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Version Q2 2011 released 07/12/2011
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Chart / PostBack Events

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Did you know that you can add Telerik Silverlight Charts to your ASP.NET applications?

RadControls for Silverlight


  • You can control the application behavior depending on a clicked chart item. The postback event handler allows you to handle appropriately the clicked series, series item or legend item.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Inherits="Telerik.ChartExamplesVB.PostbackEvents.DefaultVB" Language="vb" CodeFile="DefaultVB.aspx.vb" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="telerik" Namespace="Telerik.Charting" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="telerik" Namespace="Telerik.QuickStart" %>
    <%@ 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 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
        <head runat="server">
            <telerik:HeadTag runat="server" ID="Headtag1"></telerik:HeadTag>
            <!-- custom head section -->
            <style type="text/css">
                table.center {margin-left:auto; margin-right:auto;}
            </style>
            <!-- end of custom head section -->
        </head>
        <body class="BODY">
            <form runat="server" id="mainForm" method="post">
                <telerik:Header ShowSkinChooser="false" runat="server" ID="Header1" NavigationLanguage="VB" XhtmlVersion="1.0" accessibilityLevel="AA"></telerik:Header>
                <asp:ScriptManager ID="ScriptManager" runat="server" />
                <!-- content start -->
                <table style="border: 0px" summary="">
                    <tr>
                        <td style="width: 1px">
                            <telerik:RadChart ID="RadChart1" runat="server">
                                <PlotArea>
                                    <YAxis Step="20">
                                    </YAxis>
                                    <YAxis2 MaxValue="7" MinValue="1" Step="1">
                                    </YAxis2>
                                    <XAxis MaxValue="7" MinValue="1" Step="1">
                                    </XAxis>
                                </PlotArea>
                                <Series>
                                    <telerik:ChartSeries ActiveRegionToolTip="Click here" Name="Series 1">
                                    </telerik:ChartSeries>
                                    <telerik:ChartSeries ActiveRegionToolTip="Click here" Name="Series 2">
                                    </telerik:ChartSeries>
                                </Series>
                                <telerik:ChartTitle>
                                    <TextBlock Text="Postback Events">
                                    </TextBlock>
                                </telerik:ChartTitle>
                            </telerik:RadChart>
                        </td>
                        <td style="width: 200px; vertical-align: top">
                            <table class="module" style="WIDTH:200px;HEIGHT:130px">
                                <tr>
                                    <td>
                                        <label for="txtBoxClickedSeries">
                                            <asp:Label id="Label1" runat="server">Clicked Series:</asp:Label>
                                        </label>
                                    </td>
                                    <td>
                                        <asp:TextBox id="txtBoxClickedSeries" runat="server" ReadOnly="True"></asp:TextBox>
                                    </td>
                                </tr>
                                <tr>
                                    <td>
                                        <label for="txtBoxClickedItem">
                                            <asp:Label id="Label2" runat="server">Clicked Item:</asp:Label>
                                        </label>
                                    </td>
                                    <td>
                                        <asp:TextBox id="txtBoxClickedItem" runat="server" ReadOnly="True"></asp:TextBox>
                                    </td>
                                </tr>
                                <tr>
                                    <td style="white-space: nowrap;">
                                        <label for="txtBoxClickedLegendItem">
                                            <asp:Label id="Label3" runat="server">Clicked Legend Item:</asp:Label>
                                        </label>
                                    </td>
                                    <td>
                                        <asp:TextBox id="txtBoxClickedLegendItem" runat="server" ReadOnly="True"></asp:TextBox>
                                    </td>
                                </tr>
                            </table>
                        </td>
                    </tr>
                </table>
                <!-- content end -->
                <telerik:Footer runat="server" ID="Footer1"></telerik:Footer>
            </form>
        </body>
    </html>

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