.net后台以post方式调用http接口[转]

            string strResult = "";

            try
            {
                HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("http://localhost:8888/xxx.ashx?op=getuserlist&callback=xxx");

                myRequest.Method = "POST";

                myRequest.ContentType = "application/x-www-form-urlencoded";

                try
                {
                    HttpWebResponse HttpWResp = (HttpWebResponse)myRequest.GetResponse();

                    Stream myStream = HttpWResp.GetResponseStream();
                    StreamReader sr = new StreamReader(myStream, Encoding.UTF8);
                    StringBuilder strBuilder = new StringBuilder();
                    while (-1 != sr.Peek())
                    {
                        strBuilder.Append(sr.ReadLine());
                    }

                    strResult = strBuilder.ToString();
                    
                }
                catch (Exception exp)
                {

                    strResult = "错误：" + exp.Message;
                }


            }
            catch (Exception exp)
            {

                strResult = "错误：" + exp.Message;

            }

 js经常遇到无法跨域的情况，后台可以试试