New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Filtering with RadFilter

  • And
  • Or
  • Contains
  • StartsWith
  • EndsWith
  • EqualTo
  • NotEqualTo
  • GreaterThan
  • LessThan
  • GreaterThanOrEqualTo
  • LessThanOrEqualTo
  • IsEmpty
  • NotIsEmpty
  • IsNull
  • NotIsNull
  • OrderID
  • OrderDate
  • ShipVia
  • ShipName
  • ShipAddress
  • ShipCity
  • ShipCountry
OrderID: 10267
Order date: 7/29/1996
Ship city: München
Ship country: Germany
Ship name: Frankenversand
OrderID: 10270
Order date: 8/1/1996
Ship city:
Ship country: Finland
Ship name: Wartian Herkku
OrderID: 10271
Order date: 8/1/1996
Ship city: Lander
Ship country: USA
Ship name: Split Rail Beer & Ale
OrderID: 10273
Order date: 8/5/1996
Ship city: Cunewalde
Ship country: Germany
Ship name: QUICK-Stop
OrderID: 10275
Order date: 8/7/1996
Ship city: Bergamo
Ship country: Italy
Ship name: Magazzini Alimentari Riuniti
OrderID: 10276
Order date: 8/8/1996
Ship city: México D.F.
Ship country: Mexico
Ship name: Tortuga Restaurante
OrderID: 10277
Order date: 8/9/1996
Ship city: Leipzig
Ship country: Germany
Ship name: Morgenstern Gesundkost
OrderID: 10278
Order date: 8/12/1996
Ship city: Luleå
Ship country: Sweden
Ship name: Berglunds snabbköp
February 2024
  • Demo Configurator
Show Line Images
Expression Preview Position

Allow Filter On Blur

RadFilter can be used to build complex filtering criteria by means of intuitive visual UI and depending on the data type of the underlying source fields. This example demonstrates the integration between RadFilter and RadListView for ASP.NET AJAX.

To apply the filter expressions when you build it in par with your preferences, click the "Apply" button. This will trigger the ApplyExpressions server event of RadFilter which can be intercepted explicitly or handled implicitly by setting FilterContainerID (as shown on the demo). RadFilter will build RadFilterExpression hierarchy and pass it to RadListView to perform filtering.

Operations that can be performed via RadFilter's user interface:

  • Add/Remove expressions - Expression can be single or grouped expression/condition. Deleting a group removes all child expressions, except for root group which cannot be deleted.
  • Change group operator - Group operators are supplied by the filterable container (RadListView in this case). By clicking on group operator a list with supported operators will be shown.
  • Change filter function - Filter functions are supplied by the filterable container in the same manner as group operators.
  • Change field name - When bound, the filterable container (RadListView) supplies a list of all fields that can be used to perform filtering. RadFilter allows the end user to build filter expression depending on the field name and its data type.
  • DefaultVB.aspx
  • DefaultVB.aspx.vb
  • styles.css
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="Telerik.Web.Examples.ListView.Examples.FilteringWithRadFilter.DefaultVB" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns=''>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link href="styles.css" rel="stylesheet" />
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
  <telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel1">
        <div class="demo-container">
            <div class="filterWrapper">
                <telerik:RadFilter RenderMode="Lightweight" runat="server" ID="RadFilter2" FilterContainerID="RadListView1" ExpressionPreviewPosition="Bottom">
          <telerik:RadListView ID="RadListView1" RenderMode="Lightweight" DataSourceID="SqlDataSource1" Width="100%"
                PageSize="8" AllowPaging="True" runat="server" ItemPlaceholderID="ProductsHolder"
                    <div class="rlvA">
                                        <asp:Label ID="OrderIDLabel" runat="server" Text='<%#Eval("OrderID") %>'></asp:Label>
                                        <br />
                                        <strong>Order date:</strong>
                                        <asp:Label ID="OrderDateLabel" runat="server" Text='<%#DirectCast(Eval("OrderDate"),DateTime).ToShortDateString()%>'></asp:Label>
                                        <br />
                                        <strong>Ship city:</strong>
                                        <asp:Label ID="ShipCityLabel" runat="server" Text='<%#Eval("ShipCity") %>'></asp:Label>
                                        <br />
                                        <strong>Ship country:</strong>
                                        <asp:Label ID="ShipCountryLabel" runat="server" Text='<%# Eval("ShipCountry") %>'></asp:Label>
                                        <br />
                                        <strong>Ship name:</strong>
                                        <asp:Label ID="ShipNameLabel" runat="server" Text='<%#Eval("ShipName") %>'></asp:Label>
                                        <br />
                                        <img src="images/ordertracking.gif" alt="" />
                    <fieldset style="padding: 10px;">
                        <legend style="margin-left: 20px">Orders</legend>
                        <div class="RadListView RadListViewFloated RadListView_Default">
                            <div class="rlvFloated">
                                <div id="ProductsHolder" runat="server">
                            <div style="display: none">
                                <telerik:RadCalendar RenderMode="Lightweight" ID="rlvSharedCalendar" runat="server" RangeMinDate="<%#new DateTime(1900, 1, 1) %>"
                                    Skin="<%#Container.Skin %>">
                            <div style="display: none">
                                <telerik:RadTimeView ID="rlvSharedTimeView" runat="server" Skin="<%# Container.Skin %>">
                                <telerik:RadDataPager RenderMode="Lightweight" ID="RadDataPager1" PageSize="8" runat="server">
                                        <telerik:RadDataPagerButtonField FieldType="Numeric"></telerik:RadDataPagerButtonField>
    <asp:SqlDataSource runat="server" ID="SqlDataSource1" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
        SelectCommand="Select OrderID, OrderDate, ShipVia, ShipName, ShipAddress, ShipCity, ShipCountry FROM Orders"></asp:SqlDataSource>
    <qsf:ConfiguratorPanel ID="ConfiguratorPanel1" runat="server">
                <qsf:ConfiguratorColumn ID="ConfiguratorColumn1" runat="server" Size="Medium" Title="Show Line Images">
                    <qsf:RadioButtonList runat="server" ID="FilterLines" AutoPostBack="true" OnSelectedIndexChanged="FilterLines_SelectedIndexChanged">
                        <asp:ListItem Text="Enabled" Value="true" Selected="True"></asp:ListItem>
                        <asp:ListItem Text="Disabled" Value="false"></asp:ListItem>
                <qsf:ConfiguratorColumn ID="ConfiguratorColumn2" runat="server" Size="Medium" Title="Expression Preview Position">
                    <qsf:RadioButtonList runat="server" ID="ExpressionPreview" AutoPostBack="true" OnSelectedIndexChanged="ExpressionPreview_SelectedIndexChanged">
                        <asp:ListItem Text="None" Value="None"></asp:ListItem>
                        <asp:ListItem Text="Top" Value="Top"></asp:ListItem>
                        <asp:ListItem Text="Bottom" Value="Bottom" Selected="True"></asp:ListItem>
                <qsf:ConfiguratorColumn ID="ConfiguratorColumn3" runat="server" Size="Medium" Title="Allow Filter On Blur">
                    <qsf:RadioButtonList runat="server" ID="AutoPostbackOnBlur" AutoPostBack="true" OnSelectedIndexChanged="AutoPostbackOnBlur_SelectedIndexChanged">
                        <asp:ListItem Text="Enabled" Value="true"></asp:ListItem>
                        <asp:ListItem Text="Disabled" Value="false" Selected="True"></asp:ListItem>

Support & Learning Resources

Find Assistance