微信支付 api demo 版本，可根据个人实际情况集成自己业务部分。

if (Request.QueryString["code"] == null || Request.QueryString["code"] == "") { string host = Request.Url.Host; string path = Request.Path; string redirect_uri = HttpUtility.UrlEncode("http://" + host + path); Log.Debug(this.GetType().ToString(), "Current page URL : " + redirect_uri); WxPayData data = new WxPayData(); data.SetValue("appid", WxPayConfig.APPID); data.SetValue("redirect_uri", redirect_uri); data.SetValue("response_type", "code"); data.SetValue("scope", "snsapi_base"); data.SetValue("state", "STATE" + "#wechat_redirect"); string url = "https://open.weixin.qq.com/connect/oauth2/authorize?" + data.ToUrl(); Log.Debug(this.GetType().ToString(), "Will Redirect to URL : " + url); Response.Redirect(url); //System.Environment.Exit(0); Response.End(); Log.Debug(this.GetType().ToString(), "If print this sentence, it is error!!!"); } else { string code = Request.QueryString["code"]; Log.Debug(this.GetType().ToString(), "Get code : " + code); //构造获取openid及access_token的url WxPayData data3 = new WxPayData(); data3.SetValue("appid", WxPayConfig.APPID); data3.SetValue("secret", WxPayConfig.APPSECRET); data3.SetValue("code", code); data3.SetValue("grant_type", "authorization_code"); string url3 = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data3.ToUrl(); //请求url以获取数据 HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url3); objRequest.Method = "GET"; WebProxy proxy = new WebProxy(); //定义一个网关对象 proxy.Address = new Uri("http://10.152.18.220:8080"); //网关服务器端口:端口 objRequest.Proxy = proxy; string result = ""; HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse(); using (StreamReader sr = new StreamReader(objResponse.GetResponseStream())) { result = sr.ReadToEnd(); sr.Close(); } Log.Debug(this.GetType().ToString(), "Get access_token : " + result); //保存access_token，用于收货地址获取 JsonData jd = JsonMapper.ToObject(result); string access_token = (string)jd["access_token"]; string openid = (string)jd["openid"]; Log.Debug(this.GetType().ToString(), "Get openid : " + openid); //统一下单 WxPayData data2 = new WxPayData(); data2.SetValue("body", "test");// data2.SetValue("attach", "test"); data2.SetValue("out_trade_no", WxPayApi.GenerateOutTradeNo()); data2.SetValue("total_fee", 1); data2.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss")); data2.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss")); data2.SetValue("goods_tag", "test"); data2.SetValue("trade_type", "JSAPI"); data2.SetValue("openid", openid); WxPayData result2 = WxPayApi.UnifiedOrder(data2); if (!result2.IsSet("appid") || !result2.IsSet("prepay_id") || result2.GetValue("prepay_id").ToString() == "") { Log.Error(this.GetType().ToString(), "UnifiedOrder response error!"); throw new WxPayException("UnifiedOrder response error!"); } WxPayData jsApiParam = new WxPayData(); jsApiParam.SetValue("appId", result2.GetValue("appid")); jsApiParam.SetValue("timeStamp", WxPayApi.GenerateTimeStamp()); jsApiParam.SetValue("nonceStr", WxPayApi.GenerateNonceStr()); jsApiParam.SetValue("package", "prepay_id=" + result2.GetValue("prepay_id")); jsApiParam.SetValue("signType", "MD5"); jsApiParam.SetValue("paySign", jsApiParam.MakeSign()); string parameters = jsApiParam.ToJson(); Log.Info(this.GetType().ToString(), "Get jsApiParam : " + parameters); wxJsApiParam = parameters; //获取收货地址 string parameter2 = null; try { WxPayData signData = new WxPayData(); signData.SetValue("appid", WxPayConfig.APPID); signData.SetValue("url", Request.Url.ToString()); signData.SetValue("timestamp", WxPayApi.GenerateTimeStamp()); signData.SetValue("nonce_str", WxPayApi.GenerateNonceStr()); signData.SetValue("accesstoken", access_token); string param = signData.ToUrl(); Log.Info(this.GetType().ToString(), "GetEditAddressParam param : " + param); string addrSign = FormsAuthentication.HashPasswordForStoringInConfigFile(param, "SHA1"); WxPayData afterData = new WxPayData(); afterData.SetValue("appId", WxPayConfig.APPID); afterData.SetValue("scope", "jsapi_address"); afterData.SetValue("signType", "sha1"); afterData.SetValue("addrSign", addrSign); afterData.SetValue("timeStamp", signData.GetValue("timestamp")); afterData.SetValue("nonceStr", signData.GetValue("nonce_str")); parameter2 = afterData.ToJson(); } catch (Exception ex) { Log.Error(this.GetType().ToString(), ex.ToString()); } Log.Info(this.GetType().ToString(), "Get EditAddressParam : " + parameter2); wxEditAddrParam = parameter2; }