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：

 1 public class GetOpenid : IHttpHandler  
 2     {  
 3         public string openid { get; set; }  
 4   
 5         public void ProcessRequest(HttpContext context)  
 6         {  
 7               
 8             string code = HttpContext.Current.Request.QueryString["code"];  
 9             WxPayData data = new WxPayData();  
10             data.SetValue("appid", WxPayConfig.APPID);  
11             data.SetValue("secret", WxPayConfig.APPSECRET);  
12             data.SetValue("code", code);  
13             data.SetValue("grant_type", "authorization_code");  
14             string url = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data.ToUrl();  
15   
16             //请求url以获取数据  
17             string result = HttpService.Get(url);  
18   
19             Log.Debug(this.GetType().ToString(), "GetOpenidAndAccessTokenFromCode response : " + result);  
20   
21             //保存access_token，用于收货地址获取  
22             JsonData jd = JsonMapper.ToObject(result);  
23             //access_token = (string)jd["access_token"];  
24   
25             //获取用户openid  
26             openid = (string)jd["openid"];  
27             context.Response.Write(openid);//获取H5调起JS API参数  
28             
29         }

在pay.ashx中加入代码如下：

 1 public class pay : IHttpHandler  
 2    {  
 3         
 4        public void ProcessRequest(HttpContext context)  
 5        {                
 6            context.Response.ContentType = "text/plain";  
 7             
 8            string openid = HttpContext.Current.Request.QueryString["openid"];  
 9            string total_fee = HttpContext.Current.Request.QueryString["total_fee"];  
10            JsApiPay jsApiPay = new JsApiPay(context);  
11            jsApiPay.openid = openid;  
12            jsApiPay.total_fee = int.Parse(total_fee);  
13            WxPayData unifiedOrderResult = jsApiPay.GetUnifiedOrderResult();  
14            context.Response.Write(jsApiPay.GetJsApiParameters());//获取H5调起JS API参数  
15        }

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：

  1 wxpay: function () { 
  2     var that = this 
  3     //登陆获取code 
  4     wx.login({ 
  5       success: function (res) { 
  6         console.log(res.code) 
  7         //获取openid 
  8         that.getOpenId(res.code) 
  9       } 
 10     }); 
 11   }, 
 12   getOpenId: function (code) { 
 13 //获取openID 
 14       
 15     var that = this; 
 16     wx.request({ 
 17       url: 'http://*******/WxPayAPI/GetOpenid.ashx?code='+ code ,  //改为自己的域名
 18       data: {}, 
 19     //  method: 'GET', 
 20       success: function (res) { 
 21       var a12=res.data 
 22       that.generateOrder(a12) 
 23       //console.log(a12) 
 24       }, 
 25       fail: function () { 
 26         // fail 
 27       }, 
 28       complete: function () { 
 29         // complete 
 30       } 
 31     }) 
 32   }, 
 33 /**生成商户订单 */ 
 34   generateOrder: function (openid) { 
 35     var that = this; 
 36     //console.log(openid) 
 37     //统一支付 
 38     wx.request({ 
 39       url: 'http://*******/WxPayAPI/pay.ashx',  //改为自己的域名
 40       //method: 'GET', 
 41       data: { 
 42         total_fee: 1,//1分 
 43         openid: openid, 
 44       }, 
 45       header: { 
 46         'content-type': 'application/json' 
 47       }, 
 48    
 49       success: function (res) { 
 50    
 51         var pay = res.data 
 52         //发起支付 
 53            
 54         var timeStamp = pay.timeStamp; 
 55         var packages = pay.package; 
 56         var paySign = pay.paySign; 
 57         var nonceStr = pay.nonceStr; 
 58         var param = { "timeStamp": timeStamp, "package": packages, "paySign": paySign, "signType": "MD5", "nonceStr": nonceStr }; 
 59          
 60         that.pay(param) 
 61       }, 
 62     }) 
 63   }, 
 64    
 65   /* 支付   */ 
 66   pay: function (param) { 
 67    
 68     wx.requestPayment({ 
 69       timeStamp: param.timeStamp, 
 70       nonceStr: param.nonceStr, 
 71       package: param.package, 
 72       signType: param.signType, 
 73       paySign: param.paySign, 
 74       success: function (res) { 
 75         // success 
 76          
 77         wx.navigateBack({ 
 78           delta: 1, // 回退前 delta(默认为1) 页面 
 79           success: function (res1) { 
 80             wx.showToast({ 
 81               title: '支付成功', 
 82               icon: 'success', 
 83               duration: 2000 
 84             }); 
 85              
 86           }, 
 87           fail: function () { 
 88             // fail 
 89                
 90           }, 
 91           complete: function () { 
 92                
 93           } 
 94         }) 
 95       }, 
 96       fail: function (res) { 
 97         // fail 
 98       }, 
 99       complete: function () { 
100         // complete 
101       } 
102     }) 
103   },