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POHow to access controls in a user control in javascript using <%=Control.ClientId%>
 

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  1. POHow to access controls in a user control in javascript using <%=Control.ClientId%>
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    <p>I have a created a user control as below:</p> <pre><code>&lt;%@ Control Language="VB" AutoEventWireup="false" CodeFile="Add.ascx.vb" Inherits="Add" %&gt; &lt;asp:Label ID="Label1" runat="server" Text="Num1"&gt;&lt;/asp:Label&gt; &lt;asp:TextBox ID="tbNum1" runat="server" onblur="sum(document.getElementById('&lt;%=tbNum1.ClientId %&gt;').value,document.getElementById('&lt;%=tbNum2.ClientId %&gt;').value,'&lt;%=tbSum.ClientId %&gt;');"&gt;&lt;/asp:TextBox&gt; &lt;br /&gt; &lt;asp:Label ID="Label2" runat="server" Text="Num2"&gt;&lt;/asp:Label&gt; &lt;asp:TextBox ID="tbNum2" runat="server"&gt;&lt;/asp:TextBox&gt; &lt;br /&gt; &lt;asp:Label ID="Label3" runat="server" Text="Sum:"&gt;&lt;/asp:Label&gt; &lt;asp:TextBox ID="tbSum" runat="server"&gt;&lt;/asp:TextBox&gt; &lt;script type="text/javascript"&gt; function sum(a, b, controlId) { if (a != '' &amp;&amp; b != '') { document.getElementById(controlId).value = parseInt(a) + parseInt(b); } } &lt;/script&gt; </code></pre> <p>I have multiple instances of above user control in a web page. Below is the code:</p> <pre><code>&lt;%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %&gt; &lt;%@ Register Src="~/Add.ascx" TagPrefix="uc" TagName="Add" %&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 runat="server"&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;div&gt; &lt;uc:Add runat="server" ID="ucAdd1" /&gt; &lt;uc:Add runat="server" ID="ucAdd2" /&gt; &lt;/div&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>When I see the view source, &lt;=control.ClientId%> is not rendering the client ID of the control. My question here is why &lt;=control.ClientId%> is not working in inline javascript is there any mistake in syntax? Also is there any way to access the textboxes in each user control separately? </p> <p>Please advise.</p>
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    1. CO`ClientID` instead of `ClientId`
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      1. POHow to access controls in a user control in javascript using <%=Control.ClientId%>
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    2. COThere will be no ClientId for TextBox.. in your case just use the textbox id by concatenating the usercontrol id you are using.. if your usercontrol's tag-prefix is uc then uc_textboxid
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      1. POHow to access controls in a user control in javascript using <%=Control.ClientId%>
      1. USLakshmi Prasanna
    3. COIs it not possible to write a common javascript function inside the user contol markup to access the controls in it if a page has multiple instances of the user control?
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      1. POHow to access controls in a user control in javascript using <%=Control.ClientId%>
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