ASP.NET 取得客户端信息

using System.Collections.Specialized  int loop1, loop2;
  NameValueCollection coll;
  // Load ServerVariable collection into NameValueCollection object.
  coll=Request.ServerVariables;
  // Get names of all keys into a string array.
  String[] arr1 = coll.AllKeys;
  for (loop1 = 0; loop1 < arr1.Length; loop1++)
  {
  Response.Write("Key: " + arr1[loop1] + "<br>");
  String[] arr2=coll.GetValues(arr1[loop1]);
  for (loop2 = 0; loop2 < arr2.Length; loop2++)
  {
  Response.Write("Value " + loop2 + ": " + arr2[loop2] + "<br>");
  }
  }
  ====以下是一个取得ip和操作系统以及浏览器的例子=========
  PRivate string getIp()
  {/*穿过代理服务器取远程用户真实IP地址:*/
  if(Request.ServerVariables["HTTP_VIA"]!=null)
  return Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
  else
  return Request.ServerVariables["REMOTE_ADDR"].ToString();
  }
  Label2.Text =getIp();
  HttpBrowserCapabilities bc = new HttpBrowserCapabilities();
  bc = Request.Browser;
  string xitong ="你的操作系统为";
  Label3.Text=xitong+bc.Platform + " 浏览器类型:" + bc.Type;