public ActionResult JsApi(string code, string state){if (string.IsNullOrEmpty(code)){return Content("您拒绝了授权！");}if (!state.Contains("|")){//这里的state其实是会暴露给客户端的，验证能力很弱，这里只是演示一下//实际上可以存任何想传递的数据，比如用户ID，并且需要结合例如下面的Session["OAuthAccessToken"]进行验证return Content("验证失败！请从正规途径进入！1001");}try{//获取产品信息var stateData = state.Split('|');int productId = 0;ProductModel product = null;if (int.TryParse(stateData[0], out productId)){int hc = 0;if (int.TryParse(stateData[1], out hc)){var products = ProductModel.GetFakeProductList();product = products.FirstOrDefault(z => z.Id == productId);if (product == null || product.GetHashCode() != hc){return Content("商品信息不存在，或非法进入！1002");}ViewData["product"] = product;}}//通过，用code换取access_tokenvar openIdResult = OAuthApi.GetAccessToken(TenPayV3Info.AppId, TenPayV3Info.AppSecret, code);if (openIdResult.errcode != ReturnCode.请求成功){return Content("错误：" + openIdResult.errmsg);}string sp_billno = Request["order_no"];if (string.IsNullOrEmpty(sp_billno)){//生成订单10位序列号，此处用时间和随机数生成，商户根据自己调整，保证唯一sp_billno = string.Format("{0}{1}{2}", TenPayV3Info.MchId, DateTime.Now.ToString("yyyyMMdd"),TenPayV3Util.BuildRandomStr(10));}else{sp_billno = Request["order_no"];}var timeStamp = TenPayV3Util.GetTimestamp();var nonceStr = TenPayV3Util.GetNoncestr();var body = product == null ? "test" : product.Name;var price = product == null ? 100 : product.Price * 100;var xmlDataInfo = new TenPayV3UnifiedorderRequestData(TenPayV3Info.AppId, TenPayV3Info.MchId, body, sp_billno, price, Request.UserHostAddress, TenPayV3Info.TenPayV3Notify, TenPayV3Type.JSAPI, openIdResult.openid, TenPayV3Info.Key, nonceStr);var result = TenPayV3.Unifiedorder(xmlDataInfo);//调用统一订单接口//JsSdkUiPackage jsPackage = new JsSdkUiPackage(TenPayV3Info.AppId, timeStamp, nonceStr,);var package = string.Format("prepay_id={0}", result.prepay_id);ViewData["appId"] = TenPayV3Info.AppId;ViewData["timeStamp"] = timeStamp;ViewData["nonceStr"] = nonceStr;ViewData["package"] = package;ViewData["paySign"] = TenPayV3.GetJsPaySign(TenPayV3Info.AppId, timeStamp, nonceStr, package, TenPayV3Info.Key);return View();}catch (Exception ex){var msg = ex.Message;msg += "<br>" + ex.StackTrace;msg += "<br>==Source==<br>" + ex.Source;if (ex.InnerException != null){msg += "<br>===InnerException===<br>" + ex.InnerException.Message;}return Content(msg);}}

<xml>   <return_code><![CDATA[SUCCESS]]></return_code>   <return_msg><![CDATA[OK]]></return_msg>   <appid><![CDATA[wx2421b1c4370ec43b]]></appid>   <mch_id><![CDATA[10000100]]></mch_id>   <nonce_str><![CDATA[IITRi8Iabbblz1Jc]]></nonce_str>   <sign><![CDATA[7921E432F65EB8ED0CE9755F0E86D72F]]></sign>   <result_code><![CDATA[SUCCESS]]></result_code>   <prepay_id><![CDATA[wx201411101639507cbf6ffd8b0779950874]]></prepay_id>   <trade_type><![CDATA[APP]]></trade_type></xml>

                ViewData["appId"] = TenPayV3Info.AppId;ViewData["timeStamp"] = timeStamp;ViewData["nonceStr"] = nonceStr;ViewData["package"] = package;ViewData["paySign"] = TenPayV3.GetJsPaySign(TenPayV3Info.AppId, timeStamp, nonceStr, package, TenPayV3Info.Key);

wx.chooseWXPay({timestamp: 0, // 支付签名时间戳，注意微信jssdk中的所有使用timestamp字段均为小写。但最新版的支付后台生成签名使用的timeStamp字段名需大写其中的S字符nonceStr: '', // 支付签名随机串，不长于 32 位package: '', // 统一支付接口返回的prepay_id参数值，提交格式如：prepay_id=***）signType: '', // 签名方式，默认为'SHA1'，使用新版支付需传入'MD5'paySign: '', // 支付签名success: function (res) {
        if (res.err_msg == "get_brand_wcpay_request:ok") {//支付成功} else {          //支付失败}        // 使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回ok，但并不保证它绝对可靠。}
});