Thursday, August 25, 2011

How can I add external java script and css file dynamically in

 I need to add a .css and .js file based on the user logged in. I have the css class attributeds added to all of the elements I need to style. What I need to do now is add the .css and .js file to the page on page load based on logged in user.

The conventional way to loading external JavaScript (ie: .js) and CSS (ie: .css) files on a page is to stick a reference to them in the <head> section of your page, for example:
<script type="text/javascript" src="myscript.js"></script>
<link rel="stylesheet" type="text/css" href="main.css" />

 But keeping JavaScript and CSS functions in a separate file (a .js and .css file) is highly recommended. Once they are in a separate file and part of a project, the file can be imported into a page using RegisterClientScriptBlock method.

For instance, a .js file can be included in an ASP.NET page using the following code:

Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "MyScript",
   "<script language=javascript src='MyJSFile.js'>");

 and for including a .css file same code should rewrite as follows:

Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "MyCSS", 
 "<link rel=\"stylesheet\" type=\"text/css\" href=\"css/MyCSSFile.css\"/>");

 Once the .js file or .css is imported into the ASP.NET page, any of the JavaScript functions, css class and selectors can be called as before.

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