.net实现微信公众账号接口开发实例代码

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(); 

}

/// <summary> 

/// 微信公众平台操作类 

/// </summary> 

public class weixin 

{ 

private string Token = "my_weixin_token"; //换成自己的token 

public void Auth() 

{ 

string echoStr = System.Web.HttpContext.Current.Request.QueryString["echoStr"]; 

if (CheckSignature()) //校验签名是否正确 

{ 

if (!string.IsNullOrEmpty(echoStr)) 

{ 

System.Web.HttpContext.Current.Response.Write(echoStr); //返回原值表示校验成功 

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; 

//MsgType 

XmlNode MsgType = rootElement.SelectSingleNode("MsgType"); 

//接收的值--->接收消息类(也称为消息推送) 

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; 

//根据不同的类型进行不同的处理 

switch (requestXML.MsgType) 

{ 

case "text": //文本消息 

requestXML.Content = rootElement.SelectSingleNode("Content").InnerText; 

break; 

case "image": //图片 

requestXML.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText; 

break; 

case "location": //位置 

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; 

break; 

case "link": //链接 

break; 

case "event": //事件推送 支持V4.5+ 

break; 

} 

//消息回复 

ResponseMsg(requestXML); 

} 

 

/// <summary> 

/// 验证微信签名 

/// * 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。 

/// </summary> 

/// <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"]; 

//加密/校验流程： 

//1. 将token、timestamp、nonce三个参数进行字典序排序 

string[] ArrTmp = { Token, timestamp, nonce };  

Array.Sort(ArrTmp);//字典排序 

//2.将三个参数字符串拼接成一个字符串进行sha1加密 

string tmpStr = string.Join("", ArrTmp); 

tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1"); 

tmpStr = tmpStr.ToLower(); 

//3.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。 

if (tmpStr == signature) 

{ 

return true; 

} 

else

{ 

return false; 

} 

} 

/// <summary> 

/// 消息回复(微信信息返回) 

/// </summary> 

/// <param name="requestXML">The request XML.</param> 

private void ResponseMsg(RequestXML requestXML) 

{ 

try

{ 

string resxml = ""; 

//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。 

//1.通常有，没有匹配任何指令时，返回帮助信息 

AutoResponse mi = new AutoResponse(requestXML.Content, requestXML.FromUserName); 

switch (requestXML.MsgType) 

{ 

case "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>"; 

} 

break; 

case "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>"; 

} 

break; 

case "image": 

//图文混合的消息 具体格式请见官方API“回复图文消息”  

break; 

} 

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(); 

} 

} 

/// <summary> 

/// 将本次交互信息保存至数据库中 

/// </summary> 

/// <param name="requestXML"></param> 

/// <param name="_xml"></param> 

/// <param name="_pid"></param> 

private void WriteToDB(RequestXML requestXML, string _xml, int _pid) 

{ 

WeiXinMsg wx = new WeiXinMsg(); 

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.Add(); 

} 

catch (Exception ex) 

{ 

//wx_logs.MyInsert(ex.Message); 

//ex.message; 

} 

} 

}

#region 微信请求类 RequestXML 

/// <summary> 

/// 微信请求类 

/// </summary> 

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; } 

} 

} 

#endregion