执行 DbCommand 失败。.NET核心

Question

在创建我的第一个页面期间，我注意到我无法从 cmd 运行 .Net。我不知道到底是什么问题。我正在向您发送命令行。

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我查了一些网站的解决方案。这个解决方案没有帮助我。

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C:\\Users\\prywatny\\Desktop\\ProjektodZera\\BigProject\\BigProject>dotnet ef 数据库更新\n完成。

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C:\\Users\\prywatny\\Desktop\\ProjektodZera\\BigProject\\BigProject>dotnet run\nU\xc5\xbcywanie ustawie\xc5\x84 uruchamiania z profilu C:\\Users\\prywatny\\Desktop\\ ProjektodZera\\BigProject\\BigProject\\Properties\\launchSettings.json...

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fail: Microsoft.EntityFrameworkCore.Database.Command[20102]\n      Failed executing DbCommand (133ms) [Parameters=[@__normalizedEmail_0='?' (Size = 256)], CommandType='Text', CommandTimeout='30']\n      SELECT TOP(1) [u].[Id], [u].[AccessFailedCount], [u].[ConcurrencyStamp], [u].[Email], [u].[EmailConfirmed], [u].[FirstName], [u].[LastName], [u].[LockoutEnabled], [u].[LockoutEnd], [u].[NormalizedEmail], [u].[NormalizedUserName], [u].[PasswordHash], [u].[PhoneNumber], [u].[PhoneNumberConfirmed], [u].[SecurityStamp], [u].[TwoFactorEnabled], [u].[UserName]\n      FROM [AspNetUsers] AS [u]\n      WHERE [u].[NormalizedEmail] = @__normalizedEmail_0\nSystem.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AspNetUsers'.\n   at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__122_0(Task`1 result)\n   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()\n   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)\n--- End of stack trace from previous location where exception was thrown ---\n   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)\n--- End of stack trace from previous location where exception was thrown ---\n   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteAsync(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues, CancellationToken cancellationToken)\nClientConnectionId:68090395-2d00-4ce7-9f2b-0ed6813b9694\nError Number:208,State:1,Class:16\nfail: Microsoft.EntityFrameworkCore.Query[10100]\n      An exception occurred in the database while iterating the results of a query for context type 'BigProject.Data.Context'.\n      System.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AspNetUsers'.\n         at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__122_0(Task`1 result)\n         at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()\n         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)\n      --- End of stack trace from previous location where exception was thrown ---\n         at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)\n      --- End of stack trace from previous location where exception was thrown ---\n         at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteAsync(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 para\nUnhandled Exception: meterValues, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.BufferlessMoveNext(DbContext _, Boolean buffer, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.MoveNext(CancellationToken cancellationToken)\n         at System.Linq.AsyncEnumerable.FirstOrDefault_[TSource](IAsyncEnumerable`1 source, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.TaskResultAsyncEnumerable`1.Enumerator.MoveNext(CancellationToken cancellationToken)\n         at System.Linq.AsyncEnumerable.SelectEnumerableAsyncIterator`2.MoveNextCore(CancellationToken cancellationToken)\n         at System.Linq.AsyncEnumerable.AsyncIterator`1.MoveNext(CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext(CancellationToken cancellationToken)\n      ClientConnectionId:68090395-2d00-4ce7-9f2b-0ed6813b9694\n      Error Number:208,State:1,Class:16\nSystem.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AspNetUsers'.\n   at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__122_0(Task`1 result)\n   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()\n   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)\n--- End of stack trace from previous location where exception was thrown ---\n   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)\n--- End of stack trace from previous location where exception was thrown ---\n   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteAsync(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.BufferlessMoveNext(DbContext _, Boolean buffer, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.MoveNext(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.FirstOrDefault_[TSource](IAsyncEnumerable`1 source, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.TaskResultAsyncEnumerable`1.Enumerator.MoveNext(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.SelectEnumerableAsyncIterator`2.MoveNextCore(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.AsyncIterator`1.MoveNext(CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext(CancellationToken cancellationToken)\nClientConnectionId:68090395-2d00-4ce7-9f2b-0ed6813b9694\nError Number:208,State:1,Class:16\nSystem.AggregateException: One or more errors occurred. (Invalid object name 'AspNetUsers'.) ---> System.Data.SqlClient.SqlException: Invalid object name 'AspNetUsers'.\n   at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__122_0(Task`1 result)\n   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()\n   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)\n--- End of stack trace from previous location where exception was thrown ---\n   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)\n--- End of stack trace from previous location where exception was thrown ---\n   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteAsync(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.BufferlessMoveNext(DbContext _, Boolean buffer, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.MoveNext(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.FirstOrDefault_[TSource](IAsyncEnumerable`1 source, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.TaskResultAsyncEnumerable`1.Enumerator.MoveNext(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.SelectEnumerableAsyncIterator`2.MoveNextCore(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.AsyncIterator`1.MoveNext(CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext(CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteSingletonAsyncQuery[TResult](QueryContext queryContext, Func`2 compiledQuery, IDiagnosticsLogger`1 logger, Type contextType)\n   at Microsoft.AspNetCore.Identity.UserManager`1.FindByEmailAsync(String email)\n   at BigProject.Data.Seeder.SeedAsync() in C:\\Users\\prywatny\\Desktop\\ProjektodZera\\BigProject\\BigProject\\Data\\Seeder.cs:line 32\n   --- End of inner exception stack trace ---\n   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)\n   at System.Threading.Tasks.Task.Wait()\n   at BigProject.Program.SeedDb(IWebHost host) in C:\\Users\\prywatny\\Desktop\\ProjektodZera\\BigProject\\BigProject\\Program.cs:line 32\n   at BigProject.Program.Main(String[] args) in C:\\Users\\prywatny\\Desktop\\ProjektodZera\\BigProject\\BigProject\\Program.cs:line 22\nfail: Microsoft.EntityFrameworkCore.Query[10100]\n      An exception occurred in the database while iterating the results of a query for context type 'BigProject.Data.Context'.\n      System.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AspNetUsers'.\n         at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__122_0(Task`1 result)\n         at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()\n         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)\n      --- End of stack trace from previous location where exception was thrown ---\n         at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)\n      --- End of stack trace from previous location where exception was thrown ---\n         at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteAsync(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.BufferlessMoveNext(DbContext _, Boolean buffer, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.MoveNext(CancellationToken cancellationToken)\n         at System.Linq.AsyncEnumerable.FirstOrDefault_[TSource](IAsyncEnumerable`1 source, CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.TaskResultAsyncEnumerable`1.Enumerator.MoveNext(CancellationToken cancellationToken)\n         at System.Linq.AsyncEnumerable.SelectEnumerableAsyncIterator`2.MoveNextCore(CancellationToken cancellationToken)\n         at System.Linq.AsyncEnumerable.AsyncIterator`1.MoveNext(CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext(CancellationToken cancellationToken)\n         at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteSingletonAsyncQuery[TResult](QueryContext queryContext, Func`2 compiledQuery, IDiagnosticsLogger`1 logger, Type contextType)\n      ClientConnectionId:68090395-2d00-4ce7-9f2b-0ed6813b9694\n      Error Number:208,State:1,Class:16\nSystem.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AspNetUsers'.\n   at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__122_0(Task`1 result)\n   at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()\n   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)\n--- End of stack trace from previous location where exception was thrown ---\n   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)\n--- End of stack trace from previous location where exception was thrown ---\n   at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteAsync(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.BufferlessMoveNext(DbContext _, Boolean buffer, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable`1.AsyncEnumerator.MoveNext(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.FirstOrDefault_[TSource](IAsyncEnumerable`1 source, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.TaskResultAsyncEnumerable`1.Enumerator.MoveNext(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.SelectEnumerableAsyncIterator`2.MoveNextCore(CancellationToken cancellationToken)\n   at System.Linq.AsyncEnumerable.AsyncIterator`1.MoveNext(CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext(CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteSingletonAsyncQuery[TResult](QueryContext queryContext, Func`2 compiledQuery, IDiagnosticsLogger`1 logger, Type contextType)\nClientConnectionId:68090395-2d00-4ce7-9f2b-0ed6813b9694\nError Number:208,State:1,Class:16\n

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C:\\Users\\prywatny\\Desktop\\ProjektodZera\\BigProject\\BigProject>

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谢谢你的帮助。

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Answer 1

尽管这些大错误消息有时很难阅读，但您发布的堆栈跟踪顶部的错误非常清楚：

fail: Microsoft.EntityFrameworkCore.Database.Command[20102]
      Failed executing DbCommand (133ms) [Parameters=[@__normalizedEmail_0='?' (Size = 256)], CommandType='Text', CommandTimeout='30']
      SELECT TOP(1) [u].[Id], [u].[AccessFailedCount], [u].[ConcurrencyStamp], [u].[Email], [u].[EmailConfirmed], [u].[FirstName], [u].[LastName], [u].[LockoutEnabled], [u].[LockoutEnd], [u].[NormalizedEmail], [u].[NormalizedUserName], [u].[PasswordHash], [u].[PhoneNumber], [u].[PhoneNumberConfirmed], [u].[SecurityStamp], [u].[TwoFactorEnabled], [u].[UserName]
      FROM [AspNetUsers] AS [u]
      WHERE [u].[NormalizedEmail] = @__normalizedEmail_0
System.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AspNetUsers'.

所以系统正在尝试运行查询：

 SELECT TOP(1) [u].[Id], [u].[AccessFailedCount], [u].[ConcurrencyStamp], [u].[Email], [u].[EmailConfirmed], [u].[FirstName], [u].[LastName], [u].[LockoutEnabled], [u].[LockoutEnd], [u].[NormalizedEmail], [u].[NormalizedUserName], [u].[PasswordHash], [u].[PhoneNumber], [u].[PhoneNumberConfirmed], [u].[SecurityStamp], [u].[TwoFactorEnabled], [u].[UserName]
      FROM [AspNetUsers] AS [u]
      WHERE [u].[NormalizedEmail] = @__normalizedEmail_0

并收到错误：

System.Data.SqlClient.SqlException (0x80131904): Invalid object name 'AspNetUsers'.

您应该检查该表是否存在以及您使用的用户帐户是否有权访问该表。您甚至可以尝试自己从 SQL Management Studio 运行查询，看看会发生什么