Help with ASP.net Code

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<h3>Request ID:<%开发者_如何学运维=Request["request_id"]%></h3>
</asp:Content>

The Code above is not working. How do I display the request id without touching the code behind file?

Try:

http://YOUR_SERVER/your_aspx_file.aspx?request_id=2134234

Please check your html source code if the <h3> tag is inside. Because if it is not, the placeholder is hidden oder the inner controls has been removed before rendering.