public class UserMessageHandler : MessageHandler<UserMessageContext>{/// <summary>/// 构造函数/// </summary>/// <param name="inputStream">构造函数的inputStream用于接收来自微信服务器的请求流（如果需要在外部处理，这里也可以传入XDocument）</param>/// <param name="postModel">微信公众服务器Post过来的加密参数集合（不包括PostData）</param>public UserMessageHandler(Stream inputStream, PostModel postModel): base(inputStream, postModel){}public override IResponseMessageBase DefaultResponseMessage(IRequestMessageBase requestMessage){/* 所有没有被处理的消息会默认返回这里的结果*/var responseMessage = this.CreateResponseMessage<ResponseMessageText>();//ResponseMessageText也可以是News等其他类型responseMessage.Content = "这条消息来自DefaultResponseMessage。";return responseMessage;}}

using Senparc.Weixin.Context;
using Senparc.Weixin.MP.Entities;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;namespace WeiXinHandler
{public class UserMessageContext: MessageContext<IRequestMessageBase, IResponseMessageBase>{public UserMessageContext(){/** 注意：即使使用其他类实现IMessageContext，* 也务必在这里进行下面的初始化，尤其是设置当前时间，* 这个时间关系到及时从缓存中移除过期的消息，节约内存使用*/base.MessageContextRemoved += UserMessageContext_MessageContextRemoved;}/// <summary>/// 当上下文过期，被移除时触发的时间/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void UserMessageContext_MessageContextRemoved(object sender, Senparc.Weixin.Context.WeixinContextRemovedEventArgs<IRequestMessageBase, IResponseMessageBase> e){/* 注意，这个事件不是实时触发的（当然你也可以专门写一个线程监控）* 为了提高效率，根据WeixinContext中的算法，这里的过期消息会在过期后下一条请求执行之前被清除*/var messageContext = e.MessageContext as CustomMessageContext;if (messageContext == null){return;//如果是正常的调用，messageContext不会为null
            }//TODO:这里根据需要执行消息过期时候的逻辑，下面的代码仅供参考//Log.InfoFormat("{0}的消息上下文已过期",e.OpenId);//api.SendMessage(e.OpenId, "由于长时间未搭理客服，您的客服状态已退出！");
        }}
}

        public override IResponseMessageBase OnTextRequest(RequestMessageText requestMessage){var responseMessage = base.CreateResponseMessage<ResponseMessageText>();responseMessage.Content = "您刚刚发送了文字信息：" + requestMessage.Content;  //requestMessage.Content即用户发过来的文字内容return responseMessage;}

        /// <summary>/// 处理图片请求/// </summary>/// <param name="requestMessage"></param>/// <returns></returns>public override IResponseMessageBase OnImageRequest(RequestMessageImage requestMessage){var responseMessage = CreateResponseMessage<ResponseMessageNews>();responseMessage.Articles.Add(new Article(){Title = "您刚才发送了图片信息",Description = "您发送的图片将会显示在边上",PicUrl = requestMessage.PicUrl,Url = "https://www.cnblogs.com/i3yuan/"});return responseMessage;}

        /// <summary>/// 处理语音请求/// </summary>/// <param name="requestMessage"></param>/// <returns></returns>public override IResponseMessageBase OnVoiceRequest(RequestMessageVoice requestMessage){//获取公众号AccessTokenResult account = Senparc.Weixin.MP.CommonAPIs.CommonApi.GetToken(AppId, AppSecret);var responseMessage = CreateResponseMessage<ResponseMessageMusic>();//上传缩略图var uploadResult = Senparc.Weixin.MP.AdvancedAPIs.MediaApi.UploadTemporaryMedia(account.access_token, UploadMediaFileType.image,Server.GetMapPath("~/Images/Logo.jpg"));//设置音乐信息responseMessage.Music.Title = "天籁之音";responseMessage.Music.Description = "播放您上传的语音";responseMessage.Music.MusicUrl = "http://sdk.weixin.senparc.com/Media/GetVoice?mediaId=" + requestMessage.MediaId;responseMessage.Music.HQMusicUrl = "http://sdk.weixin.senparc.com/Media/GetVoice?mediaId=" + requestMessage.MediaId;responseMessage.Music.ThumbMediaId = uploadResult.media_id;return responseMessage;}   

        /// <summary>/// 处理视频请求/// </summary>/// <param name="requestMessage"></param>/// <returns></returns>public override IResponseMessageBase OnVideoRequest(RequestMessageVideo requestMessage){var responseMessage = CreateResponseMessage<ResponseMessageText>();responseMessage.Content = "您发送了一条视频信息，ID：" + requestMessage.MediaId;return responseMessage;}

        /// <summary>/// 处理位置请求/// </summary>/// <param name="requestMessage"></param>/// <returns></returns>public override IResponseMessageBase OnLocationRequest(RequestMessageLocation requestMessage){var locationService = new LocationService();var responseMessage = locationService.GetResponseMessage(requestMessage as RequestMessageLocation);return responseMessage;}

        /// <summary>/// 处理链接消息请求/// </summary>/// <param name="requestMessage"></param>/// <returns></returns>public override IResponseMessageBase OnLinkRequest(RequestMessageLink requestMessage){var responseMessage = ResponseMessageBase.CreateFromRequestMessage<ResponseMessageText>(requestMessage);responseMessage.Content = string.Format(@"您发送了一条连接信息：Title：{0}Description:{1}Url:{2}", requestMessage.Title, requestMessage.Description, requestMessage.Url);return responseMessage;}

        [HttpPost][ActionName("Index")]public Task<ActionResult> Post(PostModel postModel){return Task.Factory.StartNew<ActionResult>(() =>{if (!CheckSignature.Check(postModel.Signature, postModel.Timestamp, postModel.Nonce, Token)){return new WeixinResult("参数错误！");}var messageHandler = new UserMessageHandler(Request.InputStream);messageHandler.Execute(); //执行微信处理过程return new FixWeixinBugWeixinResult(messageHandler);}).ContinueWith<ActionResult>(task => task.Result);}}

        public override IResponseMessageBase OnTextRequest(RequestMessageText requestMessage){var responseMessage = CreateResponseMessage<ResponseMessageNews>();responseMessage.Articles.Add(new Article(){Title = "灌篮高手",Description = "灌篮高手",PicUrl = "http://images.cnblogs.com/cnblogs_com/i3yuan/1462639/o_timg%20(1).jpg",Url = "https://www.cnblogs.com/i3yuan/"});return responseMessage;}