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POHow can I access an IFRAME from the codebehind file in ASP.NET?
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  1. POHow can I access an IFRAME from the codebehind file in ASP.NET?
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    copied!<p>I am trying to set attributes for an IFRAME html control from the code-behind aspx.cs file.</p> <p>I came across a <a href="http://geekswithblogs.net/ranganh/archive/2005/04/25/37635.aspx" rel="noreferrer">post</a> that says you can use FindControl to find the non-asp controls using:</p> <p>The aspx file contains:</p> <pre><code>&lt;iframe id="contentPanel1" runat="server" /&gt; </code></pre> <p>and then the code-behind file contains:</p> <pre><code>protected void Page_Load(object sender, EventArgs e) { HtmlControl contentPanel1 = (HtmlControl)this.FindControl("contentPanel1"); if (contentPanel1 != null) contentPanel1.Attributes["src"] = "http://www.stackoverflow.com"; } </code></pre> <p>Except that it's not finding the control, contentPanel1 is null.</p> <hr> <p><strong>Update 1</strong></p> <p>Looking at the rendered html:</p> <pre><code>&lt;iframe id="ctl00_ContentPlaceHolder1_contentPanel1"&gt;&lt;/iframe&gt; </code></pre> <p>i tried changing the code-behind to:</p> <pre><code>HtmlControl contentPanel1 = (HtmlControl)this.FindControl("ctl00_ContentPlaceHolder1_contentPanel1"); if (contentPanel1 != null) contentPanel1.Attributes["src"] = "http://www.clis.com"; </code></pre> <p>But it didn't help.</p> <p>i am using a MasterPage.</p> <hr> <p><strong>Update 2</strong></p> <p>Changing the aspx file to:</p> <pre><code>&lt;iframe id="contentPanel1" name="contentPanel1" runat="server" /&gt; </code></pre> <p>also didn't help</p> <hr> <p><strong>Answer</strong></p> <p>The answer is obvious, and unworthy of even asking the original question. If you have the aspx code:</p> <pre><code>&lt;iframe id="contentPanel1" runat="server" /&gt; </code></pre> <p>and want to access the iframe from the code-behind file, you just access it:</p> <pre><code>this.contentPanel1.Attributes["src"] = "http://www.stackoverflow.com"; </code></pre>
 

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