style.cs

这是一个简单的论坛程序源码

using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace NetFocus.Web.Applications.Forum 
{
	public class Style : LiteralControl 
    {
        private const string linkFormat = "<link rel=\"stylesheet\" href=\"{0}\" type=\"text/css\" media=\"{1}\" />";

		[DefaultValue( "screen" ),]
		public virtual String Media {
			get {
				Object state = ViewState["Media"];
				if ( state != null ) {
					return (String)state;
				}
				return "screen";
			}
			set {
				ViewState["Media"] = value;
			}
		}

		public virtual String Href {
			get 
			{
				string state = (string) ViewState["Href"];
				if ( state != null )
				{
                    if (state.StartsWith("/") || state.StartsWith(".") || state.StartsWith("~") || state.StartsWith("http://"))
                        return ResolveUrl(state) + "?tag=" + Guid.NewGuid().ToString();
                    else
                        return ResolveUrl("~/Themes/Default/Styles/" + state) + "?tag=" + Guid.NewGuid().ToString();
				}
				else
					return "";
			}
			set 
			{
				ViewState["Href"] = value;
			}
		}

        protected override void Render(HtmlTextWriter writer)
        {
            if (!string.IsNullOrEmpty(Href))
            {
                writer.Write(linkFormat, Href, Media);
            }
        }
	}
}