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 
      } 
    }) 
  },