データリーダーが指定されたIAPD_DBModel.Table_Priceと互換性がありません

Question

私は、ASP.NET Web API 2およびEntity Frameworkを使用してデータベースにアクセスするWeb APIを開発しています。私は取得していますエラーを

Namespace Controllers 
    Public Class NationalityController 
    Inherits ApiController 


    Public Function getcountries() As IHttpActionResult 
     Using entities As IAPD_DBEntities = New IAPD_DBEntities() 
      Return Ok(entities.getnationalities.ToList) 
     End Using 
    End Function 
End Class 
End Namespace 

とここにある：

SET ANSI_NULLS ON 
SET QUOTED_IDENTIFIER ON 
GO 

ALTER PROCEDURE [dbo].[getnationalities] 
AS 
BEGIN 
    SET NOCOUNT ON; 

    SELECT DISTINCT 
     Table_Price.Price_Nationality AS 'name' 
    FROM 
     Table_Price; 
END 

をし、ここに私のVBのコードです：私は私のSQL Serverは非常に簡単で、次のように1列を返すすべきストアドプロシージャを呼び出します郵便配達員から、私は本当にターゲットに何

は

{ 
    "message": "An error has occurred.", 
    "exceptionMessage": "The data reader is incompatible with the specified 'IAPD_DBModel.Table_Price'. A member of the type, 'Price_PK_ID', does not have a 
corresponding column in the data reader with the same name.", 
"exceptionType": "System.Data.Entity.Core.EntityCommandExecutionException", 
"stackTrace": " at System.Data.Entity.Core.Query.InternalTrees.ColumnMapFactory.GetMemberOrdinalFromReader(DbDataReader storeDataReader, EdmMember member, EdmType currentType, Dictionary`2 renameList)\r\n at System.Data.Entity.Core.Query.InternalTrees.ColumnMapFactory.GetColumnMapsForType(DbDataReader storeDataReader, EdmType edmType, Dictionary`2 renameList)\r\n at System.Data.Entity.Core.Query.InternalTrees.ColumnMapFactory.CreateColumnMapFromReaderAndType(DbDataReader storeDataReader, EdmType edmType, EntitySet entitySet, Dictionary`2 renameList)\r\n at System.Data.Entity.Core.Query.InternalTrees.ColumnMapFactory.CreateFunctionImportStructuralTypeColumnMap(DbDataReader storeDataReader, FunctionImportMappingNonComposable mapping, Int32 resultSetIndex, EntitySet entitySet, StructuralType baseStructuralType)\r\n at System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.FunctionColumnMapGenerator.System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.IColumnMapGenerator.CreateColumnMap(DbDataReader reader)\r\n at System.Data.Entity.Core.Objects.ObjectContext.MaterializedDataRecord[TElement](EntityCommand entityCommand, DbDataReader storeReader, Int32 resultSetIndex, ReadOnlyCollection`1 entitySets, EdmType[] edmTypes, ShaperFactory`1 shaperFactory, MergeOption mergeOption, Boolean streaming)\r\n at System.Data.Entity.Core.Objects.ObjectContext.CreateFunctionObjectResult[TElement](EntityCommand entityCommand, ReadOnlyCollection`1 entitySets, EdmType[] edmTypes, ExecutionOptions executionOptions)\r\n at System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass47`1.<ExecuteFunction>b__46()\r\n at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)\r\n at System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass47`1.<ExecuteFunction>b__45()\r\n at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)\r\n at System.Data.Entity.Core.Objects.ObjectContext.ExecuteFunction[TElement](String functionName, ExecutionOptions executionOptions, ObjectParameter[] parameters)\r\n at ProjectDataAccess.IAPD_DBEntities.getnationalities() in C:\\Users\\Junaida\\documents\\visual studio 2015\\Projects\\WebApplication7\\ProjectDataAccess\\DataAccessModel.Context.vb:line 5552\r\n at WebApplication7.Controllers.NationalityController.getcountries() in C:\\Users\\Junaida\\documents\\visual studio 2015\\Projects\\WebApplication7\\WebApplication7\\Controllers\\NationalityController.vb:line 13\r\n at lambda_method(Closure , Object , Object[])\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.AuthenticationFilterResult.<ExecuteAsync>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()" 
} 

国籍のデータセットまたは配列を取得することです

Answer 1

申し訳ありませんが、Entity Frameworkはわかりませんが、ストアドプロシージャからデータのリストを取得できます。

Dim lstNationalities As New List(Of String) 
     Using cn As New SqlClient.SqlConnection("Your connection string") 
      Using cmd As New SqlClient.SqlCommand With { 
       .Connection = cn, 
       .CommandType = CommandType.StoredProcedure, 
       .CommandText = "getnationalities"} 
       cn.Open 
       Using dr As SqlClient.SqlDataReader = cmd.ExecuteReader 
        Do While dr.Read 
         lstNationalities.Add(dr.GetString(0)) 
        Loop 
       End Using 
      End Using 
     End Using