using System;
using System.Web.UI;

namespace YourWebsite
{
	/// <summary>
	/// Base page class for all web pages on your website.
	/// Indicate this in your Web.config file using the pageBaseType attribute of the pages element,
	/// and whenever you create a class that would normally derive from System.Web.UI.Page, derive from this instead.
	/// </summary>
	public class DefaultPage : Page
	{
		// Set this to your host name; as you can see below, it is used to detect whether or not the site is live (i.e. not localhost).
		const string hostName = "example.com";

		// This is the code from Google that they have you inject inline, current as of 2008-11-11.
		const string gatInlineScript =
@"var pageTracker = _gat._getTracker(""UA-5001336-1"");
pageTracker._initData();
pageTracker._trackPageview();";

		protected override void OnLoadComplete(EventArgs e)
		{
			// Only insert Google analytics code when we're on the live webserver; don't do it, for example, with localhost.
			if (this.Request.Url.Host.IndexOf(DefaultPage.hostName, 0, StringComparison.OrdinalIgnoreCase) != -1)
			{
				// Figure out which Google server to query; the Google sample code does this client-side.
				string gatUri = this.Request.IsSecureConnection ? "https://ssl." : "http://www." + "google-analytics.com/ga.js";

				// If the page has a script manager, we'll add a script reference to that, and get all the related benefits;
				// otherwise, inject an include manually.
				ScriptManager scriptManager = ScriptManager.GetCurrent(this);
				if (scriptManager != null)
				{
					scriptManager.Scripts.Add(new ScriptReference(gatUri));
				}
				else
				{
					this.ClientScript.RegisterClientScriptInclude("GATInclude", gatUri);
				}

				// Add this block of script inline at the bottom.
				this.ClientScript.RegisterStartupScript(this.GetType(), "GAT", DefaultPage.gatInlineScript, true);
			}

			// You might want to add custom logic here, specific to your site, and unrelated to Google analytics.
			// For example, on my site it uses the Web.sitemap file to compose this.Title (i.e. the page's title, in the titlebar of the browser).

			base.OnLoadComplete(e);
		}
	}
}