asp.net微信开发第一篇----开发者接入

以上是微信官方后台需要设置的，

以下是我们自己的程序页面对接配置的一些设置：

字段说明：

平台名称：看图片，关注公众号时显示的欢迎关注（平台名称）

APPID：这个必须和微信官网的一致

Appsecret:这个必须和微信官网的一致

Token：这个必须和微信官网的一致

授权域名：这个必须是微信官网设置的授权回调页面地址是一样的，

功能说明：这个就是关注公众号时显示的图文消息下的那几段话，

官方网址：这个就是点击关注公众号时显示的图文消息的跳转地址

关注时的图片：这个就是点击关注公众号时显示的图文消息的图片

处理方法：把字段信息保存到本地数据库，这里呢，我设置了两个，如果你关注了微信测试号本地测试时使用另外一个，真正的项目就切换到另外一个

设置好以后，还没有启用这个配置，只需点击一下设置默认（只是将状态更改为1而已）即可，随后，在页面调用的时候，调用微信服务类

代码如下：

  /// <summary>
        /// 获取微信公众号的AppId
        /// </summary>
        public static string GetAppId()
        {
            //获取使用中的微信配置信息
            WeChatConfigService wcf = new WeChatConfigService();
            WeChatConfigInfo wcfInfo = wcf.GetWeChatConfigInfoByInUse();
            if (wcfInfo != null)
            {
                return wcfInfo.wechat_AppId.ToString();
            }
            return null; ;
        }

        /// <summary>
        /// 获取微信公众号的AppSecret
        /// </summary>
        public static string GetAppSecret()
        {
            //获取使用中的微信配置信息
            WeChatConfigService wcf = new WeChatConfigService();
            WeChatConfigInfo wcfInfo = wcf.GetWeChatConfigInfoByInUse();
            if (wcfInfo != null)
            {
                return wcfInfo.wechat_AppSecret.ToString();
            }
            return null; ;
        }

        /// <summary>
        /// 获取本地设置的Token
        /// </summary>
        public static string GetToken()
        {
            //获取使用中的微信配置信息
            WeChatConfigService wcf = new WeChatConfigService();
            WeChatConfigInfo wcfInfo = wcf.GetWeChatConfigInfoByInUse();
            if (wcfInfo != null)
            {
                return wcfInfo.wechat_Token.ToString();
            }
            return null; ;
        }

        /// <summary>
        /// 获取网页授权域名
        /// </summary>
        public static string GetpostUrl()
        {
            //获取使用中的微信配置信息
            WeChatConfigService wcf = new WeChatConfigService();
            WeChatConfigInfo wcfInfo = wcf.GetWeChatConfigInfoByInUse();
            if (wcfInfo != null)
            {
                return wcfInfo.wechat_PostUrl.ToString();
            }
            return null; ;
        }

        /// <summary>
        /// 获取通行证
        /// </summary>
        /// <returns></returns>
        public  string GetAccessToken()
        {
            //获取使用中的微信配置信息
            WeChatConfigService wcf = new WeChatConfigService();
            WeChatConfigInfo wcfInfo = wcf.GetWeChatConfigInfoByInUse();
            string appid = "";
            string secret = "";
            if (wcfInfo != null)
            {
                //初始化微信配置信息
                appid = wcfInfo.wechat_AppId.ToString();
                secret = wcfInfo.wechat_AppSecret.ToString();
            }

            string url_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appid+"&secret="+secret;
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url_token);
            myRequest.Method = "GET";
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            string content = reader.ReadToEnd();
            reader.Close();
            return content;
        }

在项目的根目录或者特定的文件夹内，创建一个ashx文件(一般处理程序文件)，如图

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

            string postString = string.Empty;
            if (HttpContext.Current.Request.HttpMethod.ToUpper() == "POST")
            {
                using (Stream stream = HttpContext.Current.Request.InputStream)
                {
                    Byte[] postBytes = new Byte[stream.Length];
                    stream.Read(postBytes, , (Int32)stream.Length);
                    postString = Encoding.UTF8.GetString(postBytes);
                }

                if (!string.IsNullOrEmpty(postString))
                {
                    ResponseXML(postString);//返回给微信用户信息
                }

                ///加载自定义菜单
                StringBuilder sb = new StringBuilder();
                sb.Append("{");
                sb.Append("\"button\":[ ");
                sb.Append("{ ");
                sb.Append("\"name\":\"好好学习\",");
                sb.Append("\"sub_button\":[");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"微学堂\", ");
                sb.Append("\"key\":\"weixuetang\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"大咖说\", ");
                sb.Append("\"key\":\"dakashuo\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"好书推荐\", ");
                sb.Append("\"key\":\"haoshutuijian\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"讲师风采\", ");
                sb.Append("\"key\":\"jiangshifengcai\"");
                sb.Append("}]");
                sb.Append("},");
                sb.Append("{");
                sb.Append("\"name\":\"天天向上\", ");
                sb.Append("\"sub_button\":[");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"看见\", ");
                sb.Append("\"key\":\"kanjian\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"撩我\", ");
                sb.Append("\"key\":\"liaowo\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"view\",");
                sb.Append("\"name\":\"文化UP\", ");
                sb.Append("\"url\":\"https://open.weixin.qq.com/connect/oauth2/authorize?appid="+WeiXinServer.GetAppId().ToString()+"&redirect_uri=" + HttpUtility.UrlEncode(""+WeiXinServer.GetpostUrl().ToString()+"/wenhuaup/wenhua_home.aspx") + "&response_type=code&scope=snsapi_base&state=" + new Random().Next(1000, 200000).ToString() + "#wechat_redirect\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"萝卜快来\", ");
                sb.Append("\"key\":\"luobokuailai\"");
                sb.Append("}]");
                sb.Append("},");
                sb.Append("{");
                sb.Append("\"name\":\"员工自助\",");
                sb.Append("\"sub_button\":[");
                sb.Append("{ ");
                sb.Append("\"type\":\"click\",");
                sb.Append("\"name\":\"我的薪资\", ");
                sb.Append("\"key\":\"mysalary\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"view\",");
                sb.Append("\"name\":\"个人中心\", ");
                sb.Append("\"url\":\"https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + WeiXinServer.GetAppId().ToString() + "&redirect_uri=" + HttpUtility.UrlEncode(""+WeiXinServer.GetpostUrl()+"/UserLogin.aspx") + "&response_type=code&scope=snsapi_base&state=" + new Random().Next(1000, 200000).ToString() + "#wechat_redirect\"");
                sb.Append("},");
                sb.Append("{ ");
                sb.Append("\"type\":\"view\",");
                sb.Append("\"name\":\"在线提问\", ");
                sb.Append("\"url\":\"https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + WeiXinServer.GetAppId().ToString() + "&redirect_uri=" + HttpUtility.UrlEncode(""+WeiXinServer.GetpostUrl()+"/UserCenter/question/MyQuestion.aspx") + "&response_type=code&scope=snsapi_base&state=" + new Random().Next(1000, 200000).ToString() + "#wechat_redirect\"");
                sb.Append("}]");
                sb.Append("}]");
                sb.Append("}");

                //自定义菜单token的获取 是用 下面的两个参数 获取的 不能直接用 公众平台的token
                string to = GetAccessToken();
                //本人不喜欢 后台 json的操作 直接截取就可以了 得到的就是 token 或者 自己 获取 json的token
                to = to.Substring(17, to.Length - 37);
                //加载菜单
                string i = GetPage("https://api.weixin.qq.com/cgi-bin/menu/create?access_token=" + to, sb.ToString());
            }
            else
            {
                Auth(); //微信接入的测试
            }

        }

   /// <summary>
        /// 获取通行证
        /// </summary>
        /// <returns></returns>
        public string GetAccessToken()
        {
            string url_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + WeiXinServer.GetAppId().ToString() + "&secret=" + WeiXinServer.GetAppSecret().ToString();
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url_token);
            myRequest.Method = "GET";
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            string content = reader.ReadToEnd();
            reader.Close();
            return content;
        }/// <summary>
        /// 加载菜单项
        /// </summary>
        /// <param name="p"></param>
        /// <param name="postData"></param>
        /// <returns></returns>
        private string GetPage(string p, string postData)
        {
            Stream outstream = null;
            Stream instream = null;
            StreamReader sr = null;
            HttpWebResponse response = null;
            HttpWebRequest request = null;
            Encoding encoding = Encoding.UTF8;
            byte[] data = encoding.GetBytes(postData);
            // 准备请求...
            try
            {
                // 设置参数
                request = WebRequest.Create(p) as HttpWebRequest;
                CookieContainer cookieContainer = new CookieContainer();
                request.CookieContainer = cookieContainer;
                request.AllowAutoRedirect = true;
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = data.Length;
                outstream = request.GetRequestStream();
                outstream.Write(data, , data.Length);
                outstream.Close();
                //发送请求并获取相应回应数据
                response = request.GetResponse() as HttpWebResponse;
                //直到request.GetResponse()程序才开始向目标网页发送Post请求
                instream = response.GetResponseStream();
                sr = new StreamReader(instream, encoding);
                //返回结果网页（html）代码
                string content = sr.ReadToEnd();
                string err = string.Empty;
                return content;
            }
            catch (Exception ex)
            {
                string err = ex.Message;
                return string.Empty;
            }
        }

 /// <summary>
        /// 获取参数进行认证
        /// </summary>
        private void Auth()
        {
             string token = WeiXinServer.GetToken().ToString();//你申请的时候填写的Token,必须和微信上的保持一致

            string echoString = HttpContext.Current.Request.QueryString["echoStr"];
            string signature = HttpContext.Current.Request.QueryString["signature"];
            string timestamp = HttpContext.Current.Request.QueryString["timestamp"];
            string nonce = HttpContext.Current.Request.QueryString["nonce"];

            if (CheckSignature(token, signature, timestamp, nonce))
            {
                if (!string.IsNullOrEmpty(echoString))
                {
                    HttpContext.Current.Response.Write(echoString);
                    HttpContext.Current.Response.End();
                }
            }

        }
        /// <summary>
        /// 对微信传入参数进行封装到数组，拼接字符串，进行加密操作
        /// </summary>
        /// <param name="token"></param>
        /// <param name="signature"></param>
        /// <param name="timestamp"></param>
        /// <param name="nonce"></param>
        /// <returns></returns>
        private bool CheckSignature(string token, string signature, string timestamp, string nonce)
        {
            string[] ArrTmp = { token, timestamp, nonce };//将参数放进数组

            Array.Sort(ArrTmp);//对数组进行排序
            string tmpStr = string.Join("", ArrTmp);//将数组进行拼接
            ///对拼接后的字符串进行加密操作
            tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
            //转换成小写形式
            tmpStr = tmpStr.ToLower();
            //比对成功返回
            if (tmpStr == signature)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

 /// <summary>
        /// 点击关注平台后，主动发送给用户关注后的消息推送
        /// </summary>
        /// <param name="requestXML"></param>
        private void SendWelComeMsg(RequestXML requestXML)
        {
            String responseContent = String.Empty;

            string newdate = DateTime.Now.Subtract(new DateTime(1970, 1, 1, 8, 0, 0)).TotalSeconds.ToString();

            string PUrlfileName = "";
            string companyName = "";
            string description = "";
            string companywebsite = "";

            //获取使用中的微信配置信息
            WeChatConfigService wcf = new WeChatConfigService();
            WeChatConfigInfo wcfInfo = wcf.GetWeChatConfigInfoByInUse();
            if (wcfInfo != null)
            {
                //初始化微信配置信息
                PUrlfileName = WeiXinServer.GetpostUrl().ToString() + "/img/focus/" + wcfInfo.focus_Image.ToString();
                companyName = wcfInfo.wechat_Name.ToString();
                description = wcfInfo.description.ToString();
                companywebsite = wcfInfo.company_website.ToString();
            }

            responseContent = string.Format(Message_News_Main, requestXML.FromUserName, requestXML.ToUserName, newdate, "1",
                string.Format(Message_News_Item, "欢迎关注" + companyName, description, PUrlfileName, companywebsite));

            HttpContext.Current.Response.ContentType = "text/xml";
            HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
            HttpContext.Current.Response.Write(responseContent);
        }