public string GetOpenid(string code) { string url = ""; Sys_WxChatConfigBll swccb = new Sys_WxChatConfigBll(); Sys_WxChatConfig wc = swccb.Query(" and acode='0001'"); string getAccessTokenUrl = " https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code"; string respText = ""; if (wc != null) { url = string.Format(getAccessTokenUrl, wc.appid, wc.appsec, code); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); HttpWebResponse response = (HttpWebResponse)request.GetResponse(); using (Stream resStream = response.GetResponseStream()) { StreamReader reader = new StreamReader(resStream, Encoding.Default); respText = reader.ReadToEnd(); resStream.Close(); } int start = respText.IndexOf("openid"); int end = respText.IndexOf("scope"); start += 15; end -= 3; respText = respText.Substring(start, end - start); } else { respText = ""; } return(respText); }