C#微信开发---用户关注微信号后公众号发送欢迎关注

用户关注微信或者取消关注微信的时候，微信服务器会发送一个 post请求到微信配置中的URL地址中。可以提取其中 的数据判断是关注还是取消

推送XML数据包示例：

<xml><ToUserName>< ![CDATA[toUser] ]></ToUserName><FromUserName>< ![CDATA[FromUser] ]></FromUserName><CreateTime>123456789</CreateTime><MsgType>< ![CDATA[event] ]></MsgType><Event>< ![CDATA[subscribe] ]></Event></xml>

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//1:总方法

private void subscribe(){//1:得到发送过来的数据string inMessage = GetSendInMessage(Request);//2:获取xml中的数据WX_In_MessageParent wX_In = new WX_In_MessageParent(inMessage);//3:判断是否是订阅或取消订阅事件if (WX_in_MessageManager.getTagNameContent(inMessage, WX_In_Filed.Event.ToString()) != ""){//2:执行发送信息的方法Event(inMessage, wX_In);}}

//2: 引用方法

private string GetSendInMessage(HttpRequestBase requestBase){using (Stream stream = requestBase.InputStream){//创建一个字节数字，用来保存读取的字符Byte[] postBytes = new Byte[stream.Length];//把传递过来的内容保存(读取)到postBytes字符数组中stream.Read(postBytes, 0, (Int32)stream.Length);//得到传递过来的内容。string postString = Encoding.UTF8.GetString(postBytes);return postString;}}

//3:类 WX_In_MessageParent

public class WX_In_MessageParent{private string toUserName;private string fromUserName;private string createTime;private string msgType;private string msgId;public string ToUserName{get{return toUserName;}set{toUserName = value;}}public string FromUserName{get{return fromUserName;}set{fromUserName = value;}}public string CreateTime{get{return createTime;}set{createTime = value;}}public string MsgType{get{return msgType;}set{msgType = value;}}public string MsgId{get{return msgId;}set{msgId = value;}}/*通过构造函数来获取服务器发送过来的信息*/public WX_In_MessageParent(string requestStr){ToUserName = WX_in_MessageManager.getTagNameContent(requestStr, WX_In_Filed.ToUserName.ToString());FromUserName = WX_in_MessageManager.getTagNameContent(requestStr, WX_In_Filed.FromUserName.ToString());CreateTime = WX_in_MessageManager.getTagNameContent(requestStr, WX_In_Filed.CreateTime.ToString());MsgType = WX_in_MessageManager.getTagNameContent(requestStr, WX_In_Filed.MsgType.ToString());MsgId = WX_in_MessageManager.getTagNameContent(requestStr, WX_In_Filed.MsgId.ToString());}}

//4:事件

private void Event(string inMessage, WX_In_MessageParent WX_In){string eventName = WX_in_MessageManager.getTagNameContent(inMessage, WX_In_Filed.Event.ToString());switch (eventName){case "subscribe"://订阅Response.Write(WX_MessageCode.WX_Subscribe(WX_In));break;case "unsubscribe"://取消订阅WX_MessageCode.WX_UnSubscribe(WX_In);break;default:break;}}

//5:推送方法

public static string WX_Subscribe(WX_In_MessageParent wxobj){WX_Out_MessageText wx_out = new WX_Out_MessageText(wxobj, "欢迎关注****");return wx_out.GetReturnStr();}

public override string GetReturnStr(){//Content就是刚才传进来的数据，这个地方是调用的字段，类WX_In_MessageParent中的字段StringBuilder strbuff = new StringBuilder();strbuff.Append("<xml>");strbuff.Append("<ToUserName><![CDATA[" + ToUserName + "]]></ToUserName>");strbuff.Append("<FromUserName><![CDATA[" + FromUserName + "]]></FromUserName>");strbuff.Append("<CreateTime>" + CreateTime + "</CreateTime>");strbuff.Append("<MsgType><![CDATA[" + MsgType + "]]></MsgType>");strbuff.Append("<Content><![CDATA[" + Content + "]]></Content>");strbuff.Append("</xml>");return strbuff.ToString();}

写得比较散，不好全部拿出来，只取了核心的方法。