Nov 13 2006

Javascript include from ASP.NET server control

Posted by admin under Controls

In ASP.NET 2.0 the Page object has a Header property - which contains a Controls collection. This is good news since it makes it possible  to (easily) inject a <script type="text/javascript" src="whatever"> into the <head></head> section of the resulting HTML page.

You can - for example from the code of your custom server control - add a htmlgeneric control to the containing page header control like this:



string sInclude = "~/specialincludes/blabla.js";

sInclude = ResolveUrl( sInclude );

HtmlGenericControl Include = new HtmlGenericControl("script");
Include.Attributes.Add("type", "text/javascript");
Include.Attributes.Add("src", sInclude);
this.Page.Header.Controls.Add(Include);

and that would make the resulting html code look like this:



<head runat="server">
    <title>Untitled Page</title>
    <script type="text/javascript" src="/thesite/specialincludes/blabla.js"></script>

I will later present a more complete example using this technique, for now I just present the way of doing it.