to in writing, Licensor provides the Work (and each 145 | Contributor provides its Contributions) on an "AS IS" BASIS, 146 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 147 | implied, including, without limitation, any warranties or conditions 148 | of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A 149 | PARTICULAR PURPOSE. You are solely responsible for determining the 150 | appropriateness of using or redistributing the Work and assume any 151 | risks associated with Your exercise of permissions under this License. 152 | 153 | 8. Limitation of Liability. In no event and under no legal theory, 154 | whether in tort (including negligence), contract, or otherwise, 155 | unless required by applicable law (such as deliberate and grossly 156 | negligent acts) or agreed to in writing, shall any Contributor be 157 | liable to You for damages, including any direct, indirect, special, 158 | incidental, or consequential damages of any character arising as a 159 | result of this License or out of the use or inability to use the 160 | Work (including but not limited to damages for loss of goodwill, 161 | work stoppage, computer failure or malfunction, or any and all 162 | other commercial damages or losses), even if such Contributor 163 | has been advised of the possibility of such damages. 164 | 165 | 9. Accepting Warranty or Additional Liability. While redistributing 166 | the Work or Derivative Works thereof, You may choose to offer, 167 | and charge a fee for, acceptance of support, warranty, indemnity, 168 | or other liability obligations and/or rights consistent with this 169 | License. However, in accepting such obligations, You may act only 170 | on Your own behalf and on Your sole responsibility, not on behalf 171 | of any other Contributor, and only if You agree to indemnify, 172 | defend, and hold each Contributor harmless for any liability 173 | incurred by, or claims asserted against, such Contributor by reason 174 | of your accepting any such warranty or additional liability. 175 | 176 | END OF TERMS AND CONDITIONS 177 | 178 | APPENDIX: How to apply the Apache License to your work. 179 | 180 | To apply the Apache License to your work, attach the following 181 | boilerplate notice, with the fields enclosed by brackets "[]" 182 | replaced with your own identifying information. (Don't include 183 | the brackets!) The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # DatasetHelper 2 | Class helper for TDataset 3 | Functions to ease the looping of datasets, getting and setting data. 4 |

Available Functions

5 | Selector Functions 6 |
    7 |
  • ALL (All dataset rows)
    • 8 |
  • CURRENT (Current dataset row)
    • 9 |
  • SELECT (Rows that match the given expression)
    • 10 |
  • SELECTNOTEQUAL (Rows that doesnt match the given expression)
    • 11 |
  • SELECTIN (Rows that match the given expression list)
    • 12 |
  • SELECTNOTIN (Rows that doesnt match the given expression list)
    • 13 |
  • FIRST (First row of current selection)
    • 14 |
  • LAST (Last row of current selection)
    • 15 |
16 | 17 | Row Group Functions 18 |
    19 |
  • MIN (Minimum value of a field)
    • 20 |
  • MAX (Maximum value of a field)
    • 21 |
  • AVG (Average value of a fieldn)
    • 22 |
  • SUM (Sum of values of a field)
    • 23 |
  • COUNT (Row coutn of current selection)
    • 24 |
  • SETVALUE (Change value of given field to all selected rows )
    • 25 |
  • FOREACH (Execute Anonymous procedure in all selected rows)
    • 26 |
  • DELETE (Deletes all selected rows)
    • 27 |
  • ASARRAY (Return 2D array with all information of all selected rows)
    • 28 |
  • ASLIST (Return List of 1D array with all information of all selected rows)
    • 29 |
30 | 31 | Single Row Functions 32 |
    33 |
  • SETVALUE (Change value of given field in current row)
    • 34 |
  • GETVALUE (Returns value of given field in current row)
    • 35 |
  • EXECUTE (Execute Anonymous procedure in current row)
    • 36 |
  • DELETE (Deletes current row)
    • 37 |
  • ASARRAY (Return array with all information of current row)
    • 38 |
  • RECNO (RecNo of current row in the dataset)
    • 39 |
  • CREATECOPYROW (Creates new row in dataset with the same values of the current row (Allows Ignore fields)
    • 40 |
41 | 42 |

Usage Examples

43 |

Get total record count

44 |

totalCount:=myDataset.All.Count;

45 |

Get record count of rows with category 'Other'

46 |

otherCount:=myDataset.Select('Category','Other').Count;

47 |

Get record count of rows with category 'Other' and Department = 1

48 |

otherCount:=myDataset.Select('Category','Other').Select('Department',1).Count;

49 |

Change category for all rows with category 'Other'

50 |

myDataset.Select('Category','Other').SetValue('Category','Misc');

51 |

Delete all rows with category 'Other'

52 |

myDataset.Select('Category','Other').Delete;

53 |

Get stock of first row with category 'Other'

54 |

stock:=myDataset.Select('Category','Other').First.GetValue('Stock');

55 |

Get array with name and stock of first row with category 'Other'

56 |

arr:=myDataset.Select('Category','Other').First.AsArray(['Name','Stock']);

57 |

Copy first row with category 'Other' overriding ID with value 6

58 |

myDataset.Select('Category','Other').First.CreateCopyRecord(['ID'],[6]);

59 | --------------------------------------------------------------------------------