public static string getHttp(IDictionary <string, string> parameters, Encoding charset) { string retString = null; Hashtable ht = new Hashtable(); foreach (string key in parameters.Keys) { if (!key.Equals("orderText")) { ht.Add(key.ToLower(), parameters[key]); } } string mac = EncryptionMD5.MD5(ht, SysConfigHelper.readerNode("macKey")); if (!parameters.ContainsKey("mac")) { parameters.Add("mac".ToLower(), mac); } else { parameters["mac"] = mac; } string url = SysConfigHelper.readerNode("mechineSign"); url = url + "?"; StringBuilder buffer = new StringBuilder(); //如果需要POST数据 if (!(parameters == null || parameters.Count == 0)) { int i = 0; foreach (string key in parameters.Keys) { if (i > 0) { buffer.AppendFormat("&{0}={1}", key, parameters[key]); } else { buffer.AppendFormat("{0}={1}", key, parameters[key]); } i++; } } retString = getHttp2(url, buffer.ToString(), charset); return(retString); }