How to add a media attribute to the CSS LINK html tag for the ASP.NET WebResource.axd Http Handler_问答_开发者

How to add a media attribute to the CSS LINK html tag for the ASP.NET WebResource.axd Http Handler

开发者 https://www.devze.com 2022-12-28 17:17 出处：网络

The ASP.NET WebResource.axd Http Handler is used to serve resources embedded in DLL\'s. The LINK html tag is automatically generated by ASP.NET.

The ASP.NET WebResource.axd Http Handler is used to serve resources embedded in DLL's.

The LINK html tag is automatically generated by ASP.NET.

I would like to i开发者_StackOverflow中文版ntercept the generation of the LINK html tag for a certain set of embedded CSS from a third party DLL and add a media attribute.

In summary:

I would like to add a Media attribute to the LINK html tag for the ASP.NET WebResource.axd Http Handler.

So this:

<link type="text/css" rel="stylesheet" href="/WebResource.axd?d=XXXXX" />

Appears like this:

<link media="screen and (min-device-width: 481px)" type="text/css" rel="stylesheet"
 href="/WebResource.axd?d=XXXXX" />

Cheers

There is a workaround. Firstly, links like this are being added to the Page's head. Your page must have runat=”server” in the <head> tag for the automatic style sheet inclusion. The pages created by the IDE have this setting automatically. So, links being added is a HtmlLink control type. The idea is to iterate through controls in Page's header, find HtmlLink controls and set necessary attribute (or even attributes). I include this into the Page_Load event:

Page.Header.Controls
    .OfType<HtmlLink>()
    .ToList()
    .ForEach(link =>
    {
        link.Attributes["media"] = "screen and (min-device-width: 481px)";
    });

Before this I had:

<head id="Header">
    <title></title>
    <link href="App_Themes/MyTheme/main.css" 
          type="text/css" 
          rel="stylesheet" />
</head>

and after the result is:

I know, this uses Themes insted of WebResource.axd but for the last one the result will be the same.

The latest thing: there may be another links in the page. So it would be good to recognize our links (the links need to be modified). So if there is no id attribute you could recognize them by href attribute.