Question

我的C＃ExecuteSqlCommand没有从存储过程返回输出。

我实际上需要最后插入的行Id

这是我的存储过程

ALTER PROCEDURE [dbo].[PatientInsert]
@FirstName nvarchar(Max),
@MiddleName nvarchar(Max),
@LastName nvarchar(Max),
@Gender nvarchar(Max),
@CNICNumber nvarchar(Max),
@DateOfBirth datetime,
@Country nvarchar(max),
@StateOrProvince nvarchar(max),
@City nvarchar(max),
@Address nvarchar(max),
@CellNumber nvarchar(max),
@TelephoneNumber nvarchar(max),
@Email nvarchar(max),
@NOKFirstName nvarchar(max),
@NOKLastName nvarchar(max),
@NOKRelation nvarchar(max),
@NOKCNICNumber nvarchar(max),
@NOKCellNumber nvarchar(max),
@Title int,
@PicturePath nvarchar(max),
@LastCreatedId INT  OUTPUT
AS 
BEGIN 
     SET NOCOUNT ON 

INSERT INTO [dbo].[Patients]
           ([FirstName]
           ,[MiddleName]
           ,[LastName]
           ,[Gender]
           ,[CNICNumber]
           ,[DateOfBirth]
           ,[Country]
           ,[StateOrProvince]
           ,[City]
           ,[Address]
           ,[CellNumber]
           ,[TelephoneNumber]
           ,[Email]
           ,[NOKFirstName]
           ,[NOKLastName]
           ,[NOKRelation]
           ,[NOKCNICNumber]
           ,[NOKCellNumber]
           ,[Title]
           ,[PicturePath])

     VALUES
          (
            @FirstName ,
            @MiddleName ,
            @LastName ,
            @Gender ,
            @CNICNumber ,
            @DateOfBirth,
            @Country ,
            @StateOrProvince ,
            @City ,
            @Address ,
            @CellNumber ,
            @TelephoneNumber ,
            @Email ,
            @NOKFirstName ,
            @NOKLastName ,
            @NOKRelation ,
            @NOKCNICNumber ,
            @NOKCellNumber ,
            @Title,
            @PicturePath
        )

        SELECT @LastCreatedId = SCOPE_IDENTITY()

END

我已经测试了这个存储过程，它在SQL Server Management Studio中运行良好

以下是Stored Procedure Execution Image，因为我使用SCOPE_IDENTITY()并将其作为OUTPUT通过@LastCreatedId

返回

您可以在image数据中看到数据完全插入数据库但在C＃中我可以正确地将数据发送到数据库但不能保留OUTPUT @LastCreatedId数据public int PatientInsert(Patient PatientInstance) { using (var context = new HMContext()) { try { //Int32 LastCreatedId = new Int32(); var returnCode = new SqlParameter("@LastCreatedId", SqlDbType.Int); returnCode.Direction = ParameterDirection.Output; insertRow = context.Database.ExecuteSqlCommand("PatientInsert @FirstName ,@MiddleName," +"@LastName,@Gender,@CNICNumber,@DateOfBirth,@Country,@StateOrProvince,@City," + "@Address,@CellNumber,@TelephoneNumber,@Email,@NOKFirstName,@NOKLastName,@NOKRelation," + "@NOKCNICNumber,@NOKCellNumber,@Title,@PicturePath,@LastCreatedId", new SqlParameter("@FirstName", PatientInstance.FirstName), new SqlParameter("@MiddleName", PatientInstance.MiddleName), new SqlParameter("@LastName", PatientInstance.LastName), new SqlParameter("@Gender", PatientInstance.Gender), new SqlParameter("@CNICNumber", PatientInstance.CNICNumber), new SqlParameter("@DateOfBirth", PatientInstance.DateOfBirth.Value.ToShortDateString()), new SqlParameter("@Country", PatientInstance.Country), new SqlParameter("@StateOrProvince", PatientInstance.StateOrProvince), new SqlParameter("@City", PatientInstance.City), new SqlParameter("@Address", PatientInstance.Address), new SqlParameter("@CellNumber", PatientInstance.CellNumber), new SqlParameter("@TelephoneNumber", PatientInstance.TelephoneNumber), new SqlParameter("@Email", PatientInstance.Email), new SqlParameter("@NOKFirstName", PatientInstance.NOKFirstName), new SqlParameter("@NOKLastName", PatientInstance.NOKLastName), new SqlParameter("@NOKRelation", PatientInstance.NOKRelation), new SqlParameter("@NOKCNICNumber", PatientInstance.NOKCNICNumber), new SqlParameter("@NOKCellNumber", PatientInstance.NOKCellNumber), new SqlParameter("@Title", PatientInstance.Title.ToString()), new SqlParameter("@PicturePath", (PatientInstance.PicturePath==null?"":PatientInstance.PicturePath)), returnCode ); return (int)returnCode.Value; } catch (Exception exp) { var me = exp.Message; return -1; } } }

这是我使用此存储过程的C＃代码

{}

我从returnCode.Value获得Specified cast is not valid.值如果我尝试将其转换为整数，它会给我异常@LastCreatedId

如何从存储过程中检索glFramebufferTexture2D( myfboID, GL_FRAMEBUFFER, GL_TEXTURE_2D, mytexID, 0);的值作为OUTPUT值

Answer 1

添加

SELECT @LastCreatedId = CAST(SCOPE_IDENTITY() as int)

存储过程中的

..还要使用下面的强制转换操作检查它是否包含int值

if (returnCode.Value != DBNull.Value) 
return Convert.ToInt32(returnCode.Value);

Answer 2

由于您基本上是尝试通过SCOPE_IDENTITY（）获取ID，为什么不尝试使用：。

执行查询，并返回查询返回的结果集中第一行的第一列。其他列或行将被忽略。

我从下面的帖子中得到了答案： ExecuteScalar()

干杯！

Answer 3

我遇到了同样的问题，尝试在ExecuteSQLCommand调用中提到参数之后添加单词OUTPUT

context.Database.ExecuteSqlCommand("...,@LastCreatedId OUTPUT",...

您的完整代码如下：

public int PatientInsert(Patient PatientInstance)
    {
        using (var context = new HMContext())
        {
            try
            {

                //Int32 LastCreatedId = new Int32();

                var returnCode = new SqlParameter("@LastCreatedId", SqlDbType.Int);
                returnCode.Direction = ParameterDirection.Output;

                insertRow =
                context.Database.ExecuteSqlCommand("PatientInsert @FirstName ,@MiddleName,"
                +"@LastName,@Gender,@CNICNumber,@DateOfBirth,@Country,@StateOrProvince,@City,"
                + "@Address,@CellNumber,@TelephoneNumber,@Email,@NOKFirstName,@NOKLastName,@NOKRelation,"
                + "@NOKCNICNumber,@NOKCellNumber,@Title,@PicturePath,@LastCreatedId OUTPUT",
                new SqlParameter("@FirstName", PatientInstance.FirstName),
                new SqlParameter("@MiddleName", PatientInstance.MiddleName),
                new SqlParameter("@LastName", PatientInstance.LastName),
                new SqlParameter("@Gender", PatientInstance.Gender),
                new SqlParameter("@CNICNumber", PatientInstance.CNICNumber),
                new SqlParameter("@DateOfBirth", PatientInstance.DateOfBirth.Value.ToShortDateString()),
                new SqlParameter("@Country", PatientInstance.Country),
                new SqlParameter("@StateOrProvince", PatientInstance.StateOrProvince),
                new SqlParameter("@City", PatientInstance.City),
                new SqlParameter("@Address", PatientInstance.Address),
                new SqlParameter("@CellNumber", PatientInstance.CellNumber),
                new SqlParameter("@TelephoneNumber", PatientInstance.TelephoneNumber),
                new SqlParameter("@Email", PatientInstance.Email),
                new SqlParameter("@NOKFirstName", PatientInstance.NOKFirstName),
                new SqlParameter("@NOKLastName", PatientInstance.NOKLastName),
                new SqlParameter("@NOKRelation", PatientInstance.NOKRelation),
                new SqlParameter("@NOKCNICNumber", PatientInstance.NOKCNICNumber),
                new SqlParameter("@NOKCellNumber", PatientInstance.NOKCellNumber),
                new SqlParameter("@Title", PatientInstance.Title.ToString()),
                new SqlParameter("@PicturePath", (PatientInstance.PicturePath==null?"":PatientInstance.PicturePath)),
                returnCode
                );
                return (int)returnCode.Value;
            }
            catch (Exception exp)
            {
                var me = exp.Message;
                return -1;
            }
        }
    }

C＃ExecuteSqlCommand未从存储过程返回输出

3 个答案: