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POASP.NET Update Panel with CheckBox - Not Working Properly
 

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  1. POASP.NET Update Panel with CheckBox - Not Working Properly
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    <p>I'm working on a simple demo project so that I can learn some things about ASP.NET's AJAX capabilities. My problem is that I can't seem to get an UpdatePanel to work properly with a CheckBox inside of it. Here is the markup I'm using in my .aspx file:</p> <pre><code>&lt;%@ Page Title="" Language="C#" AutoEventWireup="true" CodeBehind="UpdatePanel.aspx.cs" Inherits="Testing.UpdatePanel" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" &gt; &lt;head&gt; &lt;title&gt;&lt;/title&gt; &lt;style type="text/css"&gt; td { font-family:Arial; font-size:10pt; } #mainTable { background-color:#e3f3ff; border:3px; border-color:#000000; border-style:solid; } &lt;/style&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;div&gt; &lt;center&gt; &lt;table id="mainTable"&gt; &lt;tr&gt;&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt; &lt;asp:ScriptManager ID="SM1" runat="server" /&gt; &lt;asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"&gt; &lt;ContentTemplate&gt; &lt;tr&gt; &lt;td&gt;&lt;asp:CheckBox ID="chkPaypal" runat="server" Text="Paypal" OnCheckedChanged="PayPal_CheckedChanged" AutoPostBack="true" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;asp:Panel ID="pnlPayPal" runat="server" Visible="false"&gt; &lt;tr&gt; &lt;td&gt;&amp;nbsp;&amp;nbsp;&lt;asp:Label runat="server" ID="lblPaypalEmail" Text="Email:" /&gt;&lt;/td&gt; &lt;td&gt;&lt;asp:TextBox runat="server" ID="tbPaypalEmail" Text="" Width="250px" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt;&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt; &lt;/asp:Panel&gt; &lt;/ContentTemplate&gt; &lt;Triggers&gt; &lt;asp:ASyncPostBackTrigger ControlID="chkPayPal" /&gt; &lt;/Triggers&gt; &lt;/asp:UpdatePanel&gt; &lt;tr&gt;&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt; &lt;tr&gt; &lt;td colspan="2"&gt; &lt;center&gt; &lt;asp:Button ID="btnRegister" runat="server" onclick="btnRegister_Click" Text="Register" Height="30px" Width="80px" /&gt; &lt;/center&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt;&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt; &lt;/table&gt; &lt;/center&gt; &lt;/div&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>In my code behind, I have:</p> <pre><code>using System; namespace Testing { public partial class UpdatePanel : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btnRegister_Click(object sender, EventArgs e) { } protected void PayPal_CheckedChanged(object sender, EventArgs e) { pnlPayPal.Visible = chkPaypal.Checked; } } } </code></pre> <p>Instead of making the panel visible as I anticipate, it is adding another "PayPal" checkbox at the top of the page. Any ideas?</p>
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    1. USRussell Patterson
    1. USRussell Patterson
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    1. COThere isn't anything wrong with your code - is this all the code there is?
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      1. UScodingbadger
    2. COThere, I added the complete code for that page.
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      1. USRussell Patterson
 

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