插入时从 SQL Server 获取 SCOPE_IDENTITY

发布于 2024-10-16 02:23:04 字数 1096 浏览 5 评论 0原文

我想已经太晚了,我太累了,看不到自己做错了什么。这是我正在尝试的:

int imageId = imageDal.AddImage(new SqlParameter[]
        {
            new SqlParameter("@IMAGE_ID", 
        SqlDbType.Int, Int32.MaxValue, ParameterDirection.Output,
        true, 0, 0,"IMAGE_ID", DataRowVersion.Current,DBNull.Value),

        new SqlParameter("@IMAGE", 
        SqlDbType.Image, 11, ParameterDirection.Input,
        true, 0, 0,"IMAGE", DataRowVersion.Current,image)
        });

public int AddImage(SqlParameter[] spParams)
{
    SqlHelper.ExecuteNonQuery(BaseDAL.ConnectionStringImages, INSERT_IMAGE_SQL, spParams);
    return Convert.ToInt32(spParams[0].Value);
}

存储过程:

[dbo].[sp_insert_image]
    -- Add the parameters for the stored procedure here
    @IMAGE_ID int OUT,
    @IMAGE image
AS
BEGIN
    INSERT INTO images
    (IMAGE)
    VALUES
    (@IMAGE)
    SELECT @IMAGE_ID = SCOPE_IDENTITY();
END
GO

我得到 DBNull 作为 spParams[0].Value。我尝试将 @IMAGE_ID 的值设置为我的存储过程中的常量,但它没有改变任何内容,因此问题不在于我的存储过程(这就是我的想法)。

当我从 sql management studio 执行该过程时,我看到 insert_id 返回。

I guess it is too late and I'm too tired to see what I'm doing wrong. Here is what I'm trying:

int imageId = imageDal.AddImage(new SqlParameter[]
        {
            new SqlParameter("@IMAGE_ID", 
        SqlDbType.Int, Int32.MaxValue, ParameterDirection.Output,
        true, 0, 0,"IMAGE_ID", DataRowVersion.Current,DBNull.Value),

        new SqlParameter("@IMAGE", 
        SqlDbType.Image, 11, ParameterDirection.Input,
        true, 0, 0,"IMAGE", DataRowVersion.Current,image)
        });

public int AddImage(SqlParameter[] spParams)
{
    SqlHelper.ExecuteNonQuery(BaseDAL.ConnectionStringImages, INSERT_IMAGE_SQL, spParams);
    return Convert.ToInt32(spParams[0].Value);
}

Stored Procedure:

[dbo].[sp_insert_image]
    -- Add the parameters for the stored procedure here
    @IMAGE_ID int OUT,
    @IMAGE image
AS
BEGIN
    INSERT INTO images
    (IMAGE)
    VALUES
    (@IMAGE)
    SELECT @IMAGE_ID = SCOPE_IDENTITY();
END
GO

I get DBNull as spParams[0].Value. I've tried setting value of @IMAGE_ID to a constant in my stored procedure yet it didn't change anything so the problem isn't with my stored procedure (that is what I think).

When I execute the procedure from sql management studio, I see the inserted_id returning..

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评论(3

玩心态 2024-10-23 02:23:04

我最终得到了executescalar 并直接从SP 返回SCOPE_IDENTITY()

如果有另一种方法可以做到这一点并从 sqlparameter 中获取值,我很想听听。

I ended up with executescalar and returning the SCOPE_IDENTITY() directly from SP.

If there is another way of doing it and getting the value from the sqlparameter, I'd love to hear that out.

淡淡绿茶香 2024-10-23 02:23:04

我想,问题出在 ExecuteNonQuery 方法中。它返回对象数组,而不是 sqlparam 的数组。

只需在输出 sqlparam 对象上有一个引用,然后从该引用中获取值即可。

祝你好运!

PS还有另一种解决方案。检查链接

http://www.dotnetmonster.com/Uwe/Forum.aspx/dotnet-distributed-apps/160/Data-Access-Application-Block-Output-Parameters

I suppose, the problem is in ExecuteNonQuery method. It returns object array, instead of sqlparam's array.

Just have a ref on the output sqlparam object and get the value from that ref.

Good Luck!

P.S. There's another solution. Check the link

http://www.dotnetmonster.com/Uwe/Forum.aspx/dotnet-distributed-apps/160/Data-Access-Application-Block-Output-Parameters

柠檬 2024-10-23 02:23:04

你这样放......

[dbo].[sp_insert_image]
    -- Add the parameters for the stored procedure here
    @IMAGE_ID int OUT,
    @IMAGE image
AS
BEGIN
    INSERT INTO images (IMAGE) VALUES (@IMAGE)
    SET @IMAGE_ID  = SCOPE_IDENTITY();
END
GO

You put Like this....

[dbo].[sp_insert_image]
    -- Add the parameters for the stored procedure here
    @IMAGE_ID int OUT,
    @IMAGE image
AS
BEGIN
    INSERT INTO images (IMAGE) VALUES (@IMAGE)
    SET @IMAGE_ID  = SCOPE_IDENTITY();
END
GO
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