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reuse CommandText

Posted on 2006-07-07
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Last Modified: 2012-06-21
I have the following code.  I try to reset CommandText SQL based on a condition.   If ct = 1 Then reset CommandText SQL .  But, I don't think it works.  Can I change the SQL inside CommandText like that?  Thanks.
 
     CMD.Connection = conn
        conn.Open()
        CMD.CommandText = "SELECT  count(*) ct FROM  XX where LEASE='" & Request.QueryString("LEASE") & "'"

        da.SelectCommand = CMD
        da.Fill(ds, "ContactRequests")

        Dim ct As Integer = ds.Tables(0).Rows(0)("ct")

        If ct = 1 Then
            CMD.CommandText = "SELECT objID FROM  XX where LEASE='" & Request.QueryString("LEASE") & "'"
            da.SelectCommand = CMD
            da.Fill(ds, "ContactRequests")
            Dim objID As String = ds.Tables(0).Rows(0)("objID").ToString()
end if
   
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Question by:ewang1205
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3 Comments
 
LVL 4

Accepted Solution

by:
gregg1ep00 earned 2000 total points
ID: 17061062
There is a MUCH easier, much more efficient way to do this.  There is no need to use DataAdapters or DataSets if you're retrieving this tiny amount of data.

------------------------------
CMD.Connection = conn
CMD.CommandText = "SELECT count(*) ct FROM XX where LEASE='" & Request.QueryString("LEASE") & "'"

conn.Open()
Dim ct As Integer = CInt( CMD.ExecuteScalar() )

If ct = 1 Then
    CMD.CommandText = "SELECT objID FROM XX where LEASE='" & Request.QueryString("LEASE") & "'"
    Dim objID As String = CStr( CMD.ExecuteScalar() )
End If
------------------------------

Hope that helps!
Greg
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LVL 4

Expert Comment

by:gregg1ep00
ID: 17061085
Oops, forgot to close the connection.  After the code above, add this line:

conn.Close()
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Author Comment

by:ewang1205
ID: 17061157
gregg1ep00:  That is great.  Faster and simpler and working great!  Thanks.
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