I need to add links to the header of an ASPX page based on a server-side function being called from Page_Load() of the Master Page. The entire site is using the same Master Page.
What's the best way to do this?
An <asp:Literal> control in the <head>?
Maybe too late, but the approach below has the advantage, that the same script is never added twice.
public static void RegisterClientScriptInclude(Page page, string name, string url)
{
Type cstype = page.GetType();
// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = page.ClientScript;
// Check to see if the include script exists already.
if (!cs.IsClientScriptIncludeRegistered(cstype, name))
{
cs.RegisterClientScriptInclude(cstype, name, page.ResolveClientUrl(url));
}
}
Come in handy, if you add external javascript files from different user controls on a need basis.
There are many ways to do that:
In your Page_Load method, access the header of your master page programmatically like:
HtmlGenericControl style = new HtmlGenericControl("link");
style.Attributes.Add("href", "path-to-your-style");
style.Attributes.Add("rel", "stylesheet");
style.Attributes.Add("type", "text/css");
this.Page.Header.Controls.AddAt(0, style);
Second way is to put runat='server' attribute on your conditional styles in head, and in your Page_Load method, turn their visibility on or off:
<link type='text/css' rel='stylesheet' href='path-to-css-file'
runat='server' id='cssFile' />
then in your Page_Load you have:
if (conditionIsNotMet)
{
cssFile.Visible = false;
}
I've had success doing things like this in the past.
<link rel="Stylesheet" type="text/css" href="<%= System.Configuration.ConfigurationManager.AppSettings["dhxStyle"] %>" />
