使用实体框架4.1执行更新/插入存储的过程

Question

我尝试从实体框架4.1（MVC 3 Web应用程序）调用存储过程。它没有引发例外，但是插入/更新没有发生？当我手动执行存储的proc时，它可以正常工作。

CREATE PROCEDURE [dbo].[SP_AddUpdateResponse]
    @QuestionID int,
    @UserID int,
    @AnswerValue nvarchar(2000),
    @ReviewID int
AS
MERGE [dbo].[Responses] AS [Target]
USING (SELECT @QuestionID, @UserID, @AnswerValue, @ReviewID)
   AS [Source] ([QuestionID], [UserID], [AnswerValue], [ReviewID] )
ON [Target].[QuestionID] = [Source].[QuestionID]
AND [Target].[ReviewID] = [Source].[ReviewID]
WHEN MATCHED THEN
    UPDATE SET [AnswerValue] = [Source].[AnswerValue]
WHEN NOT MATCHED THEN
    INSERT ( [QuestionID], [UserID], [AnswerValue], [ReviewID] )
    VALUES ( [Source].[QuestionID], [Source].[UserID], 
             [Source].[AnswerValue], [Source].[ReviewID] );

调用该过程的代码：

using System.Data.SqlClient;
using System.Data.Metadata.Edm;
using (var db = new NexGenContext())
            {
                foreach (var key in formCollection.AllKeys)
                {
                    var answer = formCollection[key];
                    int questionId = Convert.ToInt32(key);
                    db.Database.SqlQuery<EntityType>(
                        "EXEC SP_AddUpdateResponse @QuestionID, @UserID, @AnswerValue, @ReviewID",
                        new SqlParameter("@QuestionID", questionId),
                        new SqlParameter("@UserID", 9999),
                        new SqlParameter("@AnswerValue", answer),
                        new SqlParameter("@ReviewID", id)
                    );                         
                }
            }

Answer 1

尝试使用ExecuteSqlCommand而不是SqlQuery

db.Database.ExecuteSqlCommand(
                            "EXEC SP_AddUpdateResponse @QuestionID, @UserID, @AnswerValue, @ReviewID",
                            new SqlParameter("@QuestionID", questionId),
                            new SqlParameter("@UserID", 9999),
                            new SqlParameter("@AnswerValue", answer),
                            new SqlParameter("@ReviewID", id)
                        );

在SqlQuery方法的描述中说："使用返回由上下文跟踪的实体的方法"，因此您只能将其用于SELECT查询。