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Version Q2 2011 released 07/12/2011
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PanelBar / Accessing Nested Controls

Registration


  • You can access any control embedded in a RadPanelBar's template.

    The FindControl method provides you with a reference to any control inside any of the templates used in the RadPanelBar or any of its PanelItems. You have to make sure that you properly typecast the returned value as FindControl returns a reference to a Control class.

    After you get the reference you may modify any properties of the referenced control. In this example the Text properties of the three TextBoxes are set.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <%@ Page Language="vb" CodeFile="DefaultVB.aspx.vb" AutoEventWireup="true" Inherits="Telerik.Web.Examples.PanelBar.ApplicationScenarios.AccessingNestedControls.DefaultVB" %>

    <%@ Register Src="PreviewVB.ascx" TagName="PreviewVB" TagPrefix="uc1" %>
    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <qsf:HeadTag ID="Headtag1" runat="server"></qsf:HeadTag>
        <link rel="stylesheet" type="text/css" href="styles.css" />
    </head>
    <body class="BODY">
        <form id="mainForm" method="post" runat="server">
            <telerik:RadScriptManager ID="ScriptManager" runat="server" />
            <qsf:Header ID="Header1" runat="server" NavigationLanguage="VB"></qsf:Header>
            <img src="images/registration-header.gif" alt="Registration" />
            <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server">
                <telerik:RadPanelBar runat="server" ID="RadPanelBar1" ExpandMode="SingleExpandedItem"
                    Width="740px">
                    <Items>
                        <telerik:RadPanelItem Expanded="True" Text="Step 1: Account Information" runat="server"
                            Selected="true">
                            <Items>
                                <telerik:RadPanelItem Value="AccountInformation" runat="server">
                                    <ItemTemplate>
                                        <div class="text" style="background-color: #edf9fe">
                                            <ul class="formList" id="accountInfo">
                                                <li>
                                                    <asp:Label runat="server" ID="nameLabel" AssociatedControlID="accountName">Account Name:</asp:Label>
    <asp:TextBox ID="accountName" CssClass="textInput" runat="server" ValidationGroup="accountValidation"
    Width="200px"></asp:TextBox>
    <asp:RequiredFieldValidator runat="server" ID="accountValidator" ValidationGroup="accountValidation"
    ControlToValidate="accountName" ErrorMessage="Account name is required" Text="*"></asp:RequiredFieldValidator>
                                                </li>
                                                <li>
                                                    <asp:Label runat="server" ID="Label1" AssociatedControlID="Password">Password:</asp:Label>
    <asp:TextBox ID="password" CssClass="textInput" TextMode="Password" ValidationGroup="accountValidation"
    runat="server" Width="140px"></asp:TextBox>
    <asp:RequiredFieldValidator runat="server" ValidationGroup="accountValidation" ID="passwordValidator"
    ControlToValidate="password" ErrorMessage="Password is required" Text="*"></asp:RequiredFieldValidator>
                                                </li>
                                                <li>
                                                    <asp:Label runat="server" ID="Label2" AssociatedControlID="cPassword">Confirm Password:</asp:Label>
    <asp:TextBox TextMode="Password" CssClass="textInput" ValidationGroup="accountValidation"
    ID="cPassword" runat="server" Width="140px"></asp:TextBox>
    <asp:RequiredFieldValidator runat="server" ValidationGroup="accountValidation" ID="RequiredFieldValidator2"
    ControlToValidate="cPassword" ErrorMessage="Password is required" Text="*"></asp:RequiredFieldValidator>
                                                </li>
                                                <li class="lastListItem">
                                                    <asp:Label runat="server" ID="Label3" AssociatedControlID="email">Email:</asp:Label>
    <asp:TextBox ID="email" ValidationGroup="accountValidation" CssClass="textInput"
    runat="server" Width="200px"></asp:TextBox>
    <asp:RegularExpressionValidator ID="emailValidator" runat="server" Display="Dynamic"
    ErrorMessage="Please enter a valid e-mail address." ValidationExpression="^[\w\.\-]+@[a-zA-Z0-9\-]+(\.[a-zA-Z0-9\-]{1,})*(\.[a-zA-Z]{2,3}){1,2}$"
    ControlToValidate="Email" ValidationGroup="accountValidation">
                                                    </asp:RegularExpressionValidator>
    <asp:RequiredFieldValidator ID="Requiredfieldvalidator1" runat="server" Display="Dynamic"
    ControlToValidate="Email" ErrorMessage="E-mail is required" Text="*" ValidationGroup="accountValidation" />
                                                </li>
                                            </ul>
                                            <br />
                                            <asp:ValidationSummary runat="server" ID="validationSummary" CssClass="validationSummary" />
    <asp:Button runat="server" ID="nextButton" OnClick="nextButton_Click" Text="Next"
    CssClass="nextButton" ValidationGroup="accountValidation" /><br />
                                            <br />
                                        </div>
                                    </ItemTemplate>
                                </telerik:RadPanelItem>
                            </Items>
                        </telerik:RadPanelItem>
                        <telerik:RadPanelItem Enabled="False" Text="Step 2: Newsletter options" runat="server">
                            <Items>
                                <telerik:RadPanelItem Value="NewsletterOptions" runat="server">
                                    <ItemTemplate>
                                        <div class="text" style="background-color: #edf9fe">
                                            <ul class="formList" id="newsletterOptions">
                                                <li>Receive email notification for:</li>
                                                <li>
    <asp:CheckBox runat="server" ID="productUpdates" /><asp:Label ID="Label5" CssClass="checkboxLabel"
    runat="server" AssociatedControlID="productUpdates">Product Updates</asp:Label>
                                                </li>
                                                <li>
    <asp:CheckBox runat="server" ID="promotions" /><asp:Label ID="Label4" CssClass="checkboxLabel"
    runat="server" AssociatedControlID="promotions">Promotions</asp:Label>
                                                </li>
                                                <li class="lastListItem">
    <asp:CheckBox runat="server" ID="corporateNews" /><asp:Label ID="Label6" CssClass="checkboxLabel"
    runat="server" AssociatedControlID="corporateNews">Corporate News</asp:Label>
                                                </li>
                                            </ul>
                                            <br />
                                            <asp:Button runat="server" ID="Button1" OnClick="nextButton_Click" Text="Next" CssClass="nextButton" /><br />
                                            <br />
                                        </div>
                                    </ItemTemplate>
                                </telerik:RadPanelItem>
                            </Items>
                        </telerik:RadPanelItem>
                        <telerik:RadPanelItem Enabled="False" Text="Step 3: Terms of use" runat="server">
                            <Items>
                                <telerik:RadPanelItem Value="Register" runat="server">
                                    <ItemTemplate>
                                        <div class="text" style="background-color: #edf9fe">
                                            <ul class="formList" id="termsOfUse">
                                                <li class="lastListItem">
                                                    <img src="Images/terms.gif" alt="sample terms" width="550" height="224" />
                                                    <br />
                                                    <br />
    <asp:CheckBox runat="server" ID="termsCheckBox" /><asp:Label ID="Label7" runat="server"
    CssClass="checkboxLabel" AssociatedControlID="termsCheckBox">I agree to the Terms &amp; Conditions</asp:Label>
    <asp:CustomValidator runat="server" ValidationGroup="registerGroup" ErrorMessage="You should agree with the terms and conditions.!"
    ClientValidationFunction="validateTerms" ID="termsValidator" Text="*" />
                                                    <br />
    <asp:Button runat="server" ID="registerButton" ValidationGroup="registerGroup" OnClick="registerButton_Click"
    Text="Register" CssClass="nextButton" />
                                                    <br />
                                                    <br />
                                                </li>
                                            </ul>
                                        </div>
                                    </ItemTemplate>
                                </telerik:RadPanelItem>
                            </Items>
                        </telerik:RadPanelItem>
                    </Items>
                    <CollapseAnimation Duration="100" Type="None" />
                    <ExpandAnimation Duration="100" Type="None" />
                </telerik:RadPanelBar>
                <br />
                <uc1:PreviewVB ID="previewControl" runat="server" Visible="false" />
    <asp:Button runat="server" ID="backButton" Visible="false" CssClass="qsfButton" Text="Back"
    OnClick="backButton_Click" Style="margin: 10px 0 30px 25px" />
            </telerik:RadAjaxPanel>
            <qsf:Footer ID="Footer1" runat="server"></qsf:Footer>
        </form>

        <script type="text/javascript">
            
            function validateTerms(source, args)
            {
                var checkbox = '<%=(Ctype(RadPanelBar1.Items(2).Items(0).FindControl("termsCheckBox"),CheckBox)).ClientID%>';
                args.IsValid = $get(checkbox).checked;
            }
            
        </script>

    </body>
    </html>

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