Override the html form in ASP.NET for URL rewriting

If you are using URL rewriting, the ASP.NET HTML form tag doesn't support it. You have to override the form tag in order to make it work. It was a bug in ASP.NET 1.x and still haven't been fixed in 2.0. Here is the class I use when doing URL rewriting.

using System;
using System.Web;
using System.Web.UI;

public class Form : System.Web.UI.HtmlControls.HtmlForm
{
 protected override void RenderAttributes(HtmlTextWriter writer)
 {
  writer.WriteAttribute("name", this.Name);
  base.Attributes.Remove("name");

  writer.WriteAttribute("method", this.Method);
  base.Attributes.Remove("method");

  this.Attributes.Render(writer);

  writer.WriteAttribute("action", HttpUtility.HtmlEncode(Context.Request.RawUrl));
  base.Attributes.Remove("action");

  writer.WriteAttribute("onsubmit", "if (typeof(WebForm_OnSubmit) == 'function') return WebForm_OnSubmit();");
  base.Attributes.Remove("onsubmit");

  if (base.ID != null)
  writer.WriteAttribute("id", base.ClientID);
 }
}