微信公众平台-接收消息与发送被动消息

接收消息代码如下（包含回复消息调用）：

    /// <summary>    /// 接收用户消息    /// iftrue    /// 2014-07-08    /// </summary>    public class Receive    {        public delegate Models.Send_Msg delegate_SendMsg(string msgType);        public delegate void delegate_RececiveHandler(Models.Receive_Msg model,ref string msg);        /// <summary>        /// 获取消息对象并且回复消息(需要根据MsgType强制转换成需要的实体类)        /// </summary>        /// <param name="context">上下文</param>        /// <param name="getSendMsg">获取回复消息的方法</param>           /// <param name="receiveHandler">处理接收消息的方法（如：持久化数据库）</param>        /// <param name="msg">错误信息</param>        /// <returns></returns>        public Models.Receive_Msg GetReceiveMsgAndReply(HttpContext context, delegate_SendMsg getSendMsg,delegate_RececiveHandler receiveHandler, ref string msg)        {            if (context == null)                return null;            try            {                string _xml = new HttpHelper().PostInput(context.Request);                if (string.IsNullOrEmpty(_xml))                    return null;                XmlDocument doc = new XmlDocument();                doc.LoadXml(_xml);                XmlElement element = doc.DocumentElement;                Models.Receive_Msg model = GetReceiveModel(element);                //发送被动响应消息                Models.Send_Msg sendModel = getSendMsg(model.MsgType);                if (sendModel != null)                {                    sendModel.ToUserName = model.FromUserName;                    sendModel.FromUserName = model.ToUserName;                    Send send = new Send();                    string strSend = send.Send_Msg<Models.Send_Msg>(sendModel, ref msg);                    if (!string.IsNullOrEmpty(strSend))                    {                        context.Response.Output.Write(strSend);                    }                }                //调用消息处理方法                try                {                    receiveHandler(model, ref msg);                }                catch (Exception ex)                {                    msg = "receiveHandler异常：" + ex.Message;                }                return model;            }            catch (Exception ex)            {                msg = ex.Message;                return null;            }        }        /// <summary>        /// 获取消息对象直接回复空串(需要根据MsgType强制转换成需要的实体类)        /// </summary>        /// <param name="context">上下文</param>        /// <param name="getSendMsg">获取回复消息的方法</param>           /// <param name="receiveHandler">处理接收消息的方法（如：持久化数据库）</param>        /// <param name="msg">错误信息</param>        /// <returns></returns>        public Models.Receive_Msg GetReceiveMsg(HttpContext context, delegate_RececiveHandler receiveHandler, ref string msg)        {            if (context == null)                return null;            try            {                //直接回复空串，避免腾讯重复发送                context.Response.Output.Write("");                string _xml = new HttpHelper().PostInput(context.Request);                if (string.IsNullOrEmpty(_xml))                    return null;                XmlDocument doc = new XmlDocument();                doc.LoadXml(_xml);                XmlElement element = doc.DocumentElement;                Models.Receive_Msg model = GetReceiveModel(element);                //调用消息处理方法                try                {                    receiveHandler(model, ref msg);                }                catch (Exception ex)                {                    msg = "receiveHandler异常：" + ex.Message;                }                return model;            }            catch (Exception ex)            {                msg = ex.Message;                return null;            }        }        /// <summary>        /// 解析ＸＭＬ，转换为实体        /// </summary>        /// <param name="element"></param>        /// <returns></returns>        private Models.Receive_Msg GetReceiveModel(XmlElement element)        {            Models.Receive_Msg model = null;            string msgType = element.SelectSingleNode("MsgType").InnerText;            switch (msgType)            {                case MsgType.text: model = new Models.Receive_Text(); break;                case MsgType.image: model = new Models.Receive_Image(); break;                case MsgType.voice: model = new Models.Receive_Voice(); break;                case MsgType.video: model = new Models.Receive_Video(); break;                case MsgType.location: model = new Models.Receive_Location(); break;                case MsgType.link: model = new Models.Receive_Link(); break;                case MsgType.events: model = GetEventModel(element.SelectSingleNode("Event").InnerText, element.SelectSingleNode("EventKey") == null ? "" : element.SelectSingleNode("EventKey").InnerText); break;            }            try            {                foreach (System.Reflection.PropertyInfo p in model.GetType().GetProperties())                {                    if (p.Name != "Xml")                    {                        p.SetValue(model, element.SelectSingleNode(p.Name).InnerText, null);                    }                    else                    {                        p.SetValue(model, element.OuterXml, null);                    }                }            }            catch (Exception ex)            {                throw ex;            }            return model;        }        /// <summary>        /// 获取事件对象        /// </summary>        /// <param name="evt">事件类型</param>        /// <param name="eventKey">事件KEY值</param>        /// <returns></returns>        private Models.Receive_Msg GetEventModel(string evt, string eventKey)        {            Models.Receive_Msg model = null;            switch (evt)            {                case Event.subscribe:                    if (string.IsNullOrEmpty(eventKey))                    {                        model = new Models.Receive_Event();                    }                    else                    {                        model = new Models.Receive_Event_Scan();                    }                    break;                case Event.unsubscribe:                    model = new Models.Receive_Event();                    break;                case Event.scan:                    model = new Models.Receive_Event_Scan();                    break;                case Event.location:                    model = new Models.Receive_Event_Location();                    break;                case Event.click:                    model = new Models.Receive_Event_Click();                    break;                case Event.view:                    model = new Models.Receive_Event_View();                    break;            }            return model;        }    }

发送消息代码：

     /// <summary>    /// 发送微信    /// 2014-07-15    /// iftrue    /// </summary>    public class Send    {        public string Send_Msg<T>(T t, ref string msg)        {            if (t == null)                return "";            StringBuilder strB = new StringBuilder();            strB.Append("<xml>");            foreach (System.Reflection.PropertyInfo p in t.GetType().GetProperties())            {                strB.Append(string.Format("<{0}>{1}</{0}>", p.Name, p.GetValue(t, null).ToString()));            }            strB.Append("</xml>");            return strB.ToString();        }    }

初始化参数代码：

/// <summary>    /// 初始化参数    /// 2014-07-03    /// iftrue    /// </summary>    public class Init    {        /// <summary>        /// 微信公众平台－开发者中心－服务器配置　中的Token        /// </summary>        public static string Token;        /// <summary>        /// 静态构造        /// </summary>        static Init()        {            string _token = ConfigurationManager.AppSettings["weixin_token"];            if (!string.IsNullOrEmpty(_token))                Token = _token;        }    }    /// <summary>    /// 消息类型    /// </summary>    public class MsgType    {       public const string text="text";       public const string image = "image";       public const string voice = "voice";       public const string video = "video";       public const string location = "location";       public const string link = "link";       public const string events = "event";    }    /// <summary>    /// 事件类型    /// </summary>    public class Event    {        public const string subscribe = "subscribe";        public const string unsubscribe = "unsubscribe";        public const string scan = "SCAN";        public const string location = "LOCATION";        public const string click = "CLICK";        public const string view = "VIEW";    }

代码中还使用到实体类，为方便修改，使用了T4模板。

原码下载：微信公众平台接收（回复）消息C#版