EF core2.1+MySQL报错'Void Microsoft.EntityFrameworkCore.Storage.Internal.RelationalParameterBuilder..ctor(Microsoft.EntityFrameworkCore.Storage.IRelationalTypeMapper)

一、使用.net core 2.0 EF mysql 运行一直报错如下：

　

An unhandled exception occurred while processing the request.

MissingMethodException: Method not found: 'Void Microsoft.EntityFrameworkCore.Storage.Internal.RelationalParameterBuilder..ctor(Microsoft.EntityFrameworkCore.Storage.IRelationalTypeMapper)'.

Microsoft.EntityFrameworkCore.Storage.Internal.MySqlCommandBuilder..ctor(IDiagnosticsLogger<Command> logger, IRelationalTypeMapper typeMapper)

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• MissingMethodException: Method not found: 'Void Microsoft.EntityFrameworkCore.Storage.Internal.RelationalParameterBuilder..ctor(Microsoft.EntityFrameworkCore.Storage.IRelationalTypeMapper)'.

  • Microsoft.EntityFrameworkCore.Storage.Internal.MySqlCommandBuilder..ctor(IDiagnosticsLogger<Command> logger, IRelationalTypeMapper typeMapper)

  • Microsoft.EntityFrameworkCore.Storage.Internal.MySqlCommandBuilderFactory.CreateCore(IDiagnosticsLogger<Command> logger, IRelationalTypeMapper relationalTypeMapper)

  • Microsoft.EntityFrameworkCore.Query.Sql.DefaultQuerySqlGenerator.GenerateSql(IReadOnlyDictionary<string, object> parameterValues)

  • Microsoft.EntityFrameworkCore.Query.Internal.ShaperCommandContext.GetRelationalCommand(IReadOnlyDictionary<string, object> parameters)

  • Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable+Enumerator.BufferlessMoveNext(DbContext _, bool buffer)

  • Microsoft.EntityFrameworkCore.Storage.Internal.MySqlExecutionStrategy.Execute<TState, TResult>(TState state, Func<DbContext, TState, TResult> operation, Func<DbContext, TState, ExecutionResult<TResult>> verifySucceeded)

  • Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable+Enumerator.MoveNext()

  • Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider+<_TrackEntities>d__17.MoveNext()

  • Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider+ExceptionInterceptor+EnumeratorExceptionInterceptor.MoveNext()

  • System.Collections.Generic.List.AddEnumerable(IEnumerable<T> enumerable)

  • System.Linq.Enumerable.ToList<TSource>(IEnumerable<TSource> source)

  • GP.Core.WebAPI.Controllers.ValuesController.Get() in ValuesController.cs

    -
    60. //return query;
    61. }
    62. return "";
    63. }
    64. catch (Exception ex)
    65. {

    66. throw;

    67. }
    68. //return new string[] { "value1", "value2" };
    69. }
    71. // GET api/values/5
    72. [HttpGet("{id}")]

  • lambda_method(Closure , object , Object[] )

  • Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(object target, Object[] parameters)

  • Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+<InvokeActionMethodAsync>d__12.MoveNext()

  • System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

  • System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

  • Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+<InvokeNextActionFilterAsync>d__10.MoveNext()

  • System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

  • Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ActionExecutedContext context)

  • Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+<InvokeInnerFilterAsync>d__14.MoveNext()

  • System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

  • System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

  • Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker+<InvokeNextResourceFilter>d__22.MoveNext()

  • System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

  • Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)

  • Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker+<InvokeFilterPipelineAsync>d__17.MoveNext()

  • System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

  • System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

  • Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker+<InvokeAsync>d__15.MoveNext()

  • System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

  • System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

  • Microsoft.AspNetCore.Builder.RouterMiddleware+<Invoke>d__4.MoveNext()

  • System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

  • System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

  • Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware+<Invoke>d__7.MoveNext()

• 
  
  Show raw exception details

  System.MissingMethodException: Method not found: 'Void Microsoft.EntityFrameworkCore.Storage.Internal.RelationalParameterBuilder..ctor(Microsoft.EntityFrameworkCore.Storage.IRelationalTypeMapper)'.
     at Microsoft.EntityFrameworkCore.Storage.Internal.MySqlCommandBuilder..ctor(IDiagnosticsLogger`1 logger, IRelationalTypeMapper typeMapper)
     at Microsoft.EntityFrameworkCore.Storage.Internal.MySqlCommandBuilderFactory.CreateCore(IDiagnosticsLogger`1 logger, IRelationalTypeMapper relationalTypeMapper)
     at Microsoft.EntityFrameworkCore.Query.Sql.DefaultQuerySqlGenerator.GenerateSql(IReadOnlyDictionary`2 parameterValues)
     at Microsoft.EntityFrameworkCore.Query.Internal.ShaperCommandContext.GetRelationalCommand(IReadOnlyDictionary`2 parameters)
     at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.BufferlessMoveNext(DbContext _, Boolean buffer)
     at Microsoft.EntityFrameworkCore.Storage.Internal.MySqlExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
     at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.MoveNext()
     at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.<_TrackEntities>d__17`2.MoveNext()
     at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext()
     at System.Collections.Generic.List`1.AddEnumerable(IEnumerable`1 enumerable)
     at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
     at GP.Core.WebAPI.Controllers.ValuesController.Get() in E:WorkGraingerProjectGP.Core.WebAPIControllersValuesController.cs:line 66
     at lambda_method(Closure , Object , Object[] )
     at Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(Object target, Object[] parameters)
     at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeActionMethodAsync>d__12.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
     at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
     at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
     at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextActionFilterAsync>d__10.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
     at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
     at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ActionExecutedContext context)
     at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
     at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeInnerFilterAsync>d__14.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
     at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
     at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
     at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeNextResourceFilter>d__22.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
     at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
     at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)
     at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
     at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeFilterPipelineAsync>d__17.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
     at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
     at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
     at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeAsync>d__15.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
     at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
     at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
     at Microsoft.AspNetCore.Builder.RouterMiddleware.<Invoke>d__4.MoveNext()
  --- End of stack trace from previous location where exception was thrown ---
     at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
     at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
     at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()

二、项目包如下：

　　

三、考虑到可能是包版本问题，也尝试升级为.net core 2.1，依然没有解决。后面统一降级到2.0解决了。

　　

四、示例：右键编辑项目testmysql.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.1" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.0.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.0.0" />
    <PackageReference Include="MySql.Data.EntityFrameworkCore" Version="8.0.11" />
    <PackageReference Include="MySql.Data.EntityFrameworkCore.Design" Version="8.0.11" />
  </ItemGroup>

</Project>