├── .gitignore ├── EFCore.SqlServer.WithNoLock.sln ├── LICENSE ├── README.md ├── src └── EFCore.SqlServer.WithNoLock │ ├── EFCore.SqlServer.WithNoLock.csproj │ ├── EntityFrameworkQueryableExtensions.cs │ ├── SqlServerServiceCollectionExtensions.cs │ ├── WithNoLockExpressionNode.cs │ ├── WithNoLockMaterializerFactory.cs │ ├── WithNoLockResultOperator.cs │ ├── WithNoLockSqlServerQuerySqlGenerator.cs │ ├── WithNoLockSqlServerQuerySqlGeneratorFactory.cs │ └── WithNoLockTableExpression.cs └── test └── EFCore.SqlServer.WithNoLock.UnitTest ├── Category.cs ├── EFCore.SqlServer.WithNoLock.UnitTest.csproj ├── SampleDbContext.cs └── WithNoLock_Test.cs /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore 5 | 6 | # User-specific files 7 | *.suo 8 | *.user 9 | *.userosscache 10 | *.sln.docstates 11 | 12 | # User-specific files (MonoDevelop/Xamarin Studio) 13 | *.userprefs 14 | 15 | # Build results 16 | [Dd]ebug/ 17 | [Dd]ebugPublic/ 18 | [Rr]elease/ 19 | [Rr]eleases/ 20 | x64/ 21 | x86/ 22 | bld/ 23 | [Bb]in/ 24 | [Oo]bj/ 25 | [Ll]og/ 26 | 27 | # Visual Studio 2015/2017 cache/options directory 28 | .vs/ 29 | # Uncomment if you have tasks that create the project's static files in wwwroot 30 | #wwwroot/ 31 | 32 | # Visual Studio 2017 auto generated files 33 | Generated\ Files/ 34 | 35 | # MSTest test Results 36 | [Tt]est[Rr]esult*/ 37 | [Bb]uild[Ll]og.* 38 | 39 | # NUNIT 40 | *.VisualState.xml 41 | TestResult.xml 42 | 43 | # Build Results of an ATL Project 44 | [Dd]ebugPS/ 45 | [Rr]eleasePS/ 46 | dlldata.c 47 | 48 | # Benchmark Results 49 | BenchmarkDotNet.Artifacts/ 50 | 51 | # .NET Core 52 | project.lock.json 53 | project.fragment.lock.json 54 | artifacts/ 55 | **/Properties/launchSettings.json 56 | 57 | # StyleCop 58 | StyleCopReport.xml 59 | 60 | # Files built by Visual Studio 61 | *_i.c 62 | *_p.c 63 | *_i.h 64 | *.ilk 65 | *.meta 66 | *.obj 67 | *.iobj 68 | *.pch 69 | *.pdb 70 | *.ipdb 71 | *.pgc 72 | *.pgd 73 | *.rsp 74 | *.sbr 75 | *.tlb 76 | *.tli 77 | *.tlh 78 | *.tmp 79 | *.tmp_proj 80 | *.log 81 | *.vspscc 82 | *.vssscc 83 | .builds 84 | *.pidb 85 | *.svclog 86 | *.scc 87 | 88 | # Chutzpah Test files 89 | _Chutzpah* 90 | 91 | # Visual C++ cache files 92 | ipch/ 93 | *.aps 94 | *.ncb 95 | *.opendb 96 | *.opensdf 97 | *.sdf 98 | *.cachefile 99 | *.VC.db 100 | *.VC.VC.opendb 101 | 102 | # Visual Studio profiler 103 | *.psess 104 | *.vsp 105 | *.vspx 106 | *.sap 107 | 108 | # Visual Studio Trace Files 109 | *.e2e 110 | 111 | # TFS 2012 Local Workspace 112 | $tf/ 113 | 114 | # Guidance Automation Toolkit 115 | *.gpState 116 | 117 | # ReSharper is a .NET coding add-in 118 | _ReSharper*/ 119 | *.[Rr]e[Ss]harper 120 | *.DotSettings.user 121 | 122 | # JustCode is a .NET coding add-in 123 | .JustCode 124 | 125 | # TeamCity is a build add-in 126 | _TeamCity* 127 | 128 | # DotCover is a Code Coverage Tool 129 | *.dotCover 130 | 131 | # AxoCover is a Code Coverage Tool 132 | .axoCover/* 133 | !.axoCover/settings.json 134 | 135 | # Visual Studio code coverage results 136 | *.coverage 137 | *.coveragexml 138 | 139 | # NCrunch 140 | _NCrunch_* 141 | .*crunch*.local.xml 142 | nCrunchTemp_* 143 | 144 | # MightyMoose 145 | *.mm.* 146 | AutoTest.Net/ 147 | 148 | # Web workbench (sass) 149 | .sass-cache/ 150 | 151 | # Installshield output folder 152 | [Ee]xpress/ 153 | 154 | # DocProject is a documentation generator add-in 155 | DocProject/buildhelp/ 156 | DocProject/Help/*.HxT 157 | DocProject/Help/*.HxC 158 | DocProject/Help/*.hhc 159 | DocProject/Help/*.hhk 160 | DocProject/Help/*.hhp 161 | DocProject/Help/Html2 162 | DocProject/Help/html 163 | 164 | # Click-Once directory 165 | publish/ 166 | 167 | # Publish Web Output 168 | *.[Pp]ublish.xml 169 | *.azurePubxml 170 | # Note: Comment the next line if you want to checkin your web deploy settings, 171 | # but database connection strings (with potential passwords) will be unencrypted 172 | *.pubxml 173 | *.publishproj 174 | 175 | # Microsoft Azure Web App publish settings. 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2 | using System.Linq; 3 | using System.Linq.Expressions; 4 | using System.Reflection; 5 | using Microsoft.EntityFrameworkCore.Query.Internal; 6 | 7 | namespace Microsoft.EntityFrameworkCore.SqlServer.WithNoLock 8 | { 9 | public static class EntityFrameworkQueryableExtensions 10 | { 11 | internal static readonly MethodInfo WithNoLockMethodInfo 12 | = typeof(EntityFrameworkQueryableExtensions) 13 | .GetTypeInfo().GetDeclaredMethods(nameof(WithNoLock)) 14 | .Single(); 15 | 16 | public static IQueryable WithNoLock( 17 | this IQueryable source) 18 | where TEntity : class 19 | { 20 | if (source == null) 21 | throw new ArgumentNullException(nameof(source)); 22 | 23 | return 24 | source.Provider is EntityQueryProvider 25 | ? source.Provider.CreateQuery( 26 | Expression.Call( 27 | instance: null, 28 | method: WithNoLockMethodInfo.MakeGenericMethod(typeof(TEntity)), 29 | arguments: source.Expression)) 30 | : source; 31 | } 32 | 33 | } 34 | } 35 | -------------------------------------------------------------------------------- /src/EFCore.SqlServer.WithNoLock/SqlServerServiceCollectionExtensions.cs: -------------------------------------------------------------------------------- 1 | using Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal; 2 | using Microsoft.EntityFrameworkCore.Query.Sql; 3 | using Microsoft.EntityFrameworkCore.SqlServer.Infrastructure.Internal; 4 | using Microsoft.EntityFrameworkCore.SqlServer.WithNoLock; 5 | 6 | 7 | // ReSharper disable once CheckNamespace 8 | namespace Microsoft.EntityFrameworkCore 9 | { 10 | public static class SqlServerDbContextOptionsExtensions 11 | { 12 | public static DbContextOptionsBuilder EnableSqlServerWithNoLock(this DbContextOptionsBuilder optionsBuilder) 13 | { 14 | var sqlServerOptionsExtension = optionsBuilder.Options.FindExtension(); 15 | if (sqlServerOptionsExtension == null) 16 | return optionsBuilder; 17 | 18 | optionsBuilder = optionsBuilder 19 | .ReplaceService(); 20 | return optionsBuilder.ReplaceService(); 21 | } 22 | } 23 | } 24 | -------------------------------------------------------------------------------- /src/EFCore.SqlServer.WithNoLock/WithNoLockExpressionNode.cs: -------------------------------------------------------------------------------- 1 | using System.Collections.Generic; 2 | using System.Linq.Expressions; 3 | using System.Reflection; 4 | using Remotion.Linq.Clauses; 5 | using Remotion.Linq.Parsing.Structure.IntermediateModel; 6 | 7 | namespace Microsoft.EntityFrameworkCore.SqlServer.WithNoLock 8 | { 9 | internal class WithNoLockExpressionNode : ResultOperatorExpressionNodeBase 10 | { 11 | public static readonly IReadOnlyCollection SupportedMethods = 12 | new[] { 13 | EntityFrameworkQueryableExtensions.WithNoLockMethodInfo 14 | }; 15 | 16 | public WithNoLockExpressionNode(MethodCallExpressionParseInfo parseInfo) : base(parseInfo, null, null) 17 | { 18 | } 19 | 20 | 21 | protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext) => 22 | new WithNoLockResultOperator(); 23 | 24 | 25 | public override Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved, 26 | ClauseGenerationContext clauseGenerationContext) => 27 | Source.Resolve(inputParameter, expressionToBeResolved, clauseGenerationContext); 28 | } 29 | } 30 | 31 | -------------------------------------------------------------------------------- /src/EFCore.SqlServer.WithNoLock/WithNoLockMaterializerFactory.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Linq.Expressions; 5 | using System.Reflection; 6 | using System.Text; 7 | using Microsoft.EntityFrameworkCore.Metadata; 8 | using Microsoft.EntityFrameworkCore.Metadata.Internal; 9 | using Microsoft.EntityFrameworkCore.Query; 10 | using Microsoft.EntityFrameworkCore.Query.Expressions; 11 | using Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal; 12 | 13 | namespace Microsoft.EntityFrameworkCore.SqlServer.WithNoLock 14 | { 15 | internal class WithNoLockMaterializerFactory: MaterializerFactory 16 | { 17 | private static readonly Func _getQueryCompilationContext; 18 | 19 | static WithNoLockMaterializerFactory() 20 | { 21 | _getQueryCompilationContext = Compile(); 22 | } 23 | 24 | public WithNoLockMaterializerFactory(IEntityMaterializerSource entityMaterializerSource) : base(entityMaterializerSource) 25 | { 26 | } 27 | 28 | public override LambdaExpression CreateMaterializer(IEntityType entityType, SelectExpression selectExpression, Func projectionAdder, 29 | out Dictionary typeIndexMap) 30 | { 31 | if (selectExpression == null) 32 | throw new ArgumentNullException(nameof(selectExpression)); 33 | 34 | RelationalQueryCompilationContext queryCompilationContext = 35 | _getQueryCompilationContext(selectExpression); 36 | var isWithNoLock = queryCompilationContext.QueryAnnotations.OfType().Any(); 37 | if (isWithNoLock) 38 | { 39 | IEnumerable tableExpressions = selectExpression.Tables.OfType().ToArray(); 40 | foreach (TableExpression tableExpression in tableExpressions) 41 | { 42 | WithNoLockTableExpression withNoLockTableExpression = 43 | new WithNoLockTableExpression(tableExpression.Table, tableExpression.Schema, 44 | tableExpression.Alias, tableExpression.QuerySource); 45 | selectExpression.RemoveTable(tableExpression); 46 | selectExpression.AddTable(withNoLockTableExpression); 47 | } 48 | } 49 | 50 | 51 | return base.CreateMaterializer(entityType, selectExpression, projectionAdder, out typeIndexMap); 52 | } 53 | 54 | private static Func Compile() 55 | { 56 | var selectExpressionType = typeof(SelectExpression); 57 | 58 | var fieldInfo = selectExpressionType.GetTypeInfo().GetRuntimeFields() 59 | .Single(f => f.FieldType == typeof(RelationalQueryCompilationContext)); 60 | 61 | var parameterExpression = Expression.Parameter(selectExpressionType, "selectExpression"); 62 | 63 | var contextExpression = Expression.Field(parameterExpression, fieldInfo); 64 | 65 | return Expression 66 | .Lambda>(contextExpression, 67 | parameterExpression).Compile(); 68 | 69 | } 70 | } 71 | } 72 | -------------------------------------------------------------------------------- /src/EFCore.SqlServer.WithNoLock/WithNoLockResultOperator.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq.Expressions; 3 | using Microsoft.EntityFrameworkCore.Query.ResultOperators; 4 | using Remotion.Linq; 5 | using Remotion.Linq.Clauses; 6 | using Remotion.Linq.Clauses.ResultOperators; 7 | using Remotion.Linq.Clauses.StreamedData; 8 | 9 | namespace Microsoft.EntityFrameworkCore.SqlServer.WithNoLock 10 | { 11 | internal class WithNoLockResultOperator : SequenceTypePreservingResultOperatorBase, IQueryAnnotation 12 | { 13 | 14 | public virtual IQuerySource QuerySource { get; set; } 15 | 16 | 17 | public virtual QueryModel QueryModel { get; set; } 18 | 19 | 20 | public override string ToString() => "WithNoLock()"; 21 | 22 | public override ResultOperatorBase Clone(CloneContext cloneContext) => new WithNoLockResultOperator(); 23 | 24 | public override void TransformExpressions(Func transformation) 25 | { 26 | } 27 | 28 | public override StreamedSequence ExecuteInMemory(StreamedSequence input) => input; 29 | } 30 | } 31 | -------------------------------------------------------------------------------- /src/EFCore.SqlServer.WithNoLock/WithNoLockSqlServerQuerySqlGenerator.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using System.Linq.Expressions; 4 | using System.Reflection; 5 | using Microsoft.EntityFrameworkCore.Query; 6 | using Microsoft.EntityFrameworkCore.Query.Expressions; 7 | using Microsoft.EntityFrameworkCore.Query.Sql; 8 | using Microsoft.EntityFrameworkCore.SqlServer.Query.Sql.Internal; 9 | using Microsoft.EntityFrameworkCore.Storage; 10 | 11 | namespace Microsoft.EntityFrameworkCore.SqlServer.WithNoLock 12 | { 13 | internal class WithNoLockSqlServerQuerySqlGenerator : SqlServerQuerySqlGenerator 14 | { 15 | public WithNoLockSqlServerQuerySqlGenerator(QuerySqlGeneratorDependencies dependencies, 16 | SelectExpression selectExpression, bool rowNumberPagingEnabled) : base(dependencies, selectExpression, 17 | rowNumberPagingEnabled) 18 | { 19 | 20 | } 21 | 22 | 23 | public override Expression VisitTable(TableExpression tableExpression) 24 | { 25 | var expression = base.VisitTable(tableExpression); 26 | 27 | if (tableExpression is WithNoLockTableExpression) 28 | Sql.Append(" With(nolock) "); 29 | return expression; 30 | } 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /src/EFCore.SqlServer.WithNoLock/WithNoLockSqlServerQuerySqlGeneratorFactory.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Text; 4 | using Microsoft.EntityFrameworkCore.Query.Expressions; 5 | using Microsoft.EntityFrameworkCore.Query.Internal; 6 | using Microsoft.EntityFrameworkCore.Query.Sql; 7 | using Microsoft.EntityFrameworkCore.SqlServer.Infrastructure.Internal; 8 | using Microsoft.EntityFrameworkCore.SqlServer.Query.Sql.Internal; 9 | 10 | namespace Microsoft.EntityFrameworkCore.SqlServer.WithNoLock 11 | { 12 | internal sealed class WithNoLockSqlServerQuerySqlGeneratorFactory :SqlServerQuerySqlGeneratorFactory 13 | { 14 | private readonly ISqlServerOptions _sqlServerOptions; 15 | public WithNoLockSqlServerQuerySqlGeneratorFactory(QuerySqlGeneratorDependencies dependencies, ISqlServerOptions sqlServerOptions, INodeTypeProviderFactory nodeTypeProviderFactory) : base(dependencies, sqlServerOptions) 16 | { 17 | _sqlServerOptions = sqlServerOptions; 18 | nodeTypeProviderFactory.RegisterMethods(WithNoLockExpressionNode.SupportedMethods,typeof(WithNoLockExpressionNode)); 19 | } 20 | 21 | public override IQuerySqlGenerator CreateDefault(SelectExpression selectExpression) 22 | { 23 | if (selectExpression == null) 24 | throw new ArgumentNullException(nameof(selectExpression)); 25 | return new WithNoLockSqlServerQuerySqlGenerator( 26 | Dependencies, 27 | selectExpression, 28 | _sqlServerOptions.RowNumberPagingEnabled); 29 | } 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /src/EFCore.SqlServer.WithNoLock/WithNoLockTableExpression.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Text; 4 | using Microsoft.EntityFrameworkCore.Query.Expressions; 5 | using Remotion.Linq.Clauses; 6 | 7 | namespace Microsoft.EntityFrameworkCore.SqlServer.WithNoLock 8 | { 9 | internal class WithNoLockTableExpression: TableExpression 10 | { 11 | public WithNoLockTableExpression(string table, string schema, string alias, IQuerySource querySource) : base(table, schema, alias, querySource) 12 | { 13 | } 14 | 15 | public override bool Equals(object obj) 16 | { 17 | if (obj is null) 18 | { 19 | return false; 20 | } 21 | 22 | if (ReferenceEquals(this, obj)) 23 | { 24 | return true; 25 | } 26 | 27 | return obj.GetType() == GetType() && Equals((WithNoLockTableExpression)obj); 28 | } 29 | 30 | private bool Equals(WithNoLockTableExpression other) 31 | => string.Equals(Table, other.Table) 32 | && string.Equals(Schema, other.Schema) 33 | && string.Equals(Alias, other.Alias) 34 | && Equals(QuerySource, other.QuerySource); 35 | 36 | /// 37 | /// Returns a hash code for this object. 38 | /// 39 | /// 40 | /// A hash code for this object. 41 | /// 42 | public override int GetHashCode() 43 | { 44 | unchecked 45 | { 46 | return (base.GetHashCode() * 397) ^ this.GetType().GetHashCode(); 47 | } 48 | } 49 | public override string ToString() => Table + " " + Alias +" With(nolock)"; 50 | } 51 | } 52 | -------------------------------------------------------------------------------- /test/EFCore.SqlServer.WithNoLock.UnitTest/Category.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Text; 4 | 5 | namespace EFCore.SqlServer.WithNoLock.UnitTest 6 | { 7 | public class Category 8 | { 9 | public int CategoryID { get; set; } 10 | 11 | public string CategoryName { get; set; } 12 | 13 | 14 | 15 | public override string ToString() 16 | { 17 | return $"{nameof(CategoryID)}: {CategoryID}, {nameof(CategoryName)}: {CategoryName}"; 18 | } 19 | } 20 | } 21 | -------------------------------------------------------------------------------- /test/EFCore.SqlServer.WithNoLock.UnitTest/EFCore.SqlServer.WithNoLock.UnitTest.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | netcoreapp2.1 5 | 6 | false 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /test/EFCore.SqlServer.WithNoLock.UnitTest/SampleDbContext.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Data.SqlClient; 4 | using System.Text; 5 | using Microsoft.EntityFrameworkCore; 6 | using Microsoft.EntityFrameworkCore.Diagnostics; 7 | using Microsoft.EntityFrameworkCore.Infrastructure; 8 | using Microsoft.EntityFrameworkCore.Metadata.Builders; 9 | using Microsoft.Extensions.DependencyInjection; 10 | using Microsoft.Extensions.Logging; 11 | using Xunit.Abstractions; 12 | 13 | namespace EFCore.SqlServer.WithNoLock.UnitTest 14 | { 15 | public class SampleDbContext : DbContext 16 | { 17 | 18 | public SampleDbContext() 19 | { 20 | if (LogMessages == null) 21 | { 22 | LogMessages = new List(); 23 | this.GetService().AddProvider(new MyLoggerProvider()); 24 | } 25 | } 26 | 27 | public virtual DbSet Categories { get; set; } 28 | 29 | protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) 30 | { 31 | 32 | var sqlConnectionStringBuilder = new SqlConnectionStringBuilder 33 | { 34 | DataSource = "10.0.2.229", 35 | InitialCatalog = "Heap_Record", 36 | UserID = "sa", 37 | Password = "w1!" 38 | }; 39 | 40 | optionsBuilder.UseSqlServer(sqlConnectionStringBuilder.ConnectionString); 41 | optionsBuilder.EnableSqlServerWithNoLock(); 42 | 43 | base.OnConfiguring(optionsBuilder); 44 | } 45 | 46 | protected override void OnModelCreating(ModelBuilder modelBuilder) 47 | { 48 | 49 | EntityTypeBuilder entityTypeBuilder = modelBuilder.Entity(); 50 | entityTypeBuilder.ToTable("Category"); 51 | entityTypeBuilder.HasKey(e => e.CategoryID); 52 | entityTypeBuilder.Property(e => e.CategoryID); 53 | } 54 | 55 | public override int SaveChanges() 56 | { 57 | LogMessages.Clear(); 58 | 59 | return base.SaveChanges(); 60 | } 61 | public static IList LogMessages; 62 | 63 | private class MyLoggerProvider : ILoggerProvider 64 | { 65 | public ILogger CreateLogger(string categoryName) => new SampleLogger(); 66 | 67 | public void Dispose() { } 68 | 69 | private class SampleLogger : ILogger 70 | { 71 | public bool IsEnabled(LogLevel logLevel) => true; 72 | 73 | public void Log(LogLevel logLevel, EventId eventId, TState state, Exception exception, 74 | Func formatter) 75 | { 76 | if (eventId.Id == RelationalEventId.CommandExecuting.Id) 77 | { 78 | var message = formatter(state, exception); 79 | 80 | LogMessages.Add(message); 81 | 82 | } 83 | } 84 | 85 | public IDisposable BeginScope(TState state) => null; 86 | } 87 | } 88 | } 89 | } 90 | -------------------------------------------------------------------------------- /test/EFCore.SqlServer.WithNoLock.UnitTest/WithNoLock_Test.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using System.Text; 4 | using Microsoft.EntityFrameworkCore.SqlServer.WithNoLock; 5 | using Xunit; 6 | using Xunit.Abstractions; 7 | 8 | namespace EFCore.SqlServer.WithNoLock.UnitTest 9 | { 10 | public class WithNoLock_Test 11 | { 12 | 13 | 14 | [Fact] 15 | public void Query_WithNoLock() 16 | { 17 | using (var dataContext = new SampleDbContext()) 18 | { 19 | var id = 2; 20 | Category entity = dataContext.Categories.WithNoLock().Single(item => item.CategoryID == id); 21 | } 22 | 23 | var sql = DumpSql(); 24 | 25 | 26 | Assert.Contains("FROM [Category] AS [item] With(nolock)",sql); 27 | 28 | } 29 | 30 | [Fact] 31 | public void Query_WithoutNoLock() 32 | { 33 | using (var dataContext = new SampleDbContext()) 34 | { 35 | var id = 2; 36 | Category entity = dataContext.Categories.Single(item => item.CategoryID == id); 37 | } 38 | 39 | var sql = DumpSql(); 40 | 41 | 42 | Assert.DoesNotContain("With(nolock)", sql); 43 | 44 | } 45 | 46 | private static string DumpSql() 47 | { 48 | StringBuilder stringBuilder=new StringBuilder(); 49 | foreach (var logMessage in SampleDbContext.LogMessages) 50 | { 51 | stringBuilder.AppendLine(logMessage); 52 | } 53 | 54 | return stringBuilder.ToString(); 55 | } 56 | } 57 | } --------------------------------------------------------------------------------