获取请求的Headers部分

System.Collections.Specialized.NameValueCollection namevalue=Request.Headers;
       if (namevalue != null)
       {
           //for (int i = 0; i < namevalue.Count; i++)
           //{
           //    Response.Output.WriteLine(namevalue[i]+"<br/>");
           //}
           foreach (string str in namevalue.AllKeys)
           {
               Response.Output.WriteLine("键：" + str + ";值：" + namevalue[str]);
           }
       }