C#微信公众号开发之消息处理

    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)
        {
            
            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()
        {
            
            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)
        {
            
            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;

        }