/// <summary>  /// 獲取微信支付相關信息  /// </summary>  /// <returns></returns>  [HttpGet]  public virtual ActionResult Index()  {   JsApiPay jsApiPay = new JsApiPay();   OStudent model = null;   try   {    //調用【網頁授權獲取用戶信息】接口獲取用戶的openid和access_token    jsApiPay.GetOpenidAndAccessToken();    //獲取微信支付者公共id    jsApiPay.openid = jsApiPay.openid;    string ID = Request["ID"]; //如果要獲取頁面傳遞過來的值,需修改GetOpenidAndAccessToken()方法里面的代碼,加上Request.Url.Query獲取參數    model = OStudentSiteService.GetByKey(id).AppendData as OStudent;    if (model != null)    {     jsApiPay.total_fee = 1;//測試 訂單金額(1表示分,正式金額要*100)     jsApiPay.Order_ID = model.order_ID; //訂單號(自己定義訂單號)         }    //JSAPI支付預處理    //調用統一下單，獲得下單結果    WxPayData unifiedOrderResult = jsApiPay.GetUnifiedOrderResult();    //從統一下單成功返回的數據中獲取微信瀏覽器調起jsapi支付所需的參數    var wxJsApiParam = jsApiPay.GetJsApiParameters(); //獲取到的是json格式字符串    ViewBag.wxJsApiParam = wxJsApiParam; //前臺頁面js調用    Log.Debug(this.GetType().ToString(), "wxJsApiParam : " + wxJsApiParam);   }   catch (Exception ex)   {    Response.Write(ex.Message + "," + ex.Source);    Response.End();   }   return View(model);  }    //修改支付方式  [HttpPost]  public virtual JsonResult PayMethod()  {   AjaxJsonResult ajax = new AjaxJsonResult() { err = true, msg = string.Empty, timeout = 3 };   string id = Request.Form["id"];   string payMethod = Request.Form["payMethod"];   var model = (Project.Core.Models.Model.OStudent)OStudentSiteService.GetByKey(id).AppendData;   model.payMethod = payMethod; //支付方式   OperationResult result = OStudentSiteService.Modify(model);   if (result.ResultType == OperationResultType.Success)   {    ajax.err = false;    ajax.msg = "操作成功";   }   return Json(ajax);  }  /// <summary>  /// 修改支付狀態  /// </summary>  /// <param name="userID"></param>  /// <returns></returns>  [HttpPost]  public virtual string EditPayStatus(Guid userID)  {   string msg = "error";   var model = OStudentSiteService.GetByKey(userID).AppendData as OStudent;   model.Status = (int)X.Project.Site.Models.Enum.PayStatus.Success; //付款成功   OperationResult result = OStudentSiteService.Modify(model);   if (result.ResultType == OperationResultType.Success)   {    msg = "ok";       }   return msg;  }    前臺Index.chtml視圖頁面JS代碼   <script type="text/javascript">  var _wxJsApiParam = eval('(@Html.Raw(ViewBag.wxJsApiParam))');  function callpay() {   //選擇支付方式   var payMethod = $("input[name='PayMethod']:checked").val();   if (payMethod == "" || payMethod == null) {    layer.msg("請選擇支付方式", function () { })    return false;   }   $.ajax({    type: "POST",    dataType: "JSON",    url: '@Url.Action("PayMethod", "WeChatWeb")',    data: {     payMethod: payMethod,     id: '@Model.ID'    },    success: function (data) {     //表示修改支付方式成功     if (!data.err) {      //1表示微信支付,則調用微信支付      if (payMethod == "1") {       if (typeof WeixinJSBridge == "undefined") {        if (document.addEventListener) {         document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);        }        else if (document.attachEvent) {         document.attachEvent('WeixinJSBridgeReady', jsApiCall);         document.attachEvent('onWeixinJSBridgeReady', jsApiCall);        }       }       else {        jsApiCall();       }      } else if (payMethod == "2") {       layer.alert('恭喜您,操作成功!', function () {         window.location.href = "@Url.Action(MVC.Default.Index())" ; //操作成功后的跳轉頁面       });      }    } else {     layer.msg("操作失敗", function () { })     return false;    }    }   }); } //調用微信JS api 支付 function jsApiCall() {  WeixinJSBridge.invoke('getBrandWCPayRequest', _wxJsApiParam,    function (res) {     if (res.err_msg == "get_brand_wcpay_request:cancel") {       layer.msg("已取消支付", function () { });      return false;     } else if (res.err_msg == "get_brand_wcpay_request:ok") {      //支付成功      //ajax      $.ajax({       type: "POST",       dataType: "text",       url: '@Url.Action("EditPayStatus", "WeChatWeb")',       data: {        userID: '@Model.ID'       },       error: function (request) {         layer.msg("服務器錯誤！", function () { });        return false;       },       success: function (data) {        window.location.href = "@Url.Action(MVC.Default.Index())"; //支付成功后跳轉的頁面       }      }); //ajax end      }    });   }  </script>