C#.net 微信公众账号接口开发

微信越来越火，微信公众平台成为开发成新宠，本文用C#.net开发微信公众信号接口。
微信接口地址代码:
weixin _wx = new weixin（）;string postStr = "";if （Request.HttpMethod.ToLower（） == "post"）{Stream s = System.Web.HttpContext.Current.Request.InputStream;byte[] b = new byte[s.Length];s.Read（b, 0, （int）s.Length）;postStr = Encoding.UTF8.GetString（b）;if （！string.IsNullOrEmpty（postStr）） //请求处理{_wx.Handle（postStr）; }}else{_wx.Auth（）;}微信处理类：public class weixin{private string Token = "weixin_token"; //换成自己的token public void Auth（）{string echoStr = System.Web.HttpContext.Current.Request.QueryString["echoStr"];if （CheckSignature（））{if （！string.IsNullOrEmpty（echoStr））{System.Web.HttpContext.Current.Response.Write（echoStr）;System.Web.HttpContext.Current.Response.End（）;}}}public void Handle（string postStr）{//封装请求类XmlDocument doc = new XmlDocument（）;doc.LoadXml（postStr）;XmlElement rootElement = doc.DocumentElement;XmlNode MsgType = rootElement.SelectSingleNode（"MsgType"）;RequestXML requestXML = new RequestXML（）;requestXML.ToUserName = rootElement.SelectSingleNode（"ToUserName"）.InnerText;requestXML.FromUserName = rootElement.SelectSingleNode（"FromUserName"）.InnerText;requestXML.CreateTime = rootElement.SelectSingleNode（"CreateTime"）.InnerText;requestXML.MsgType = MsgType.InnerText;if （requestXML.MsgType == "text"）{requestXML.Content = rootElement.SelectSingleNode（"Content"）.InnerText;}else if （requestXML.MsgType == "location"）{requestXML.Location_X = rootElement.SelectSingleNode（"Location_X"）.InnerText;requestXML.Location_Y = rootElement.SelectSingleNode（"Location_Y"）.InnerText;requestXML.Scale = rootElement.SelectSingleNode（"Scale"）.InnerText;requestXML.Label = rootElement.SelectSingleNode（"Label"）.InnerText;}else if （requestXML.MsgType == "image"）{requestXML.PicUrl = rootElement.SelectSingleNode（"PicUrl"）.InnerText;}//回复消息ResponseMsg（requestXML）;}/// <summary>/// 验证微信签名/// </summary>/// * 将token、timestamp、nonce三个参数进行字典序排序/// * 将三个参数字符串拼接成一个字符串进行sha1加密/// * 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信。/// <returns></returns>private bool CheckSignature（）{string signature = System.Web.HttpContext.Current.Request.QueryString["signature"];string timestamp = System.Web.HttpContext.Current.Request.QueryString["timestamp"];string nonce = System.Web.HttpContext.Current.Request.QueryString["nonce"];string[] ArrTmp = { Token, timestamp, nonce };Array.Sort（ArrTmp）; //字典排序string tmpStr = string.Join（"", ArrTmp）;tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile（tmpStr, "SHA1"）;tmpStr = tmpStr.ToLower（）;if （tmpStr == signature）{return true;}else{return false;}}/// <summary>/// 回复消息（微信信息返回）/// </summary>/// <param name="weixinXML"></param>private void ResponseMsg（RequestXML requestXML）{try{string resxml = "";mijiya mi = new mijiya（requestXML.Content,requestXML.FromUserName）;if （requestXML.MsgType == "text"）{//在这里执行一系列操作，从而实现自动回复内容. string _reMsg = mi.GetReMsg（）;if （mi.msgType == 1）{resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[news]]></MsgType><Content><！[CDATA[]]></Content><ArticleCount>2</ArticleCount><Articles>";resxml += mi.GetRePic（requestXML.FromUserName）;resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";}else{resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[text]]></MsgType><Content><！[CDATA[" + _reMsg + "]]></Content><FuncFlag>1</FuncFlag></xml>";}}else if （requestXML.MsgType == "location"）{string city = GetMapInfo（requestXML.Location_X, requestXML.Location_Y）;if （city == "0"）{resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[text]]></MsgType><Content><！[CDATA[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault（） + "]]></Content><FuncFlag>1</FuncFlag></xml>";}else{resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[text]]></MsgType><Content><！[CDATA[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault（） + "]]></Content><FuncFlag>1</FuncFlag></xml>";}}else if （requestXML.MsgType == "image"）{resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[text]]></MsgType><Content><！[CDATA[亲,我没有看懂你的意思。您可以:" + mi.GetDefault（） + "]]></Content><FuncFlag>1</FuncFlag></xml>";//返回10以内条//int size = 10;//resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[news]]></MsgType><Content><！[CDATA[]]></Content><ArticleCount>" + size + "</ArticleCount><Articles>";//List<string> list = new List<string>（）;////假如有20条查询的返回结果//for （int i = 0; i < 20; i++）//{//list.Add（"1"）;//}//string[] piclist = new string[] { "/Abstract_Pencil_Scribble_Background_Vector_main.jpg", "/balloon_tree.jpg", "/bloom.jpg", "/colorful_flowers.jpg", "/colorful_summer_flower.jpg", "/fall.jpg", "/fall_tree.jpg", "/growing_flowers.jpg", "/shoes_illustration.jpg", "/splashed_tree.jpg" };//for （int i = 0; i < size && i < list.Count; i++）//{//resxml += "<item><Title><！[CDATA[沈阳-黑龙江]]></Title><Description><！[CDATA[元旦特价：￥300 市场价：￥400]]></Description><PicUrl><！[CDATA[" + "http://www.hougelou.com" + piclist[i] + "]]></PicUrl><Url><！[CDATA[http://www.hougelou.com]]></Url></item>";//}//resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";}else if （wx_tmsg.GetMsgCount（requestXML.FromUserName） == 0）{resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[text]]></MsgType><Content><！[CDATA[" + mi.GetFirst（） + "]]></Content><FuncFlag>1</FuncFlag></xml>";}else{resxml = "<xml><ToUserName><！[CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><！[CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt（DateTime.Now） + "</CreateTime><MsgType><！[CDATA[text]]></MsgType><Content><！[CDATA[亲,我没有看懂你的意思。您可以:" + mi.GetDefault（） + "]]></Content><FuncFlag>1</FuncFlag></xml>";}//WriteTxt（resxml）;System.Web.HttpContext.Current.Response.Write（resxml）;WriteToDB（requestXML, resxml,mi.pid）;}catch （Exception ex）{//WriteTxt（"异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString（））;wx_logs.MyInsert（"异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString（））;}} /// <summary>/// unix时间转换为datetime/// </summary>/// <param name="timeStamp"></param>/// <returns></returns>private DateTime UnixTimeToTime（string timeStamp）{DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime（new DateTime（1970, 1, 1））;long lTime = long.Parse（timeStamp + "0000000"）;TimeSpan toNow = new TimeSpan（lTime）;return dtStart.Add（toNow）;}/// <summary>/// datetime转换为unixtime/// </summary>/// <param name="time"></param>/// <returns></returns>private int ConvertDateTimeInt（System.DateTime time）{System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime（new System.DateTime（1970, 1, 1））;return （int）（time - startTime）.TotalSeconds;}/// <summary>/// 调用百度地图，返回坐标信息/// </summary>/// <param name="y">经度</param>/// <param name="x">纬度</param>/// <returns></returns>public string GetMapInfo（string x, string y）{try{string res = string.Empty;string parame = string.Empty;string url = "http://maps.googleapis.com/maps/api/geocode/xml";parame = "latlng=" + x + "," + y + "&language=zh-CN&sensor=false";//此key为个人申请res = webRequestPost（url, parame）;XmlDocument doc = new XmlDocument（）;doc.LoadXml（res）;XmlElement rootElement = doc.DocumentElement;string Status = rootElement.SelectSingleNode（"status"）.InnerText;if （Status == "OK"）{//仅获取城市XmlNodeList xmlResults = rootElement.SelectSingleNode（"/GeocodeResponse"）.ChildNodes;for （int i = 0; i < xmlResults.Count; i++）{XmlNode childNode = xmlResults[i];if （childNode.Name == "status"）{continue;}string city = "0";for （int w = 0; w < childNode.ChildNodes.Count; w++）{for （int q = 0; q < childNode.ChildNodes[w].ChildNodes.Count; q++）{XmlNode childeTwo = childNode.ChildNodes[w].ChildNodes[q];if （childeTwo.Name == "long_name"）{city = childeTwo.InnerText;}else if （childeTwo.InnerText == "locality"）{return city;}}}return city;}}}catch （Exception ex）{//WriteTxt（"map异常:" + ex.Message.ToString（） + "Struck:" + ex.StackTrace.ToString（））;return "0";}return "0";}/// <summary>/// Post 提交调用抓取/// </summary>/// <param name="url">提交地址</param>/// <param name="param">参数</param>/// <returns>string</returns>public string webRequestPost（string url, string param）{byte[] bs = System.Text.Encoding.UTF8.GetBytes（param）;HttpWebRequest req = （HttpWebRequest）HttpWebRequest.Create（url + "?" + param）;req.Method = "Post";req.Timeout = 120 * 1000;req.ContentType = "application/x-www-form-urlencoded;";req.ContentLength = bs.Length;using （Stream reqStream = req.GetRequestStream（））{reqStream.Write（bs, 0, bs.Length）;reqStream.Flush（）;}using （WebResponse wr = req.GetResponse（））{//在这里对接收到的页面内容进行处理 Stream strm = wr.GetResponseStream（）;StreamReader sr = new StreamReader（strm, System.Text.Encoding.UTF8）;string line;System.Text.StringBuilder sb = new System.Text.StringBuilder（）;while （（line = sr.ReadLine（）） ！= null）{sb.Append（line + System.Environment.NewLine）;}sr.Close（）;strm.Close（）;return sb.ToString（）;}}private void WriteToDB（RequestXML requestXML,string _xml,int _pid）{wx_tmsg wx = new wx_tmsg（）;wx.AddNew（）;wx.FromUserName = requestXML.FromUserName;wx.ToUserName = requestXML.ToUserName;wx.MsgType = requestXML.MsgType;wx.Msg = requestXML.Content;wx.Creatime = requestXML.CreateTime;wx.Location_X = requestXML.Location_X;wx.Location_Y = requestXML.Location_Y;wx.Label = requestXML.Label;wx.Scale = requestXML.Scale;wx.PicUrl = requestXML.PicUrl;wx.reply = _xml;wx.pid = _pid;try{wx.Update（）;}catch （Exception ex）{wx_logs.MyInsert（ex.Message）;//ex.message;}}}//微信请求类public class RequestXML{private string toUserName="";/// <summary>/// 消息接收方微信号，一般为公众平台账号微信号/// </summary>public string ToUserName{get { return toUserName; }set { toUserName = value; }}private string fromUserName = "";/// <summary>/// 消息发送方微信号/// </summary>public string FromUserName{get { return fromUserName; }set { fromUserName = value; }}private string createTime = "";/// <summary>/// 创建时间/// </summary>public string CreateTime{get { return createTime; }set { createTime = value; }}private string msgType = "";/// <summary>/// 信息类型 地理位置:location,文本消息:text,消息类型:image/// </summary>public string MsgType{get { return msgType; }set { msgType = value; }}private string content = "";/// <summary>/// 信息内容/// </summary>public string Content{get { return content; }set { content = value; }}private string location_X = "";/// <summary>/// 地理位置纬度/// </summary>public string Location_X{get { return location_X; }set { location_X = value; }}private string location_Y = "";/// <summary>/// 地理位置经度/// </summary>public string Location_Y{get { return location_Y; }set { location_Y = value; }}private string scale = "";/// <summary>/// 地图缩放大小/// </summary>public string Scale{get { return scale; }set { scale = value; }}private string label = "";/// <summary>/// 地理位置信息/// </summary>public string Label{get { return label; }set { label = value; }}private string picUrl = "";/// <summary>/// 图片链接，开发者可以用HTTP GET获取/// </summary>public string PicUrl{get { return picUrl; }set { picUrl = value; }}}
说明：其中用到的mijiya类，主要是调用数据库进行关键词匹配自动回复内容，可以根据自己的业务情况编写。