var item = new HttpItem()

             {

                 URL = @"http://www.xxx.com/msg/basic/?a=sendmsg",

                 //Encoding = System.Text.Encoding.GetEncoding("GBK"),

                 Method = "post",

                 //IsToLower = false,

                 Expect100Continue = false,

                 //Cookie = cookie,

                 Postdata = "src=send&contents=" + content + "&disp_uid=" + uid,

                 Timeout = ,

                 ReadWriteTimeout = ,

                 ProxyIp = proxyIp,

                 UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0",

                 ContentType = "application/x-www-form-urlencoded",

                 CookieCollection = cookieCollection,

                 Allowautoredirect = true,

             };

             var httpResult = http.GetHtml(item);