How to remove controls with runat="server" specified in asp.net_问答_开发者

How to remove controls with runat="server" specified in asp.net

开发者 https://www.devze.com 2023-04-07 20:54 出处：网络

I have a webpage with server accessible controls, see \'FileIconLink\' below: <body> <p class=\"FirstTitle style5\">Downloads:</p>

I have a webpage with server accessible controls, see 'FileIconLink' below:

<body>
    <p class="FirstTitle style5">Downloads:</p>
    <div id="BreadcrumbDiv">
        <p style="padding-left:5px; ">Page Loading...</p>
    </div><!--/BreadcrumbDiv-->
    <div id="DirLinksDiv">
        <p><span class="SecondTitle">Files:</span><开发者_开发问答/p>
            <a runat="server" href="#" id="FileIconLink">File</a>
            <% WriteFileLinks(); %>
        <p><span class="SecondTitle">Folders:</span></p>
            <a runat="server" href="#" id="FolderIconLink">Folder</a>
    </div><!--/DirLinksDiv-->
</body>
<%RemoveHTMLTemplates(); %>

Both 'FileIconLink' and 'FolderIconLink' are templates of web controls which are copied by my code - such as <% WriteFileLinks(); %> above. How could these templates be permanently removed from the web page at run-time on the server without causing the error:

The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

Thanks in advance!

This is because you have <% %> inside the control you're trying to change. Instead of using <% %> in the aspx page, I would modify the code behind to add a literal control or something to the div, like:

DirLinks.Controls.Add(new LiteralControl(WriteFile()));

You should then be able to modify your control form the code behind.

Your inline code is executed during render.

But you probably want to get rid of the templates during Load.

Which means that the two techniques conflict.

Ultimately I realised my approach was wrong, as Cade Roux was alluding to, I needed to make up my mind where the templates were going to be used.

My solution was as follows:

Make controls for containing the results of my (previously inline) code.
Use templates in Page_Load to fill the controls described above.
Delete templates in Page_Load.
Do nothing inline.

The Page object has another function apart from Page_Load function called Page_PreRender, this function gets executed before Page_Load. So please try remove logic in this Page_PreRender function. Please refer this link http://msdn.microsoft.com/en-us/library/system.web.ui.control.prerender.aspx