├── .gitignore ├── ChannelDemo.sln ├── ChannelDemo ├── ChannelDemo.csproj ├── GlobalUsings.cs └── Program.cs └── README.md /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from `dotnet new gitignore` 5 | 6 | # dotenv files 7 | .env 8 | 9 | # User-specific files 10 | *.rsuser 11 | *.suo 12 | *.user 13 | *.userosscache 14 | *.sln.docstates 15 | 16 | # User-specific files (MonoDevelop/Xamarin Studio) 17 | *.userprefs 18 | 19 | # Mono auto generated files 20 | mono_crash.* 21 | 22 | # Build results 23 | [Dd]ebug/ 24 | [Dd]ebugPublic/ 25 | [Rr]elease/ 26 | [Rr]eleases/ 27 | x64/ 28 | x86/ 29 | [Ww][Ii][Nn]32/ 30 | [Aa][Rr][Mm]/ 31 | [Aa][Rr][Mm]64/ 32 | bld/ 33 | [Bb]in/ 34 | [Oo]bj/ 35 | [Ll]og/ 36 | [Ll]ogs/ 37 | 38 | # Visual Studio 2015/2017 cache/options directory 39 | .vs/ 40 | # Uncomment if you have tasks that create the project's static files in wwwroot 41 | #wwwroot/ 42 | 43 | # Visual Studio 2017 auto generated files 44 | Generated\ Files/ 45 | 46 | # MSTest test Results 47 | [Tt]est[Rr]esult*/ 48 | [Bb]uild[Ll]og.* 49 | 50 | # NUnit 51 | *.VisualState.xml 52 | TestResult.xml 53 | nunit-*.xml 54 | 55 | # Build Results of an ATL Project 56 | [Dd]ebugPS/ 57 | [Rr]eleasePS/ 58 | dlldata.c 59 | 60 | # Benchmark Results 61 | BenchmarkDotNet.Artifacts/ 62 | 63 | # .NET 64 | project.lock.json 65 | project.fragment.lock.json 66 | artifacts/ 67 | 68 | # Tye 69 | .tye/ 70 | 71 | # ASP.NET Scaffolding 72 | ScaffoldingReadMe.txt 73 | 74 | # StyleCop 75 | StyleCopReport.xml 76 | 77 | # Files built by Visual Studio 78 | *_i.c 79 | *_p.c 80 | *_h.h 81 | *.ilk 82 | *.meta 83 | *.obj 84 | *.iobj 85 | *.pch 86 | *.pdb 87 | *.ipdb 88 | *.pgc 89 | *.pgd 90 | *.rsp 91 | *.sbr 92 | *.tlb 93 | *.tli 94 | *.tlh 95 | *.tmp 96 | *.tmp_proj 97 | *_wpftmp.csproj 98 | *.log 99 | *.tlog 100 | *.vspscc 101 | *.vssscc 102 | .builds 103 | *.pidb 104 | *.svclog 105 | *.scc 106 | 107 | # Chutzpah Test files 108 | _Chutzpah* 109 | 110 | # Visual C++ cache files 111 | ipch/ 112 | *.aps 113 | *.ncb 114 | *.opendb 115 | *.opensdf 116 | *.sdf 117 | *.cachefile 118 | *.VC.db 119 | *.VC.VC.opendb 120 | 121 | # Visual Studio profiler 122 | *.psess 123 | *.vsp 124 | *.vspx 125 | *.sap 126 | 127 | # Visual Studio Trace Files 128 | *.e2e 129 | 130 | # TFS 2012 Local Workspace 131 | $tf/ 132 | 133 | # Guidance Automation Toolkit 134 | *.gpState 135 | 136 | # ReSharper is a .NET coding add-in 137 | _ReSharper*/ 138 | *.[Rr]e[Ss]harper 139 | *.DotSettings.user 140 | 141 | # TeamCity is a build add-in 142 | _TeamCity* 143 | 144 | # DotCover is a Code Coverage Tool 145 | *.dotCover 146 | 147 | # AxoCover is a Code Coverage Tool 148 | .axoCover/* 149 | !.axoCover/settings.json 150 | 151 | # Coverlet is a free, cross platform Code Coverage Tool 152 | coverage*.json 153 | coverage*.xml 154 | coverage*.info 155 | 156 | # Visual Studio code coverage results 157 | *.coverage 158 | *.coveragexml 159 | 160 | # NCrunch 161 | _NCrunch_* 162 | .*crunch*.local.xml 163 | nCrunchTemp_* 164 | 165 | # MightyMoose 166 | *.mm.* 167 | AutoTest.Net/ 168 | 169 | # Web workbench (sass) 170 | .sass-cache/ 171 | 172 | # Installshield output folder 173 | [Ee]xpress/ 174 | 175 | # DocProject is a documentation generator add-in 176 | DocProject/buildhelp/ 177 | DocProject/Help/*.HxT 178 | DocProject/Help/*.HxC 179 | DocProject/Help/*.hhc 180 | DocProject/Help/*.hhk 181 | DocProject/Help/*.hhp 182 | DocProject/Help/Html2 183 | DocProject/Help/html 184 | 185 | # Click-Once directory 186 | publish/ 187 | 188 | # Publish Web Output 189 | *.[Pp]ublish.xml 190 | *.azurePubxml 191 | # Note: Comment the next line if you want to checkin your web deploy settings, 192 | # but database connection strings (with potential passwords) will be unencrypted 193 | *.pubxml 194 | *.publishproj 195 | 196 | # Microsoft Azure Web App publish settings. Comment the next line if you want to 197 | # checkin your Azure Web App publish settings, but sensitive information contained 198 | # in these scripts will be unencrypted 199 | PublishScripts/ 200 | 201 | # NuGet Packages 202 | *.nupkg 203 | # NuGet Symbol Packages 204 | *.snupkg 205 | # The packages folder can be ignored because of Package Restore 206 | **/[Pp]ackages/* 207 | # except build/, which is used as an MSBuild target. 208 | !**/[Pp]ackages/build/ 209 | # Uncomment if necessary however generally it will be regenerated when needed 210 | #!**/[Pp]ackages/repositories.config 211 | # NuGet v3's project.json files produces more ignorable files 212 | *.nuget.props 213 | *.nuget.targets 214 | 215 | # Microsoft Azure Build Output 216 | csx/ 217 | *.build.csdef 218 | 219 | # Microsoft Azure Emulator 220 | ecf/ 221 | rcf/ 222 | 223 | # Windows Store app package directories and files 224 | AppPackages/ 225 | BundleArtifacts/ 226 | Package.StoreAssociation.xml 227 | _pkginfo.txt 228 | *.appx 229 | *.appxbundle 230 | *.appxupload 231 | 232 | # Visual Studio cache files 233 | # files ending in .cache can be ignored 234 | *.[Cc]ache 235 | # but keep track of directories ending in .cache 236 | !?*.[Cc]ache/ 237 | 238 | # Others 239 | ClientBin/ 240 | ~$* 241 | *~ 242 | *.dbmdl 243 | *.dbproj.schemaview 244 | *.jfm 245 | *.pfx 246 | *.publishsettings 247 | orleans.codegen.cs 248 | 249 | # Including strong name files can present a security risk 250 | # (https://github.com/github/gitignore/pull/2483#issue-259490424) 251 | #*.snk 252 | 253 | # Since there are multiple workflows, uncomment next line to ignore bower_components 254 | # (https://github.com/github/gitignore/pull/1529#issuecomment-104372622) 255 | #bower_components/ 256 | 257 | # RIA/Silverlight projects 258 | Generated_Code/ 259 | 260 | # Backup & report files from converting an old project file 261 | # to a newer Visual Studio version. Backup files are not needed, 262 | # because we have git ;-) 263 | _UpgradeReport_Files/ 264 | Backup*/ 265 | UpgradeLog*.XML 266 | UpgradeLog*.htm 267 | ServiceFabricBackup/ 268 | *.rptproj.bak 269 | 270 | # SQL Server files 271 | *.mdf 272 | *.ldf 273 | *.ndf 274 | 275 | # Business Intelligence projects 276 | *.rdl.data 277 | *.bim.layout 278 | *.bim_*.settings 279 | *.rptproj.rsuser 280 | *- [Bb]ackup.rdl 281 | *- [Bb]ackup ([0-9]).rdl 282 | *- [Bb]ackup ([0-9][0-9]).rdl 283 | 284 | # Microsoft Fakes 285 | FakesAssemblies/ 286 | 287 | # GhostDoc plugin setting file 288 | *.GhostDoc.xml 289 | 290 | # Node.js Tools for Visual Studio 291 | .ntvs_analysis.dat 292 | node_modules/ 293 | 294 | # Visual Studio 6 build log 295 | *.plg 296 | 297 | # Visual Studio 6 workspace options file 298 | *.opt 299 | 300 | # Visual Studio 6 auto-generated workspace file (contains which files were open etc.) 301 | *.vbw 302 | 303 | # Visual Studio 6 auto-generated project file (contains which files were open etc.) 304 | *.vbp 305 | 306 | # Visual Studio 6 workspace and project file (working project files containing files to include in project) 307 | *.dsw 308 | *.dsp 309 | 310 | # Visual Studio 6 technical files 311 | *.ncb 312 | *.aps 313 | 314 | # Visual Studio LightSwitch build output 315 | **/*.HTMLClient/GeneratedArtifacts 316 | **/*.DesktopClient/GeneratedArtifacts 317 | **/*.DesktopClient/ModelManifest.xml 318 | **/*.Server/GeneratedArtifacts 319 | **/*.Server/ModelManifest.xml 320 | _Pvt_Extensions 321 | 322 | # Paket dependency manager 323 | .paket/paket.exe 324 | paket-files/ 325 | 326 | # FAKE - F# Make 327 | .fake/ 328 | 329 | # CodeRush personal settings 330 | .cr/personal 331 | 332 | # Python Tools for Visual Studio (PTVS) 333 | __pycache__/ 334 | *.pyc 335 | 336 | # Cake - Uncomment if you are using it 337 | # tools/** 338 | # !tools/packages.config 339 | 340 | # Tabs Studio 341 | *.tss 342 | 343 | # Telerik's JustMock configuration file 344 | *.jmconfig 345 | 346 | # BizTalk build output 347 | *.btp.cs 348 | *.btm.cs 349 | *.odx.cs 350 | *.xsd.cs 351 | 352 | # OpenCover UI analysis results 353 | OpenCover/ 354 | 355 | # Azure Stream Analytics local run output 356 | ASALocalRun/ 357 | 358 | # MSBuild Binary and Structured Log 359 | *.binlog 360 | 361 | # NVidia Nsight GPU debugger configuration file 362 | *.nvuser 363 | 364 | # MFractors (Xamarin productivity tool) working folder 365 | .mfractor/ 366 | 367 | # Local History for Visual Studio 368 | .localhistory/ 369 | 370 | # Visual Studio History (VSHistory) files 371 | .vshistory/ 372 | 373 | # BeatPulse healthcheck temp database 374 | healthchecksdb 375 | 376 | # Backup folder for Package Reference Convert tool in Visual Studio 2017 377 | MigrationBackup/ 378 | 379 | # Ionide (cross platform F# VS Code tools) working folder 380 | .ionide/ 381 | 382 | # Fody - auto-generated XML schema 383 | FodyWeavers.xsd 384 | 385 | # VS Code files for those working on multiple tools 386 | .vscode/* 387 | !.vscode/settings.json 388 | !.vscode/tasks.json 389 | !.vscode/launch.json 390 | !.vscode/extensions.json 391 | *.code-workspace 392 | 393 | # Local History for Visual Studio Code 394 | .history/ 395 | 396 | # Windows Installer files from build outputs 397 | *.cab 398 | *.msi 399 | *.msix 400 | *.msm 401 | *.msp 402 | 403 | # JetBrains Rider 404 | *.sln.iml 405 | .idea 406 | 407 | ## 408 | ## Visual studio for Mac 409 | ## 410 | 411 | 412 | # globs 413 | Makefile.in 414 | *.userprefs 415 | *.usertasks 416 | config.make 417 | config.status 418 | aclocal.m4 419 | install-sh 420 | autom4te.cache/ 421 | *.tar.gz 422 | tarballs/ 423 | test-results/ 424 | 425 | # Mac bundle stuff 426 | *.dmg 427 | *.app 428 | 429 | # content below from: https://github.com/github/gitignore/blob/master/Global/macOS.gitignore 430 | # General 431 | .DS_Store 432 | .AppleDouble 433 | .LSOverride 434 | 435 | # Icon must end with two \r 436 | Icon 437 | 438 | 439 | # Thumbnails 440 | ._* 441 | 442 | # Files that might appear in the root of a volume 443 | .DocumentRevisions-V100 444 | .fseventsd 445 | .Spotlight-V100 446 | .TemporaryItems 447 | .Trashes 448 | .VolumeIcon.icns 449 | .com.apple.timemachine.donotpresent 450 | 451 | # Directories potentially created on remote AFP share 452 | .AppleDB 453 | .AppleDesktop 454 | Network Trash Folder 455 | Temporary Items 456 | .apdisk 457 | 458 | # content below from: https://github.com/github/gitignore/blob/master/Global/Windows.gitignore 459 | # Windows thumbnail cache files 460 | Thumbs.db 461 | ehthumbs.db 462 | ehthumbs_vista.db 463 | 464 | # Dump file 465 | *.stackdump 466 | 467 | # Folder config file 468 | [Dd]esktop.ini 469 | 470 | # Recycle Bin used on file shares 471 | $RECYCLE.BIN/ 472 | 473 | # Windows Installer files 474 | *.cab 475 | *.msi 476 | *.msix 477 | *.msm 478 | *.msp 479 | 480 | # Windows shortcuts 481 | *.lnk 482 | 483 | # Vim temporary swap files 484 | *.swp 485 | -------------------------------------------------------------------------------- /ChannelDemo.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 17 4 | VisualStudioVersion = 17.5.002.0 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ChannelDemo", "ChannelDemo\ChannelDemo.csproj", "{4FB24C96-8F73-48BF-942F-0954661C5341}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|Any CPU = Debug|Any CPU 11 | Release|Any CPU = Release|Any CPU 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {4FB24C96-8F73-48BF-942F-0954661C5341}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {4FB24C96-8F73-48BF-942F-0954661C5341}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {4FB24C96-8F73-48BF-942F-0954661C5341}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {4FB24C96-8F73-48BF-942F-0954661C5341}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | GlobalSection(ExtensibilityGlobals) = postSolution 23 | SolutionGuid = {E08AEA9E-DAA0-4DF2-974D-686F0E06FC9D} 24 | EndGlobalSection 25 | EndGlobal 26 | -------------------------------------------------------------------------------- /ChannelDemo/ChannelDemo.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | Exe 5 | net8.0 6 | enable 7 | enable 8 | 9 | 10 | -------------------------------------------------------------------------------- /ChannelDemo/GlobalUsings.cs: -------------------------------------------------------------------------------- 1 | global using System.Collections.Concurrent; 2 | global using System.Threading.Channels; -------------------------------------------------------------------------------- /ChannelDemo/Program.cs: -------------------------------------------------------------------------------- 1 | var channel = Channel.CreateUnbounded(); 2 | 3 | var sender = SendMessageThreadAsync(channel.Writer, 1); 4 | var receiver = ReceiveMessageThreadAsync(channel.Reader, 1); 5 | 6 | await sender; 7 | // make sure all messages are received 8 | channel.Writer.Complete(); 9 | await receiver; 10 | 11 | Console.WriteLine("Press any key to exit..."); 12 | Console.ReadKey(); 13 | 14 | async Task SendMessageThreadAsync(ChannelWriter writer, int id) 15 | { 16 | for (int i = 1; i <= 20; i++) 17 | { 18 | await writer.WriteAsync(new Message(id, i.ToString())); 19 | Console.WriteLine($"Thread {id} sent {i}"); 20 | await Task.Delay(100); 21 | } 22 | // we don't complete the writer here since there may be more than one senders 23 | } 24 | 25 | async Task ReceiveMessageThreadAsync(ChannelReader reader, int id) 26 | { 27 | await foreach (var message in reader.ReadAllAsync()) 28 | { 29 | Console.WriteLine($"Thread {id} received {message.Content}"); 30 | } 31 | } 32 | 33 | record Message(int FromId, string Content); 34 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Channel Demo 2 | 3 | 本项目旨在演示 C# 中 `Channel` 的基本用法。 4 | 5 | 查看 commit 提交历史可以看到每一步的变化： 6 | 7 | 1. 使用传统的线程（`Thread`）与阻塞集合（`BlockingCollection`） 8 | 2. 将阻塞集合修改为 `Channel`，并仍然使用同步方法 9 | 3. 使用异步方法，并使用 `CancellationToken` 来取消接收任务 10 | 4. 使用 `ChannelWriter.Complete` 方法取代 `CancellationToken` 11 | 5. 使用 `await foreach`，即 `IAsyncEnumerable` 接口取代对于 `Completed` 状态的观察及 `ChannelClosedException` 异常的捕获 --------------------------------------------------------------------------------