SQL Server存储过程SCOPE_IDENTITY()问题

时间:2013-08-12 18:52:21

标签: sql asp-classic insert output procedure

我有这个存储过程并在其中,你可以看到我使用两个SCOPE_IDENTITY();问题是,对于第二个scope_identity,我将它分配给@status变量,但是当我执行存储时,OUTPUT @status变量为null,但奇怪的是两个插入工作正常。

我想返回存储的第二个插入的scope_identity的输出。你能救我吗?

ALTER PROCEDURE [dbo].[sp_UserInsert]
(
@Username   nvarchar(50)=null,
@Password   nvarchar(50)=null,
@Email      nvarchar(50)=null,
@RoleId     int = 0,
@UserId     int = 0,
@typeOp     int,
@status     int = 0 OUTPUT
)   

AS
BEGIN

SET NOCOUNT ON;

if (@typeOp = 1)
/*Creazione nuovo recordo nella tabella Utenti*/
BEGIN
 if exists(select * from Gruppi where Gruppi.GroupID =@roleid)
     BEGIN
        INSERT INTO dbo.Utenti(Username,Password,Email) VALUES(@Username,@Password,@Email)
        set @UserId = SCOPE_IDENTITY()
        if (@UserId > 0)
            BEGIN
                INSERT INTO dbo.Ruoli(UserID,GroupID) VALUES(@UserId,@RoleId)

                set @status = @@rowcount
            END

     END

END


END

现在我遇到的问题是,如果我从SQL Server Management Studio执行存储过程,它可以正常工作,但如果我从我的代码执行存储过程仅工作第一次! 这是代码:

 string connectionString = ConfigurationManager.ConnectionStrings["SQLConnStr"].ConnectionString;

void SubmitNewUser_Click(Object sender, EventArgs e)
{
    string username = txtUsername.Text;
    string email = txtEmail.Text;       
    string password = txtPassword.Text;
    int ddlRoleId = Convert.ToInt32(ddlRoles.SelectedValue);

    if (!string.IsNullOrWhiteSpace(username) && !string.IsNullOrWhiteSpace(email) && !string.IsNullOrWhiteSpace(password) && ddlRoleId > 0)
    {
        if (CheckUsernameAvailability(username))
        {

            try
            {
                if (!string.IsNullOrWhiteSpace(connectionString))
                {
                    using (SqlConnection dbconn = new SqlConnection(connectionString))
                    {
                        dbconn.Open();

                        SqlCommand command = new SqlCommand("sp_UserInsert", dbconn);
                        command.CommandType = CommandType.StoredProcedure;
                        command.Parameters.AddWithValue("@Username", username);
                        command.Parameters.AddWithValue("@Password", password);
                        command.Parameters.AddWithValue("@Email", email);
                        command.Parameters.AddWithValue("@RoleId", 1);
                        command.Parameters.AddWithValue("@typeOp", 1);
                        command.ExecuteNonQuery();

                        dbconn.Close();
                    }
                }
            }

            catch (Exception ex)
            {
                // Add error handling here for debugging.
                // This error message should not be sent back to the caller.
                System.Diagnostics.Trace.WriteLine("[ValidateUser] Exception " + ex.Message);
            }
        }
    }
}

1 个答案:

答案 0 :(得分:0)

据我了解,您的第二张表中没有身份证明。我认为,User_ID,Group_Id是表中的唯一键,因此您可以使用

select * from dbo.Ruoil where User_ID = @User_ID and Group_ID = @RoleId

如果您只想检查某些行是否受影响,可以使用@@rowcount