Sunday, March 1, 2009

Javascript include from ASP.NET server control

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>
<head>
Posted by Team Lead at 10:41 AM

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