微信支付.net官方坑太多，我们来精简

原文:微信支付.net官方坑太多，我们来精简

微信支付官方坑太多，我们来精简

我把官方的代码，打包成了 an.wxapi.dll。

里面主要替换了下注释。呵呵。然后修改了几个地方。

修改一、Config.cs

 namespace an.wxapi
 {
     public class WxPayConfig
     {

         public static string AppKey(string key)
         {
             return System.Configuration.ConfigurationManager.AppSettings[key];
         }

         /// <summary>
         /// APPID：绑定支付的APPID（必须配置）
         /// </summary>
         public static string APPID {
             get
             {
                 return AppKey("wx_appid");
             }
         }

         /// <summary>
         /// KEY：商户支付密钥，参考开户邮件设置（必须配置）
         /// </summary>
         public static string KEY
         {
             get {
                 return AppKey("wx_key");
             }
         }
         /// <summary>
         /// 商户号（必须配置）
         /// </summary>
         public static string MCHID
         {
             get {
                 return AppKey("wx_mchid");
             }
         }
         /// <summary>
         /// APPSECRET：公众帐号secert（仅JSAPI支付的时候需要配置）
         /// </summary>
         public static string APPSECRET
         {
             get {
                 return AppKey("wx_appsecret");
             }
         }
         /// <summary>
         /// 证书路径,注意应该填写绝对路径（仅退款、撤销订单时需要）
         /// </summary>
         public static string SSLCERT_PATH
         {
             get
             {
                 return AppKey("wx_sslcert_path");
             }
         }
         /// <summary>
         /// 证书密码，默认商户号为密码
         /// </summary>
         public static string SSLCERT_PASSWORD
         {
             get
             {
                 return AppKey("wx_sslcert_password");
             }
         }

         /// <summary>
         ///  支付结果通知回调url，用于商户接收支付结果
         /// </summary>
         public static string NOTIFY_URL
         {
             get
             {
                 return AppKey("wx_notify_url");
             }
         }

         /// <summary>
         /// 商户系统后台机器IP,此参数可手动配置也可在程序中自动获取
         /// </summary>
         public static string IP = "8.8.8.8";

         /// <summary>
         /// 代理服务器设置,默认IP和端口号分别为0.0.0.0和0，此时不开启代理（如有需要才设置）
         /// </summary>
         public static string PROXY_URL = "http://10.152.18.220:8080";

         /// <summary>
         ///上报信息配置，测速上报等级，0.关闭上报; 1.仅错误时上报; 2.全量上报
         /// </summary>
         public static int REPORT_LEVENL = ;

         /// <summary>
         /// 日志等级，0.不输出日志；1.只输出错误信息; 2.输出错误和正常信息; 3.输出错误信息、正常信息和调试信息
         /// </summary>

         public static int LOG_LEVENL
         {
             get
             {
                 string log_levenl = "";
                 if(AppKey("log_leven")!="")
                 {
                     log_levenl = AppKey("log_leven");
                 }
                 return Convert.ToInt32(log_levenl);
             }
         }

     }
 }

只是把静态的替换成可以从web.config里面调用的。

修改二、HttpService.cs

 namespace an.wxapi
 {
     /// <summary>
     /// http连接基础类，负责底层的http通信
     /// </summary>
     public class HttpService
     {

         public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
         {
             //直接确认，否则打不开
             return true;
         }

         public static string Post(string xml, string url, bool isUseCert, int timeout)
         {
             System.GC.Collect();//垃圾回收，回收没有正常关闭的http连接

             string result = "";//返回结果

             HttpWebRequest request = null;
             HttpWebResponse response = null;
             Stream reqStream = null;

             try
             {
                 //设置最大连接数
                 ServicePointManager.DefaultConnectionLimit = ;
                 //设置https验证方式
                 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
                 {
                     ServicePointManager.ServerCertificateValidationCallback =
                             new RemoteCertificateValidationCallback(CheckValidationResult);
                 }

                 /***************************************************************
                 * 下面设置HttpWebRequest的相关属性
                 * ************************************************************/
                 request = (HttpWebRequest)WebRequest.Create(url);

                 request.Method = "POST";
                 request.Timeout = timeout * ;

                 //设置代理服务器
                 //WebProxy proxy = new WebProxy();                          //定义一个网关对象
                 //proxy.Address = new Uri(WxPayConfig.PROXY_URL);              //网关服务器端口:端口
                 //request.Proxy = proxy;

                 //设置POST的数据类型和长度
                 request.ContentType = "text/xml";
                 byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);
                 request.ContentLength = data.Length;

                 //是否使用证书
                 if (isUseCert)
                 {
                     string path = HttpContext.Current.Request.PhysicalApplicationPath;
                     X509Certificate2 cert = new X509Certificate2(path + WxPayConfig.SSLCERT_PATH, WxPayConfig.SSLCERT_PASSWORD);
                     request.ClientCertificates.Add(cert);
                     Log.Debug("WxPayApi", "PostXml used cert");
                 }

                 //往服务器写入数据
                 reqStream = request.GetRequestStream();
                 reqStream.Write(data, , data.Length);
                 reqStream.Close();

                 //获取服务端返回
                 response = (HttpWebResponse)request.GetResponse();

                 //获取服务端返回数据
                 StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                 result = sr.ReadToEnd().Trim();
                 sr.Close();
             }
             catch (System.Threading.ThreadAbortException e)
             {
                 Log.Error("HttpService", "Thread - caught ThreadAbortException - resetting.");
                 Log.Error("Exception message: {0}", e.Message);
                 System.Threading.Thread.ResetAbort();
             }
             catch (WebException e)
             {
                 Log.Error("HttpService", e.ToString());
                 if (e.Status == WebExceptionStatus.ProtocolError)
                 {
                     Log.Error("HttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
                     Log.Error("HttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
                 }
                 throw new WxPayException(e.ToString());
             }
             catch (Exception e)
             {
                 Log.Error("HttpService", e.ToString());
                 throw new WxPayException(e.ToString());
             }
             finally
             {
                 //关闭连接和流
                 if (response != null)
                 {
                     response.Close();
                 }
                 if (request != null)
                 {
                     request.Abort();
                 }
             }
             return result;
         }

         /// <summary>
         /// 处理http GET请求，返回数据
         /// </summary>
         /// <param name="url">请求的url地址</param>
         /// <returns>http GET成功后返回的数据，失败抛WebException异常</returns>
         public static string Get(string url)
         {
             System.GC.Collect();
             string result = "";

             HttpWebRequest request = null;
             HttpWebResponse response = null;

             //请求url以获取数据
             try
             {
                 //设置最大连接数
                 ServicePointManager.DefaultConnectionLimit = ;
                 //设置https验证方式
                 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
                 {
                     ServicePointManager.ServerCertificateValidationCallback =
                             new RemoteCertificateValidationCallback(CheckValidationResult);
                 }

                 /***************************************************************
                 * 下面设置HttpWebRequest的相关属性
                 * ************************************************************/
                 request = (HttpWebRequest)WebRequest.Create(url);

                 request.Method = "GET";

                 //设置代理
                 //WebProxy proxy = new WebProxy();
                 //proxy.Address = new Uri(WxPayConfig.PROXY_URL);
                 //request.Proxy = proxy;

                 //获取服务器返回
                 response = (HttpWebResponse)request.GetResponse();

                 //获取HTTP返回数据
                 StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                 result = sr.ReadToEnd().Trim();
                 sr.Close();
             }
             catch (System.Threading.ThreadAbortException e)
             {
                 Log.Error("HttpService", "Thread - caught ThreadAbortException - resetting.");
                 Log.Error("Exception message: {0}", e.Message);
                 System.Threading.Thread.ResetAbort();
             }
             catch (WebException e)
             {
                 Log.Error("HttpService", e.ToString());
                 if (e.Status == WebExceptionStatus.ProtocolError)
                 {
                     Log.Error("HttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
                     Log.Error("HttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
                 }
                 throw new WxPayException(e.ToString());
             }
             catch (Exception e)
             {
                 Log.Error("HttpService", e.ToString());
                 throw new WxPayException(e.ToString());
             }
             finally
             {
                 //关闭连接和流
                 if (response != null)
                 {
                     response.Close();
                 }
                 if (request != null)
                 {
                     request.Abort();
                 }
             }
             return result;
         }
     }
 }

主要注释掉了设置代理服务器，基本上就注释掉这个就可以用了。

前台页面，我只用了三个（JsApiPayPage.aspx,ProductPage.aspx,ResultNotifyPage.aspx）

因为我只需要做微信里面的网页支付，其他很多功能我都不需要。所以。BIN文件夹，也只需要LitJSON.dll，RestSharp.dll,an.wxapi.dll(我上面打包的)

ProductPage.aspx(主要获取用户的openid和access_token)

 <%@ Page Language="C#" Inherits="an.web" %>
 <%@ Import Namespace="an.wxapi" %>
 <script runat="server">
     protected override void OnLoad(EventArgs e)
     {
         JsApiPay jsApiPay = new JsApiPay(this);
         jsApiPay.GetOpenidAndAccessToken();
         wx_openid = jsApiPay.openid;
     }
 </script>
 <!DOCTYPE html>
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
     <title></title>
 </head>
 <body>
        <h2>商品一：价格为：1分</h2>
        <p><a href="JsApiPayPage.aspx?openid=<%=wx_openid %>&total_fee=1&showwxpaytitle=1">去支付</a></p>
 </body>
 </html>

我比较懒，所以，我一般不用.cs文件，我喜欢写到一起。呵呵,（这样有个好处，不需要编译，即可运行。）

基本上是拿官方的过来，没怎么修改。

 protected void Page_Load(object sender, EventArgs e)
         {
             Log.Info(this.GetType().ToString(), "page load");
             if (!IsPostBack)
             {
                 JsApiPay jsApiPay = new JsApiPay(this);
                 try
                 {
                     //调用【网页授权获取用户信息】接口获取用户的openid和access_token
                     jsApiPay.GetOpenidAndAccessToken();

                     //获取收货地址js函数入口参数
                     //wxEditAddrParam = jsApiPay.GetEditAddressParameters();
                     ViewState["openid"] = jsApiPay.openid;
                 }
                 catch (Exception ex)
                 {
                     Response.Write("<span style='color:#FF0000;font-size:20px'>" + "页面加载出错，请重试" +ex.Message +"</span>");
                     //Button1.Visible = false;
                     //Button2.Visible = false;
                     //Label1.Visible = false;
                     //Label2.Visible = false;
                 }
             }
         }

官方用的是ViewState这玩意，会产生庞大的垃圾代码，（反正我也不知道这玩意，有啥子用）

我的做法是：

 namespace an
 {
     public class web : System.Web.UI.Page
     {
         public string wx_openid { get; set; }
         public string wxJsApiParam { get; set; }
     }
 }

直接在an.web里面定义下属性，不完啦。

JsApiPayPage.aspx(这个页面用来提交支付请求)

 <%@ Page Language="C#" Inherits="an.web" %>
 <%@ Import Namespace="an.wxapi" %>
 <script runat="server">
     protected override void OnLoad(EventArgs e)
     {
         string openid = Request.QueryString["openid"];
         string total_fee = Request.QueryString["total_fee"];

         JsApiPay jsApiPay = new JsApiPay(this);
         jsApiPay.openid = openid;
         jsApiPay.total_fee = int.Parse(total_fee);

         WxPayData unifiedOrderResult = jsApiPay.GetUnifiedOrderResult();
         wxJsApiParam = jsApiPay.GetJsApiParameters();//获取H5调起JS API参数
     }
 </script>
 <!DOCTYPE html>
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
     <meta http-equiv="content-type" content="text/html;charset=utf-8"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
     <title>微信支付样例-JSAPI支付</title>
 </head>

            <script type="text/javascript">

                //调用微信JS api 支付
                function jsApiCall()
                {
                    WeixinJSBridge.invoke(
                    'getBrandWCPayRequest',
                    <%=wxJsApiParam%>,//josn串
                     function (res)
                     {
                         WeixinJSBridge.log(res.err_msg);
                         alert(res.err_code + res.err_desc + res.err_msg);
                     }
                     );
                }

                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();
                    }
                }

      </script>

 <body>
     <input type="button" onclick="callpay()" value="立刻支付" />
 </body>
 </html>

ResultNotifyPage.aspx(回调)

 <%@ Page Language="C#" Inherits="an.web" %>
 <%@ Import Namespace="an.wxapi" %>
 <script runat="server">
     protected override void OnLoad(EventArgs e)
     {
         ResultNotify resultNotify = new ResultNotify(this);
         resultNotify.ProcessNotify();
     }
 </script>
 <!DOCTYPE html>
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
     <title></title>
 </head>
 <body>

 </body>
 </html>

很简单咯...

an.wxapi.dll 下载地址：http://files.cnblogs.com/files/ancms/an.wxapi.rar

本人很菜，希望以微薄之力帮助大家。

再次感谢：smallerpig