NET 2.0 added the ClientScriptManager to allow developers a simple method to add javascript and other "Script" capabilites to a web page easily. However, the documentation never really got developed, so attempting to use it can be a bit trick.
Lets start with adding an include of a .js file.
protected
override void Render(HtmlTextWriter writer)
{
if (!this.Page.ClientScript.IsClientScriptIncludeRegistered(this.GetType(), VirtualEarthSettings.VirtualEarthJScriptTagHeader))
{
this.Page.ClientScript.RegisterClientScriptInclude(this.GetType(), VirtualEarthSettings.VirtualEarthJScriptTagHeader, http://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6);
}
base.Render(writer);
}
Didn’t work did it?
Why?
You can’t call RegisterClientScriptInclude(…) after the PreRender section of the page lifecycle. Best bet: call in OnInit.
In fact about the ONLY ClientScriptManager function you can use after the PreRender is: ClientScript.RegisterStartupScript
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