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 = 1;
       
        /// <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 = "0";
                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 = 200;
                //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 * 1000;

                //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, 0, 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 = 200;
                //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：https://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