| ADO 2.5 Samples |  |
Filter and RecordCount Properties Example (JScript)
This example opens a Recordset on the Companies table of the Northwind database and then uses the Filter property to limit the records visible to those where the CompanyName field starts with the letter D. Cut and paste the following code to Notepad or another text editor, and save it as FilterJS.asp.
<!-- BeginFilterJS -->
<%@ Language=JavaScript %>
<%// use this meta tag instead of adojavas.inc%>
<!--METADATA TYPE="typelib" uuid="00000205-0000-0010-8000-00AA006D2EA4" -->
<html>
<head>
<title>ADO Recordset.Filter Example</title>
<style>
<!--
BODY {
font-family: 'Verdana','Arial','Helvetica',sans-serif;
BACKGROUND-COLOR:white;
COLOR:black;
}
.thead {
background-color: #008080;
font-family: 'Verdana','Arial','Helvetica',sans-serif;
font-size: x-small;
color: white;
}
.thead2 {
background-color: #800000;
font-family: 'Verdana','Arial','Helvetica',sans-serif;
font-size: x-small;
color: white;
}
.tbody {
text-align: center;
background-color: #f7efde;
font-family: 'Verdana','Arial','Helvetica',sans-serif;
font-size: x-small;
}
-->
</style>
</head>
<body bgcolor="White">
<h1>ADO Recordset.Filter Example</h1>
<!-- Page text goes here -->
<%
// connection and recordset variables
var Cnxn = Server.CreateObject("ADODB.Connection")
var strCnxn = "Provider='sqloledb';Data Source=" + Request.ServerVariables("SERVER_NAME") + ";" +
"Initial Catalog='Northwind';Integrated Security='SSPI';";
var rsCustomers = Server.CreateObject("ADODB.Recordset");
var SQLCustomers = "select * from Customers;";
// record variables
var fld, filter
var showBlank = " ";
var showNull = "-NULL-";
try
{
//open connection
Cnxn.Open(strCnxn);
// create recordset client-side using object refs
rsCustomers.ActiveConnection = Cnxn;
rsCustomers.CursorLocation = adUseClient;
rsCustomers.CursorType = adOpenKeyset;
rsCustomers.LockType = adLockOptimistic;
rsCustomers.Source = SQLCustomers;
rsCustomers.Open();
rsCustomers.MoveFirst();
//set filter
filter = "CompanyName LIKE 'b*'";
rsCustomers.Filter = filter
if (rsCustomers.RecordCount == 0) {
Response.Write("No records matched ");
Response.Write (SQLCustomers + "So cannot make table...");
Cnxn.Close();
Response.End
}
else {
// show the data
Response.Write('<table width="100%" border="2">');
while(!rsCustomers.EOF) {
Response.Write('<tr class="tbody">');
for (var thisField = 0; thisField < rsCustomers.Fields.Count; thisField++) {
fld = rsCustomers(thisField);
fldValue = fld.Value;
if (fldValue == null)
fldValue = showNull;
if (fldValue == "")
thisField=showBlank;
Response.Write("<td>" + fldValue + "</td>")
}
rsCustomers.MoveNext();
Response.Write("</tr>");
}
// close the table
Response.Write("</table>");
}
}
catch (e)
{
Response.Write(e.message);
}
finally
{
// clean up
if (rsCustomers.State == adStateOpen)
rsCustomers.Close;
if (Cnxn.State == adStateOpen)
Cnxn.Close;
rsCustomers = null;
Cnxn = null;
}
%>
</body>
</html>
<!-- EndFilterJS -->
See Also
Filter Property | RecordCount Property | Recordset Object