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A question about "error converting data type varchar to int".

Posted on 2006-07-18
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Last Modified: 2008-02-01
When I run below code (in the try...catch... block), I kept getting error message:"error converting data type varchar to int". I checked the database table and the variables in the program, there is no where defined as int type, all are varchar type. So why does this message show up? It's related with the output parameter in stored proc? Thanks a lot for any suggestions!

The simplified code block:

        objCmd = New OleDb.OleDbCommand
        objCmd.CommandText = "dbo.usp_CheckStatus"
        objCmd.Parameters.Add("@status_message", SqlDbType.VarChar)
        objCmd.Parameters("@status_message").Direction = ParameterDirection.Output

        objCmd.CommandType = CommandType.StoredProcedure
        objCmd.Connection = objConn

        Try
            objCmd.ExecuteNonQuery()
        Catch ex As OleDbException '
            MessageBox.Show(ex.Message)
        End Try

The simplified stored proc:

create proc usp_CheckStatus
@status_message varchar(20) out
as
set @status_message = 'abcde'      
return
0
Comment
Question by:heyday2004
8 Comments
 
LVL 43

Expert Comment

by:TimCottee
ID: 17129135
Hi heyday2004,

Can we see the rest of the sp? Does it still happen even with your simplified sp?

Tim Cottee
0
 
LVL 23

Expert Comment

by:apresto
ID: 17129144
Hi heyday2004,

If you run the stored proc command in query analyser do you get the sam error? If so the prob is with proc not code in which case we can move on from there, try it out

Apresto
0
 
LVL 23

Expert Comment

by:apresto
ID: 17129148
DECLARE @MyVar varchar(20)
exec usp_CheckStatus @MyVar
Print @MyVar

run that in query analyser
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Author Comment

by:heyday2004
ID: 17129315
Thanks for the reply. That's the whole stored proc, I've simplified to that extent but still couldn't find out the problem. It's still reporting :"error converting data type varchar to int". I guess it's related with the output parameter? BTW, it runs good in query analyzer. What does your above query mean? I ran it and returns nothing although succeeded, i think that's the right result. Anyway, any further suggestion is really appreciated. Thanks.
0
 
LVL 23

Assisted Solution

by:apresto
apresto earned 50 total points
ID: 17129335
if it printed nothing it means @status_message  isnt being set or returned, the query above, executes the stored proc and prints the output paramater
0
 

Author Comment

by:heyday2004
ID: 17129438
Yeah, anywhere is wrong in the program in using the output parameter?  Thanks.
0
 
LVL 6

Accepted Solution

by:
Nandakumar Sakthivel earned 450 total points
ID: 17129478
Hi,
   Just replace "SqlDbType.VarChar" with "OleDb.OleDbType.VarChar" as specified below

            objCmd.Parameters.Add("@status_message", OleDb.OleDbType.VarChar, 200)
            objCmd.Parameters("@status_message").Direction = ParameterDirection.Output

Thanks,
Nanda
0
 

Author Comment

by:heyday2004
ID: 17129737
Thanks a lot. Great help for me.
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