Question

Trying to return identity via Stored Procedure

Asked by: lawrmc

Hi
I have an SP that inserts into a table and then returns the @@Identity value. When I fire this in Query Analyser I get the Value back OK.
However, calling from ASP.NET page returns NULL

Heres the bit of code and the SP, any help appreciated


        xCommandUID = New SqlCommand("sp_CreateUID", dbConn)
        xCommandUID.CommandType = Data.CommandType.StoredProcedure
        xParamUID = xCommandUID.Parameters.Add("@PartNumber", Data.SqlDbType.VarChar)
        xParamUID.Value = Session("PARTNUMBER").ToString
        xParamUID = xCommandUID.Parameters.Add("@UID", Data.SqlDbType.Int)
        xParamUID.Direction = Data.ParameterDirection.Output
        Try
            xCommandUID.ExecuteNonQuery()
            lblUID.Visible = True
            lblUID.Text = xCommandUID.Parameters("@UID").SqlValue.ToString


CREATE PROCEDURE sp_CreateUID
(
@PartNumber nvarchar(50),
@UID integer  output
)

AS
declare @CreateDate as  datetime
set @CreateDate = getdate()

INSERT INTO tblTLPCTRL (PART_NUMBER,DATE_CREATED) VALUES
(@PartNumber,@CreateDate) SELECT @@IDENTITY

RETURN @@IDENTITY
GO


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Asked On
2006-10-18 at 08:40:55ID22029065
Tags

procedure

,

return

,

identity

,

stored

Topic

Programming for ASP.NET

Participating Experts
2
Points
125
Comments
3

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Answers

 

by: srivatsavayePosted on 2006-10-18 at 08:53:52ID: 17757996

I think You have to add another parameter called @ReturnValue in your code with the direction ouput..
 

 xParamUID = xCommandUID.Parameters.Add("@ReturnValue", Data.SqlDbType.Int)
        xParamUID.Direction = Data.ParameterDirection.Output


and then retrieve its value

 

by: XeavnPosted on 2006-10-18 at 08:56:54ID: 17758031

I typicially set up the return value as follows.

Dim objConn As New SQLConnection(dw.Data.CONNECTIONSTRING)
Dim objCmdSP As New SQLCommand()

objCmdSP.CommandType = CommandType.StoredProcedure
objCmdSP.CommandText = "sp_MyStoredProcedure"

Dim prmReturn As New SqlParameter("return", SqlDbType.Int)
prmReturn.Direction = ParameterDirection.ReturnValue
objCmdSP.Parameters.Add(prmReturn)

objConn.Open
objCmdSP.Connection = objConn
objCmdSP.ExecuteNonQuery()
objConn.Close

Dim intReturnVal As Integer
intReturnVal = Convert.ToInt32(prmReturn.Value)

If intReturnVal = 1 Then
   Return True
ElseIf intReturnVal > 1 Then
   _ID = intReturnVal
   Return True
Else
   Return False
End If

 

by: lawrmcPosted on 2006-10-19 at 01:57:59ID: 17764118

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