Question

我有一个类型化的数据集userProfile，它与我的数据库中的用户表相同。我正在使用存储过程更改密码并返回同一用户的单行。但是当我在.cs代码中使用此过程时，sql异常告诉

[There is no row at position 0.]

in public UserRow this[int index] {
Line 413:                get {
Line 414:                    return ((UserRow)(this.Rows[index]));
Line 415:                }
Line 416:            }

但我的密码被更改了..

这是我的存储过程

ALTER proc [dbo].[sp_Campaign_PasswordChange]
@username varchar(50),
@old_password varchar(50),
@new_password varchar(50)

as

BEGIN TRY
BEGIN TRANSACTION
if exists(select "USER_ID" from "User" where User_Login_Id=@username and Password=@old_password)
   begin

   select User_Id  from "User" where User_Login_Id=@username
   update "User" set Password=@new_password where User_Login_Id=@username


   end 

   else
   RAISERROR ('username or password does not exists',10,1)


 COMMIT TRANSACTION      




END TRY     

BEGIN CATCH
ROLLBACK TRANSACTION
RETURN @@ERROR
END CATCH

但如果我在结尾写了select语句，那么就不会产生错误

plz help

Answer 1

尝试：

public UserRow this[int index] {
          get {
                  if(this.Rows.Count > 0)
                {
                   return ((UserRow)(this.Rows[index]));
                }
 return null;
           }
  }

var row = this[0];

if (row != null){ // Do something }

数据集出错

1 个答案: