信小程序支付(C#后台+前台)

今天为大家带来比较简单的支付后台处理

首先下载官方的c#模板（WxPayAPI），将模板（WxPayAPI）添加到服务器上，然后在WxPayAPI项目目录中添加两个“一般处理程序” （改名为GetOpenid.ashx、pay.ashx）

之后打开business目录下的JsApiPay.cs，在JsApiPay.cs中修改如下两处

然后在GetOpenid.ashx中加入代码如下：

 public class GetOpenid : IHttpHandler
     {
         public string openid { get; set; }  

         public void ProcessRequest(HttpContext context)
         {  

             string code = HttpContext.Current.Request.QueryString["code"];
             WxPayData data = new WxPayData();
             data.SetValue("appid", WxPayConfig.APPID);
             data.SetValue("secret", WxPayConfig.APPSECRET);
             data.SetValue("code", code);
             data.SetValue("grant_type", "authorization_code");
             string url = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data.ToUrl();  

             //请求url以获取数据
             string result = HttpService.Get(url);  

             Log.Debug(this.GetType().ToString(), "GetOpenidAndAccessTokenFromCode response : " + result);  

             //保存access_token，用于收货地址获取
             JsonData jd = JsonMapper.ToObject(result);
             //access_token = (string)jd["access_token"];  

             //获取用户openid
             openid = (string)jd["openid"];
             context.Response.Write(openid);//获取H5调起JS API参数  

         }

在pay.ashx中加入代码如下：

 public class pay : IHttpHandler
    {  

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";  

            string openid = HttpContext.Current.Request.QueryString["openid"];
            string total_fee = HttpContext.Current.Request.QueryString["total_fee"];
            JsApiPay jsApiPay = new JsApiPay(context);
            jsApiPay.openid = openid;
            jsApiPay.total_fee = int.Parse(total_fee);
            WxPayData unifiedOrderResult = jsApiPay.GetUnifiedOrderResult();
            context.Response.Write(jsApiPay.GetJsApiParameters());//获取H5调起JS API参数
        }

然后发布就可以了（记得将相关的信息appid等填好）

微信小程序的代码如下：

 wxpay: function () {
     var that = this
     //登陆获取code
     wx.login({
       success: function (res) {
         console.log(res.code)
         //获取openid
         that.getOpenId(res.code)
       }
     });
   },
   getOpenId: function (code) {
 //获取openID 

     var that = this;
     wx.request({
       url: 'http://*******/WxPayAPI/GetOpenid.ashx?code='+ code ,  //改为自己的域名
       data: {},
     //  method: 'GET',
       success: function (res) {
       var a12=res.data
       that.generateOrder(a12)
       //console.log(a12)
       },
       fail: function () {
         // fail
       },
       complete: function () {
         // complete
       }
     })
   },
 /**生成商户订单 */
   generateOrder: function (openid) {
     var that = this;
     //console.log(openid)
     //统一支付
     wx.request({
       url: 'http://*******/WxPayAPI/pay.ashx',  //改为自己的域名
       //method: 'GET',
       data: {
         total_fee: 1,//1分
         openid: openid,
       },
       header: {
         'content-type': 'application/json'
       }, 

       success: function (res) { 

         var pay = res.data
         //发起支付 

         var timeStamp = pay.timeStamp;
         var packages = pay.package;
         var paySign = pay.paySign;
         var nonceStr = pay.nonceStr;
         var param = { "timeStamp": timeStamp, "package": packages, "paySign": paySign, "signType": "MD5", "nonceStr": nonceStr }; 

         that.pay(param)
       },
     })
   }, 

   /* 支付   */
   pay: function (param) { 

     wx.requestPayment({
       timeStamp: param.timeStamp,
       nonceStr: param.nonceStr,
       package: param.package,
       signType: param.signType,
       paySign: param.paySign,
       success: function (res) {
         // success 

         wx.navigateBack({
           delta: 1, // 回退前 delta(默认为1) 页面
           success: function (res1) {
             wx.showToast({
               title: '支付成功',
               icon: 'success',
               duration: 2000
             }); 

           },
           fail: function () {
             // fail 

           },
           complete: function () { 

           }
         })
       },
       fail: function (res) {
         // fail
       },
       complete: function () {
         // complete
       }
     })
   },