问题
as you all know, ASP.NET includes each CSS stylesheet in the App_Themes's Theme folder inside the page. No discussion.
But now, I'm facing a little problem having lots of CSS files in a theme and willing to use a static content domain. I would like to load all the static content of my website from the static domain (not only CSS, but also icons, images, etc.), but let's now pay attention only to CSS.
My question is
Is it possible to override the behaviour of Page class, and for each CSS file found in Theme's folder, rewrite the <link> tag with the correct URL of the static content domain? I have nothing preventing me to deploy files into http://static.domain.com/App_Themes/Theme path, so at least adding a prefix to the tag is fine.
Thank you in advance.
回答1:
An alternate method is to write an http module. Have the module inspect the html being sent back to the client.
If it detects a style sheet reference, change the location that the style sheet is pulling from.
This works for the other items as well, such as images etc.
回答2:
Yes, you can. You can have a custom base page class write the CSS files it finds in the folder. Though, I'm not sure you can override the default behavior of the themes feature, so the easiest way is to move the CSS files outside of the default themes. Then, you can use the System.IO objects to read the directory, access the file, and generate the link.
HTH.
来源：https://stackoverflow.com/questions/4594549/asp-net-themes-and-static-contents