asp.net mvc内微信pc端、H5、JsApi支付方式总结

转自：http://www.80cxy.com/Blog/ArticleView?arId=201912122203555530g0wwI8

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微信提供了各种支付方式，有针对手机APP开发的支付方式，有针对pc web端的，手机端的等，pc端支付使用场景是在pc端完整内使用的支付方式，JsApi只能在微信内被调用，H5不限于微信内使用，手机端浏览器内也可以使用，个人理解的不知道对不对，本文主要介绍pc端、H5、JsApi支付方式，废话不多说直接上代码，代码只提供JsApi部分，pc端web及H5端的代码直接下载附件，附件内包括全部代码及相关类库。

微信JsApi支付之前必须通过后台获取支付调起参数，参数获得后通过js方法调起支付才行。

一、前端支付Js代码

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<script>         var _wxJsApiParam;         function callpay() {             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();             }         }         //调用微信JS api 支付         function jsApiCall() {             WeixinJSBridge.invoke('getBrandWCPayRequest', _wxJsApiParam,               function (res) {                   if (res.err_msg == "get_brand_wcpay_request:cancel") {                       $.messager.alert('提示信息', '支付已经取消！', 'info');                       return false;                   } else if (res.err_msg == "get_brand_wcpay_request:ok") {                       //支付成功                       $.messager.alert('提示信息', '支付成功！', 'info');                   }               });         }         //获取微信支付参数         function rePay(obj) {             //调起微信公众号JsApi支付             $.ajax({                 url: "/Pay/RePayJsApi",                 type: 'post',                 cache: false,                 dataType: 'html',                 data: {                     OrderId: obj                 },                 success: function (data) {                     if (data != "Error") {                         _wxJsApiParam = eval('(' + data + ')');                         callpay();                     }                     else $.messager.alert('提示信息', '生成订单失败！', 'info');                 },                 error: function (XMLHttpRequest, textStatus, errorThrown) {                     alert(textStatus); return;                 }             });         }     </script>

二、后台代码

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/// <summary> /// 重新发起支付 /// </summary> /// <param name="tmpModel"></param> /// <returns></returns> [HttpPost] public ActionResult RePayJsApi() {     try     {         string orderId = ClassesLib.GetString("OrderId");         string newOrderId = ClassesLib.GetIdByTime();         var model = db.MEMBER_ORDER.Find(orderId);         model.ORDERID = newOrderId;         db.SaveChanges();         //登录判断         if (ClassesLib.WxSessionIsNull())         {             return Content("<script>alert('登录超时,请重新登录！');window.location.href='/WeiXin/Login?returnUrl=/WeiXin/ViewProduct?objId=" + model.OBJECTID + "&salesmanId=" + model.SALEID + "'</script>");         }         //调用支付         JsApiPay jsApiPay = new JsApiPay();         jsApiPay.bodyStr = model.OBJECTNAME + "-" + ClassesLib.getWxLoginName();         jsApiPay.attachStr = model.OBJECTNAME + "-" + ClassesLib.getWxLoginName();         jsApiPay.orderId = newOrderId;         jsApiPay.openid = model.OPENID;         jsApiPay.total_fee = Convert.ToInt32(model.MONEY * 100);//测试 订单金额(1表示分,正式金额要*100)         //JSAPI支付预处理         //调用统一下单，获得下单结果         WxPayData unifiedOrderResult = jsApiPay.GetUnifiedOrderResult();         //从统一下单成功返回的数据中获取微信浏览器调起jsapi支付所需的参数         var wxJsApiParam = jsApiPay.GetJsApiParameters(); //获取到的是json格式字符串         return Content(wxJsApiParam);     }     catch (Exception e)     {         return Content("Error");     } } [HttpPost] public virtual ActionResult JsApiNotifyUrl() {     ClassesLib.InsertLog("支付测试1", "支付");     WxPayData notifyData = GetNotifyData();     //检查支付结果中transaction_id是否存在     if (!notifyData.IsSet("transaction_id"))     {         //若transaction_id不存在，则立即返回结果给微信支付后台         WxPayData res = new WxPayData();         res.SetValue("return_code", "FAIL");         res.SetValue("return_msg", "支付结果中微信订单号不存在");         Log.Error(this.GetType().ToString(), "The Pay result is error : " + res.ToXml());         return Content("支付结果中微信订单号不存在");     }     ClassesLib.InsertLog("支付测试2", "支付");     string transaction_id = notifyData.GetValue("transaction_id").ToString();     string trade_no = notifyData.GetValue("out_trade_no").ToString();     //查询订单，判断订单真实性     if (!QueryOrder(transaction_id))     {         //若订单查询失败，则立即返回结果给微信支付后台         WxPayData res = new WxPayData();         res.SetValue("return_code", "FAIL");         res.SetValue("return_msg", "订单查询失败");         Log.Error(this.GetType().ToString(), "Order query failure : " + res.ToXml());         return Content("订单查询失败");     }     //查询订单成功     else     {         ClassesLib.InsertLog("支付测试3", "支付");         WxPayData res = new WxPayData();         res.SetValue("return_code", "SUCCESS");         res.SetValue("return_msg", "OK");         Log.Info(this.GetType().ToString(), "order query success : " + res.ToXml());         //更新支付状态         var model = db.MEMBER_ORDER.Where(c => c.ORDERID == trade_no).FirstOrDefault();         if (model != null && model.PAYSTATE == "未支付")         {             model.PAYSTATE = "已支付";             model.PAYDATE = DateTime.Now;             //发送支付成功提示，通过微信消息通知收银员已经收到付款             SendTemplateMessage.SendMessage("oPCLNv5B1T8kYM5AYgXWHOiD24_s", "您好，用户" + model.MEMBERNAME + "已购买服务", model.OBJECTNAME, (Convert.ToDouble(model.MONEY) * 0.01).ToString() + "元", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));             db.SaveChanges();         }         return Content("支付成功" + res.ToXml());     } }