ASP.NET自訂控制項開發設計介面（設計時介面與運行時介面不同）

設計類:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
namespace ServerControl2
{
public   class Des:System.Web.UI.Design.ControlDesigner
    {
public override string GetDesignTimeHtml()
      {
          StringWriter sw = new StringWriter();
          HtmlTextWriter tw = new HtmlTextWriter(sw);
          HyperLink hl = new HyperLink();
          hl.Text = "Hello, Control";
          hl.NavigateUrl = "http://www.microsoft.com/china/msdn";
          hl.RenderControl(tw);
          tw.Write(HtmlTextWriter.SpaceChar);
          Label lbl = new Label();
          lbl.BackColor = System.Drawing.Color.LemonChiffon;
          lbl.Text = hl.NavigateUrl;
          lbl.RenderControl(tw);
return sw.ToString();
      }
    }
}

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

namespace ServerControl2
{

    [Designer("ServerControl2.Des,ServerControl2"),DefaultProperty("Text")]
    [ToolboxData("<{0}:ServerControl1 runat=server></{0}:ServerControl1>")]
public class ServerControl1 : WebControl,IPostBackEventHandler
    {
        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        [Localizable(true)]
public string Text
        {
get
            {
                String s = (String)ViewState["Text"];
return "自訂控制項aa";
            }
set
            {
                ViewState["Text"] = value;
            }
        }
public int Speed
        {
get;
set;
        }

protected override void RenderContents(HtmlTextWriter output)
        {
            output.Write(Text);
            output.Write(string.Format(@" <marquee width=400 scrollamount='{0}' behavior=alternate direction=left align=middle>彈來彈去跑馬燈!</marquee>",Speed));

        }
protected override void OnPreRender(EventArgs e)
        {

        }
protected override void AddAttributesToRender(HtmlTextWriter writer)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Onclick,"Javascript:"+Page.GetPostBackEventReference(this));
            writer.AddStyleAttribute(HtmlTextWriterStyle.BackgroundColor, "red");
base.AddAttributesToRender(writer);
        }
public event EventHandler click;
public void RaisePostBackEvent(string eventArgument)
        {
            Onclick(EventArgs.Empty);
        }
protected virtual void Onclick(EventArgs ex)
      {
if (click!=null)
    {
         click(this,ex);
    }
//  HttpContext.Current.Response.Redirect("http://www.baidu.com");

      }
    }
}