C# 存储过程插入或更新 DataTable 问题？

Posted 2023-04-12

【中文标题】C# 存储过程插入或更新 DataTable 问题？

【英文标题】：C# stored procedure insert or update with DataTable problem?

【发布时间】：2021-07-30 23:09:51

【问题描述】：

我想用下面的代码添加或更新。我收到以下错误。我应该如何编辑这段代码？

必须声明标量变量“@UyeID”。 关键字“ELSE”附近的语法不正确。

我的代码：

CREATE TYPE [dbo].[BcgTarihiType] AS TABLE
(
    [UyeID] int NOT NULL,
    [BcgTarihi] [nvarchar](30) NULL
)
GO

CREATE PROCEDURE Insert_BcgTarihleri
    (@tblBcgTarihleri BcgTarihiType READONLY)
AS            
BEGIN                
    IF EXISTS (SELECT 1 FROM BcgTarihleri 
               WHERE UyeID = @UyeID AND BcgTarihi = @BcgTarihi)
    BEGIN                     
        UPDATE BcgTarihleri 
        SET UyeID = @UyeID, BcgTarihi = @BcgTarihi 
        WHERE UyeID = @UyeID                        
    END
    ELSE
    BEGIN
        INSERT INTO BcgTarihleri 
        VALUES (@UyeID, @BcgTarihi)
    END
END 

我也想这样问。下面的代码有效，但我只能添加。如果存在数据，如何更新？

CREATE TYPE [dbo].[BcgTarihiType] AS TABLE(
    [UyeID] int NOT NULL,
    [BcgTarihi] [nvarchar](30) NULL
)    
GO
CREATE PROCEDURE Insert_BcgTarihleri
(                
    @tblBcgTarihleri BcgTarihiType READONLY
)
AS            
BEGIN               
    INSERT into BcgTarihleri (UyeID,BcgTarihi)
    SELECT UyeID, BcgTarihi FROM @tblBcgTarihleri;    
END  

【问题讨论】：

您没有在给定的代码中声明变量@UyeID。也许您想将参数 @UyeID 带入您的过程 Insert_BcgTarihleri？

这次我将它添加到代码中时出现此错误。 '过程或函数'Insert_BcgTarihleri'需要参数'@UyeID'，但未提供。'

因为在调用Insert_BcgTarihleri时，需要传递参数@UyeID

我将它作为数据表传递？ cmd.Parameters.AddWithValue (@tblBcgTarihleri, 数据表);

向我们展示您的 C# 代码和don't use AddWithValue。并且要更新，要么在 id 退出时添加更新，要么使用合并语句。

【参考方案1】：

@Boris Makhlin，@Dale K 感谢您的帮助，我用下面的代码解决了我的问题

CREATE TYPE [dbo].[BcgTarihiType] AS TABLE(
            [UyeID] int NOT NULL,
            [BcgTarihi] [nvarchar](30) NULL
        )    
        GO            
        CREATE PROCEDURE [dbo].[Update_BcgTarihleri]
              @tblBcgTarihleri BcgTarihiType READONLY
        AS
        BEGIN
              SET NOCOUNT ON;

              MERGE INTO BcgTarihleri b1
              USING @tblBcgTarihleri b2
              ON b1.UyeID = b2.UyeID AND b1.BcgTarihi = b2.BcgTarihi
              WHEN MATCHED THEN
              UPDATE SET b1.UyeID = b2.UyeID
                    ,b1.BcgTarihi = b2.BcgTarihi
              WHEN NOT MATCHED THEN
              INSERT VALUES(b2.UyeID, b2.BcgTarihi);
        END