C# 表类型的游标不工作

这是我的光标

将表类型传递给游标以更新表列

DECLARE cur CURSOR FOR SELECT * FROM @AutoDataType 
OPEN cur    
FETCH NEXT FROM cur INTO @Customer_Id,@First_Name
WHILE @@FETCH_STATUS = 0 
BEGIN           
  UPDATE [dbo].[ABC] SET [Customer_Id] =@Customer_Id            
  WHERE LOWER([PH_FirstName])=LOWER(@First_Name)                    
  FETCH NEXT FROM cur INTO @Customer_Id,@First_Name
END
CLOSE cur    
DEALLOCATE cur

当我试图从下面的查询窗口执行这个游标时，它工作得很好

Declare @AutoDataType As [dbo].[Auto_DataType]
Insert Into @AutoDataType(Customer_Id,First_Name) Values('11111','JOHN');
Exec sp_TEST @AutoDataType

但是通过C#代码它不工作，也没有错误

我做错了什么

这是我的桌子类型：

CREATE TYPE [dbo].[Auto_DataType] AS TABLE([Customer_Id] [varchar](50) NULL,
                                           [First_Name] [varchar](50) NULL)

以下是我的存储过程：

CREATE PROCEDURE [dbo].[sp_TEST](@AutoDataType As [dbo].[Auto_DataType] Readonly)
AS
Begin
DECLARE @Row_Id Int;
DECLARE @Customer_Id Varchar(50);
DECLARE @First_Name Varchar(50);
DECLARE @Last_Name Varchar(50);
DECLARE @DOB Varchar(50);
DECLARE @License_Number Varchar(50);
DECLARE @TransId VARCHAR(50);   
DECLARE @TimeStamp DATETIME;    
DECLARE cur CURSOR FOR SELECT * FROM @AutoDataType 
OPEN cur    
FETCH NEXT FROM cur INTO @Customer_Id,@First_Name
WHILE @@FETCH_STATUS = 0 
    BEGIN           
        UPDATE [dbo].[ABC] SET [Customer_Id]  =@Customer_Id            
        WHERE LOWER([PH_FirstName])=LOWER(@First_Name)   
        FETCH NEXT FROM cur INTO @Customer_Id,@First_Name
    END
CLOSE cur    
DEALLOCATE cur  
End

---

这里根本不需要光标。这应该是一个update语句

UPDATE a SET [Customer_Id] = adt.Customer_Id            
FROM @AutoDataType adt
JOIN [dbo].[ABC] a on a.PH_FirstName = adt.First_Name
WHERE LOWER(a.[PH_FirstName]) = LOWER(adt.First_Name)   

---

请注意，除非您有区分大小写的排序规则，否则此处的where谓词毫无意义。就像在代码中一样，它将更新行，即使它们不是相同的情况。我建议删除where子句。

请在问题中添加所有元素。我假设光标是存储过程的一部分，因为您使用

Exec sp_TEST@AutoDataType

调用它；存储过程中有什么？自定义数据类型的定义是什么？这看起来像sql server，而不是MySQL。请建议我如何循环表类型并更新表