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Version Q1 2012 released 04/11/2012
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Ajax / First Look



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  • This example illustrates how easy it is to AJAX-enable an asp.net control. By simply wrapping a standard (or custom) control in a RadAjaxPanel, all postbacks that it performs will be converted to an AJAX requests without writing a single line of code. All events handlers, viewstate and form data are preserved and the page life cycle goes on as normal. We have chosen two relatively complex controls: a Calendar and a Grid and have wrapped them in RadAjaxPanel to demonstrate how to "ajaxify" them.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Language="c#" CodeFile="DefaultCS.aspx.cs" AutoEventWireup="false" Inherits="Telerik.AJAXExamplesCSharp.AJAX.Examples.Panel.FirstLook.DefaultCS" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="telerik" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="telerik" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="telerik" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
    <html xml:lang="en-US" xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <telerik:HeadTag runat="server" ID="Headtag1"></telerik:HeadTag>
    </head>
    <body class="BODY">
        <form runat="server">
        <telerik:Header runat="server" ID="Header1" XhtmlCompliant="true" NavigationLanguage="CS"
            ShowSkinChooser="true"></telerik:Header>
        <!-- content start -->
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
        </telerik:RadScriptManager>
        <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" />
        <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1">
            <div>
    <asp:CheckBox ID="chkEnableAjax" runat="server" Checked="true" AutoPostBack="true"
    OnCheckedChanged="chkEnableAjax_CheckedChanged"/>
                <asp:Label ID="Label1" runat="server" AssociatedControlID="chkEnableAjax"> <strong>Switch on/off the Ajax of the RadAjaxPanel</strong></asp:Label>
            </div>
            <br /><br />
            <telerik:RadGrid ID="RadGrid1" DataSourceID="SqlDataSource1" runat="server" PageSize="20"
                AllowSorting="True" AllowMultiRowSelection="True" AllowPaging="True" ShowGroupPanel="True"
                AutoGenerateColumns="False" GridLines="none">
                <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
                <MasterTableView Width="100%">
                    <GroupByExpressions>
                        <telerik:GridGroupByExpression>
                            <SelectFields>
                                <telerik:GridGroupByField FieldAlias="Received" FieldName="Received" FormatString="{0:D}"
                                    HeaderValueSeparator=" from date: "></telerik:GridGroupByField>
                            </SelectFields>
                            <GroupByFields>
                                <telerik:GridGroupByField FieldName="Received" SortOrder="Descending"></telerik:GridGroupByField>
                            </GroupByFields>
                        </telerik:GridGroupByExpression>
                    </GroupByExpressions>
                    <Columns>
                        <telerik:GridBoundColumn SortExpression="Received" HeaderText="Received" HeaderButtonType="TextButton"
                            DataField="Received" DataFormatString="{0:d}">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn SortExpression="From" HeaderText="From" HeaderButtonType="TextButton"
                            DataField="From">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn SortExpression="FolderName" HeaderText="Folder name" HeaderButtonType="TextButton"
                            DataField="FolderName">
                        </telerik:GridBoundColumn>
                        <telerik:GridBoundColumn SortExpression="Size" HeaderText="Size" HeaderButtonType="TextButton"
                            DataField="Size">
                        </telerik:GridBoundColumn>
                    </Columns>
                </MasterTableView>
                <ClientSettings ReorderColumnsOnClient="True" AllowDragToGroup="True" AllowColumnsReorder="True">
                    <Selecting AllowRowSelect="True"></Selecting>
                    <Resizing AllowRowResize="True" AllowColumnResize="True" EnableRealTimeResize="True"
                        ResizeGridOnColumnResize="False"></Resizing>
                </ClientSettings>
                <GroupingSettings ShowUnGroupButton="true" />
            </telerik:RadGrid>
        </telerik:RadAjaxPanel>
        <br />
        <asp:SqlDataSource ID="SqlDataSource1" ConnectionString="<%$ ConnectionStrings:TelerikConnectionString %>"
            ProviderName="System.Data.SqlClient" SelectCommand="SELECT * FROM Mails" runat="server">
        </asp:SqlDataSource>
        <!-- content end -->
        <telerik:Footer runat="server" ID="Footer1"></telerik:Footer>
        </form>
    </body>
    </html>

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