微信小程序支付前端源码

 //index.js
 Page({
   data: {

   },
   //点击支付按钮进行支付
   payclick: function () {
     var t = this;
     wx.login({
       //获取code换取openID
       success: function (res) {
         //code = res.code //返回code
         console.log("获取code");
         console.log(res.code);
         var opid = t.getOpenId(res.code);
       }
     })
   },
   //获取openID
   getOpenId: function (code) {
     var that = this;
     wx.request({
       url: "https://api.weixin.qq.com/sns/jscode2session?appid=你的appid&secret=AppSecret(小程序密钥)&js_code=" + code + "&grant_type=authorization_code",
       data: {},
       method: 'GET',
       success: function (res) {
         console.log("获取openid")
         console.log(res)
         that.setData({
           openid: res.data.openid,
           session_key: res.data.session_key
         })
         that.generateOrder(res.data.openid)
       },
       fail: function () {
         // fail
       },
       complete: function () {
         // complete
       }
     })
   },
   //生成商户订单
   generateOrder: function (openid) {
     var that = this
     wx.request({
       url: 'http://localhost:25492/wx/getda',//后台请求地址
       method: 'GET',
       data: {
         gfee: '商品价钱',
         gname: '商品名称',
         openId: openid
         //（商品价钱和商品名称根据自身需要是否传值, openid为必传）
       },
       success: function (res) {
         console.log("后台获取数据成功");
         console.log(res);
         var param = { "timeStamp": res.data.timeStamp, "package": res.data.package, "paySign": res.data.paySign, "signType": "MD5", "nonceStr": res.data.nonceStr };
          //发起支付
         that.pay(param);
       },
       fail: function (res) {
         console.log("向后台发送数据失败")
       }
     })
   },
   //支付
   pay: function (param) {
     var that = this;
     console.log("发起支付")
     console.log(param)
     wx.requestPayment({
       timeStamp: param.timeStamp,
       nonceStr: param.nonceStr,
       package: param.package,
       signType: param.signType,
       paySign: param.paySign,
       success: function (res) {
         console.log("success");
         console.log(res);
       },
       fail: function (res) {
         console.log("fail")
         console.log(res);
       },
       complete: function (res) {
         console.log("complete");
         console.log(res)
       }
     })
   }
 })

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微信支付小程序  C#后端