Parameterized query in Classic Asp

My db access code is like following:

set recordset = Server.CReateObject("ADODB.Recordset")
set cmd1  = Server.CreateObject("ADODB.Command")
cmd1.ActiveConnection = Conn //connection object already created
cmd1.CommandText = "SELECT * FROM lbr_catmaster where catname = ?"
cmd1.CommandType = ad开发者_Python百科CmdText
set prm = cmd1.CreateParameter("@prm", 200, 1,200 , "development")
cmd1.Parameters.Append prm
set recordset = cmd1.Execute

But there is no db hit going. Please help with this. I am using sql server 2005.

Thanks.

In my code, this is how I get a recordset from a command:

Set rs = server.createobject("ADODB.Recordset")
Set cmd = server.createobject("ADODB.Command")

cmd.ActiveConnection = Conn //connection object already created
cmd.CommandText = "SELECT * FROM lbr_catmaster where catname = ?"
cmd.CommandType = adCmdText
cmd.CommandTimeout = 900 

set prm = cmd.CreateParameter("@prm", 200, 1, 200, "development")
cmd.Parameters.Append prm

' Execute the query for readonly
rs.CursorLocation = adUseClient
rs.Open cmd, , adOpenForwardOnly, adLockReadOnly

Hope it helps

I like using Parameters.Refresh, i.e.

set recordset = Server.CReateObject("ADODB.Recordset")
set cmd1  = Server.CreateObject("ADODB.Command")
cmd1.ActiveConnection = Conn ' connection object already created
cmd1.CommandText = "SELECT * FROM lbr_catmaster where catname = ?"
cmd1.CommandType = adCmdText
cmd1.Prepared = True ' only needed if u plan to reuse this command often
cmd1.Parameters.Refresh
cmd1.Parameters(0).Value = "development"
set recordset = cmd1.Execute

Looks like you aren't referencing your named parameter correctly in your query.

Try replacing:

cmd1.CommandText = "SELECT * FROM lbr_catmaster where catname = ?"

with:

cmd1.CommandText = "SELECT * FROM lbr_catmaster where catname = @prm"

and see if that helps.

If you have a complex criteria using parameters here is an example I had to create based on my requirements

    declare @loc smallint = ? , @dt1 date = ? SET @loc = ISNULL(@loc, 999) 
    SELECT m.* , c.*
    FROM Costs c INNER JOIN MbrData m ON c.SN = m.SN and c.startDT = m.startDT 
    WHERE (m.LocationID = @loc OR @loc = 999) AND (MonthYear = @dt1 OR @dt1 IS NULL) 
    ORDER BY m.LocationID

then in your asp

    cmd.CommandText = strSQL ' the string above
cmd.CommandType = 1 ' adCmdText
cmd.Parameters.Append cmd.CreateParameter("@loc",2,1) 'adSmallInt=2, adParamInput=1
cmd.Parameters("@loc") = rptlocation ' scrubbed location ID
cmd.Parameters.Append cmd.CreateParameter("@dt1",7,1) 'adDate=7, adParamInput=1
cmd.Parameters("@dt1") = scrubbed formatted date
set rst = cmd.Execute

Try leaving off the parameter name:

set prm = cmd1.CreateParameter(, 200, 1,200 , "development")