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微信公共服务平台开发(.Net 的实现)10-------地理

来源:自学PHP网    时间:2015-04-14 12:58 作者: 阅读:

[导读] 微信公共平台中涉及到地理位置的有两种情况: 第一、我发送一个自选的地理位置给微信,然后微信可以自动反馈响应的信息。 第二、让微信获取我们GPS定位地址位置,反馈响应的信息...

微信公共平台中涉及到地理位置的有两种情况:
       第一、我发送一个自选的地理位置给微信,然后微信可以自动反馈响应的信息。
       第二、让微信获取我们GPS定位地址位置,反馈响应的信息。
       首先我们先来看第一种,在微信中除了可以发文本,图片,语音等还有一个信息就是地理位置,按照微信接受地理信息的XML信息,我们需要改造一下之前的wxmessage类加上几个属性:

class wxmessage    
   {    
       public string FromUserName { get; set; }    
       public string ToUserName { get; set; }    
        public string MsgType { get; set; }    
        public string EventName { get; set; }    
        public string Content { get; set; }  
        public string Recognition { get; set; }  
        public string MediaId { get; set; }  
        public string EventKey { get; set; }   
        public string Location_X { get; set; }  
        public string Location_Y { get; set; }  
        public string Scale { get; set; }  
        public string Label { get; set; }  
  
    }  
class wxmessage    
   {    
       public string FromUserName { get; set; }    
       public string ToUserName { get; set; }    
        public string MsgType { get; set; }    
        public string EventName { get; set; }    
        public string Content { get; set; }  
        public string Recognition { get; set; }  
        public string MediaId { get; set; }  
        public string EventKey { get; set; }   
        public string Location_X { get; set; }  
        public string Location_Y { get; set; }  
        public string Scale { get; set; }  
        public string Label { get; set; }  
  
    }  

 

       其中Location_X代表纬度,Location_Y代表经度,Scale代表缩放比例,Label代表位置的描述
       和接受文本,语音消息一下样,地理信息的MsgType为“location”,修改一下之前的GetWxMessage()函数和OnLoad里面的消息处理:
 private wxmessage GetWxMessage()  
     {  
         wxmessage wx = new wxmessage();  
         StreamReader str = new StreamReader(Request.InputStream, System.Text.Encoding.UTF8);  
         XmlDocument xml = new XmlDocument();  
         xml.Load(str);  
         wx.ToUserName = xml.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;  
         wx.FromUserName = xml.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;  
         wx.MsgType = xml.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;  
         if (wx.MsgType.Trim() == "text")  
         {  
             wx.Content = xml.SelectSingleNode("xml").SelectSingleNode("Content").InnerText;  
         }  
         if (wx.MsgType.Trim() == "location")  
         {  
             wx.Location_X = xml.SelectSingleNode("xml").SelectSingleNode("Location_X").InnerText;  
             wx.Location_Y = xml.SelectSingleNode("xml").SelectSingleNode("Location_Y").InnerText;  
             wx.Scale = xml.SelectSingleNode("xml").SelectSingleNode("Scale").InnerText;  
             wx.Label = xml.SelectSingleNode("xml").SelectSingleNode("Label").InnerText;  
  
         }  
         if (wx.MsgType.Trim() == "event")  
         {  
             wx.EventName = xml.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;  
             wx.EventKey = xml.SelectSingleNode("xml").SelectSingleNode("EventKey").InnerText;  
         }  
         if (wx.MsgType.Trim() == "voice")  
         {  
             wx.Recognition = xml.SelectSingleNode("xml").SelectSingleNode("Recognition").InnerText;  
         }  
           
         return wx;  
     }  
 private wxmessage GetWxMessage()  
     {  
         wxmessage wx = new wxmessage();  
         StreamReader str = new StreamReader(Request.InputStream, System.Text.Encoding.UTF8);  
         XmlDocument xml = new XmlDocument();  
         xml.Load(str);  
         wx.ToUserName = xml.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;  
         wx.FromUserName = xml.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;  
         wx.MsgType = xml.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;  
         if (wx.MsgType.Trim() == "text")  
         {  
             wx.Content = xml.SelectSingleNode("xml").SelectSingleNode("Content").InnerText;  
         }  
         if (wx.MsgType.Trim() == "location")  
         {  
             wx.Location_X = xml.SelectSingleNode("xml").SelectSingleNode("Location_X").InnerText;  
             wx.Location_Y = xml.SelectSingleNode("xml").SelectSingleNode("Location_Y").InnerText;  
             wx.Scale = xml.SelectSingleNode("xml").SelectSingleNode("Scale").InnerText;  
             wx.Label = xml.SelectSingleNode("xml").SelectSingleNode("Label").InnerText;  
  
         }  
         if (wx.MsgType.Trim() == "event")  
         {  
             wx.EventName = xml.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;  
             wx.EventKey = xml.SelectSingleNode("xml").SelectSingleNode("EventKey").InnerText;  
         }  
         if (wx.MsgType.Trim() == "voice")  
         {  
             wx.Recognition = xml.SelectSingleNode("xml").SelectSingleNode("Recognition").InnerText;  
         }  
           
         return wx;  
     }  
 protected void Page_Load(object sender, EventArgs e)  
  {  
      wxmessage wx = GetWxMessage();  
      string res = "";  
  
  
      if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "subscribe")  
      {  
          string content = "";  
          if (!wx.EventKey.Contains("qrscene_"))  
          {  
              content = "/:rose欢迎北京永杰友信科技有限公司/:rose\n直接回复“你好”";  
              res = sendTextMessage(wx, content);  
          }  
          else  
          {  
              content = "二维码参数:\n" + wx.EventKey.Replace("qrscene_", "");  
              res = sendTextMessage(wx, content);  
          }  
      }  
  
      else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.ToLower() == "scan")  
      {  
          string str = "二维码参数:\n" + wx.EventKey;  
          res = sendTextMessage(wx, str);  
      }  
      else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "CLICK")  
      {  
          if(wx.EventKey=="HELLO")  
              res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
      }  
      else  
      {  
          WriteLog(wx.MsgType);  
          if (wx.MsgType == "text" && wx.Content == "你好")  
          {  
              res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
          }  
          else if (wx.MsgType == "voice")  
          {  
              res = sendTextMessage(wx, wx.Recognition);  
          }  
          else if (wx.MsgType == "location")  
          {  
              res = sendTextMessage(wx, "您发送的位置是:" + wx.Label + ";纬度是:" + wx.Location_X + ";经度是:" + wx.Location_Y + ";缩放比例为:" + wx.Scale);  
          }  
          else  
          {  
              res = sendTextMessage(wx, "你好,未能识别消息!");  
          }  
      }  
  
      Response.Write(res);  
  }  
 protected void Page_Load(object sender, EventArgs e)  
  {  
      wxmessage wx = GetWxMessage();  
      string res = "";  
  
  
      if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "subscribe")  
      {  
          string content = "";  
          if (!wx.EventKey.Contains("qrscene_"))  
          {  
              content = "/:rose欢迎北京永杰友信科技有限公司/:rose\n直接回复“你好”";  
              res = sendTextMessage(wx, content);  
          }  
          else  
          {  
              content = "二维码参数:\n" + wx.EventKey.Replace("qrscene_", "");  
              res = sendTextMessage(wx, content);  
          }  
      }  
  
      else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.ToLower() == "scan")  
      {  
          string str = "二维码参数:\n" + wx.EventKey;  
          res = sendTextMessage(wx, str);  
      }  
      else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "CLICK")  
      {  
          if(wx.EventKey=="HELLO")  
              res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
      }  
      else  
      {  
          WriteLog(wx.MsgType);  
          if (wx.MsgType == "text" && wx.Content == "你好")  
          {  
              res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
          }  
          else if (wx.MsgType == "voice")  
          {  
              res = sendTextMessage(wx, wx.Recognition);  
          }  
          else if (wx.MsgType == "location")  
          {  
              res = sendTextMessage(wx, "您发送的位置是:" + wx.Label + ";纬度是:" + wx.Location_X + ";经度是:" + wx.Location_Y + ";缩放比例为:" + wx.Scale);  
          }  
          else  
          {  
              res = sendTextMessage(wx, "你好,未能识别消息!");  
          }  
      }  
  
      Response.Write(res);  
  }  


 

       这样当我们发送一个地理位置信息的时候就可以反馈响应的信息了。值得一提的是:这里的地理信息位置无需授权,因为自己发送的地理信息位置不一定是自己的真实位置,我们可以在输入界面进行任意选择,不会涉及隐私。
       当然如果我们像制作类似于“我附近”的功能的时候,就必须有两个条件,在微信公共号中开启获取用户地理信息的功能。第二,用户自己在关注微信的时候允许微信公共号获取我的位置。这就需要用到我们在文章开始的时候给大家介绍的第二种情况了。按照微信的解释,当一个会话开始的时候(也就是说进入对话界面的时候),首先获取一下,然后每个五秒自动获取一次。也就是就是说获得用户位置信息的时候触发的不是“你一言我一语的对话”,而是一个特殊的事件,每格五秒出发一次。这里被定义为MsgType为“event”,而为了区别于其他的“event”,他的EventName(其实官方叫做event)为“LOCATION”(大写哦)。
       下面我依然需要按照微信的格式修改我们的wxmessage类:
 class wxmessage    
  {    
      public string FromUserName { get; set; }    
      public string ToUserName { get; set; }    
       public string MsgType { get; set; }    
       public string EventName { get; set; }    
       public string Content { get; set; }  
       public string Recognition { get; set; }  
       public string MediaId { get; set; }  
       public string EventKey { get; set; }   
       public string Location_X { get; set; }  
       public string Location_Y { get; set; }  
       public string Scale { get; set; }  
       public string Label { get; set; }  
       public string Latitude { get; set; }  
       public string Longitude { get; set; }  
       public string Precision { get; set; }  
  
   }  
 class wxmessage    
  {    
      public string FromUserName { get; set; }    
      public string ToUserName { get; set; }    
       public string MsgType { get; set; }    
       public string EventName { get; set; }    
       public string Content { get; set; }  
       public string Recognition { get; set; }  
       public string MediaId { get; set; }  
       public string EventKey { get; set; }   
       public string Location_X { get; set; }  
       public string Location_Y { get; set; }  
       public string Scale { get; set; }  
       public string Label { get; set; }  
       public string Latitude { get; set; }  
       public string Longitude { get; set; }  
       public string Precision { get; set; }  
  
   }  

 

       改造一下GetWxMessage()函数和OnLoad函数:
 private wxmessage GetWxMessage()  
     {  
         wxmessage wx = new wxmessage();  
         StreamReader str = new StreamReader(Request.InputStream, System.Text.Encoding.UTF8);  
         XmlDocument xml = new XmlDocument();  
         xml.Load(str);  
         wx.ToUserName = xml.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;  
         wx.FromUserName = xml.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;  
         wx.MsgType = xml.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;  
         WriteLog("MsgType:"+wx.MsgType);  
         if (wx.MsgType.Trim() == "event")  
         {  
             wx.EventName = xml.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;  
             WriteLog(wx.EventName);  
             if (wx.EventName.ToUpper() == "LOCATION")  
             {  
                 wx.Latitude = xml.SelectSingleNode("xml").SelectSingleNode("Latitude").InnerText;  
                 wx.Longitude = xml.SelectSingleNode("xml").SelectSingleNode("Longitude").InnerText;  
                 wx.Precision = xml.SelectSingleNode("xml").SelectSingleNode("Precision").InnerText;  
             }  
             else  
             {  
                 wx.EventKey = xml.SelectSingleNode("xml").SelectSingleNode("EventKey").InnerText;  
             }  
         }  
         if (wx.MsgType.Trim() == "text")  
         {  
             wx.Content = xml.SelectSingleNode("xml").SelectSingleNode("Content").InnerText;  
         }  
         if (wx.MsgType.Trim() == "location")  
         {  
             wx.Location_X = xml.SelectSingleNode("xml").SelectSingleNode("Location_X").InnerText;  
             wx.Location_Y = xml.SelectSingleNode("xml").SelectSingleNode("Location_Y").InnerText;  
             wx.Scale = xml.SelectSingleNode("xml").SelectSingleNode("Scale").InnerText;  
             wx.Label = xml.SelectSingleNode("xml").SelectSingleNode("Label").InnerText;  
  
         }  
           
         if (wx.MsgType.Trim() == "voice")  
         {  
             wx.Recognition = xml.SelectSingleNode("xml").SelectSingleNode("Recognition").InnerText;  
         }  
           
         return wx;  
     }  
 private wxmessage GetWxMessage()  
     {  
         wxmessage wx = new wxmessage();  
         StreamReader str = new StreamReader(Request.InputStream, System.Text.Encoding.UTF8);  
         XmlDocument xml = new XmlDocument();  
         xml.Load(str);  
         wx.ToUserName = xml.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;  
         wx.FromUserName = xml.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;  
         wx.MsgType = xml.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;  
         WriteLog("MsgType:"+wx.MsgType);  
         if (wx.MsgType.Trim() == "event")  
         {  
             wx.EventName = xml.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;  
             WriteLog(wx.EventName);  
             if (wx.EventName.ToUpper() == "LOCATION")  
             {  
                 wx.Latitude = xml.SelectSingleNode("xml").SelectSingleNode("Latitude").InnerText;  
                 wx.Longitude = xml.SelectSingleNode("xml").SelectSingleNode("Longitude").InnerText;  
                 wx.Precision = xml.SelectSingleNode("xml").SelectSingleNode("Precision").InnerText;  
             }  
             else  
             {  
                 wx.EventKey = xml.SelectSingleNode("xml").SelectSingleNode("EventKey").InnerText;  
             }  
         }  
         if (wx.MsgType.Trim() == "text")  
         {  
             wx.Content = xml.SelectSingleNode("xml").SelectSingleNode("Content").InnerText;  
         }  
         if (wx.MsgType.Trim() == "location")  
         {  
             wx.Location_X = xml.SelectSingleNode("xml").SelectSingleNode("Location_X").InnerText;  
             wx.Location_Y = xml.SelectSingleNode("xml").SelectSingleNode("Location_Y").InnerText;  
             wx.Scale = xml.SelectSingleNode("xml").SelectSingleNode("Scale").InnerText;  
             wx.Label = xml.SelectSingleNode("xml").SelectSingleNode("Label").InnerText;  
  
         }  
           
         if (wx.MsgType.Trim() == "voice")  
         {  
             wx.Recognition = xml.SelectSingleNode("xml").SelectSingleNode("Recognition").InnerText;  
         }  
           
         return wx;  
     }  


 

       当MsgType为event的时候我们之前用到的是菜单的事件,现在我们需要加入其EventName为"LOCATION"的代码段,因为现在还没有涉及其他的event我后面就用else好了,后面我会把代码写的规范些。在这里分别给新增的三个属性赋值,然后修改一下Onload函数
 protected void Page_Load(object sender, EventArgs e)  
    {  
  
        wxmessage wx = GetWxMessage();  
        string res = "";  
  
  
        if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "subscribe")  
        {  
            string content = "";  
            if (!wx.EventKey.Contains("qrscene_"))  
            {  
                content = "/:rose欢迎北京永杰友信科技有限公司/:rose\n直接回复“你好”";  
                res = sendTextMessage(wx, content);  
            }  
            else  
            {  
                content = "二维码参数:\n" + wx.EventKey.Replace("qrscene_", "");  
                res = sendTextMessage(wx, content);  
            }  
        }  
  
        else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.ToLower() == "scan")  
        {  
            string str = "二维码参数:\n" + wx.EventKey;  
            res = sendTextMessage(wx, str);  
        }  
        else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "CLICK")  
        {  
            if(wx.EventKey=="HELLO")  
                res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
        }  
        else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "LOCATION")  
        {  
            res = sendTextMessage(wx, "您的位置是经度:" + wx.Latitude + ",维度是:" + wx.Longitude+",地理经度为:"+wx.Precision);  
        }  
        else  
        {  
            if (wx.MsgType == "text" && wx.Content == "你好")  
            {  
                res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
            }  
            else if (wx.MsgType == "voice")  
            {  
                res = sendTextMessage(wx, wx.Recognition);  
            }  
            else if (wx.MsgType == "location")  
            {  
                res = sendTextMessage(wx, "您发送的位置是:" + wx.Label + ";纬度是:" + wx.Location_X + ";经度是:" + wx.Location_Y + ";缩放比例为:" + wx.Scale);  
            }  
            else  
            {  
                res = sendTextMessage(wx, "你好,未能识别消息!");  
            }  
        }  
  
        Response.Write(res);  
    }  
 protected void Page_Load(object sender, EventArgs e)  
    {  
  
        wxmessage wx = GetWxMessage();  
        string res = "";  
  
  
        if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "subscribe")  
        {  
            string content = "";  
            if (!wx.EventKey.Contains("qrscene_"))  
            {  
                content = "/:rose欢迎北京永杰友信科技有限公司/:rose\n直接回复“你好”";  
                res = sendTextMessage(wx, content);  
            }  
            else  
            {  
                content = "二维码参数:\n" + wx.EventKey.Replace("qrscene_", "");  
                res = sendTextMessage(wx, content);  
            }  
        }  
  
        else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.ToLower() == "scan")  
        {  
            string str = "二维码参数:\n" + wx.EventKey;  
            res = sendTextMessage(wx, str);  
        }  
        else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "CLICK")  
        {  
            if(wx.EventKey=="HELLO")  
                res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
        }  
        else if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "LOCATION")  
        {  
            res = sendTextMessage(wx, "您的位置是经度:" + wx.Latitude + ",维度是:" + wx.Longitude+",地理经度为:"+wx.Precision);  
        }  
        else  
        {  
            if (wx.MsgType == "text" && wx.Content == "你好")  
            {  
                res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");  
            }  
            else if (wx.MsgType == "voice")  
            {  
                res = sendTextMessage(wx, wx.Recognition);  
            }  
            else if (wx.MsgType == "location")  
            {  
                res = sendTextMessage(wx, "您发送的位置是:" + wx.Label + ";纬度是:" + wx.Location_X + ";经度是:" + wx.Location_Y + ";缩放比例为:" + wx.Scale);  
            }  
            else  
            {  
                res = sendTextMessage(wx, "你好,未能识别消息!");  
            }  
        }  
  
        Response.Write(res);  
    }  

 

       好了,完成,这样当你开启你的微信“获得用户位置信息”的时候微信平台会提醒你,是仅进入会话第一次获取,还是每个5秒获取一次,如果你选择了后者,你就会看到,每5秒会反馈给你一个地理位置的信息。
       这里面需要非常注意的是:我按照这样认为没有问题了,但是怎么也获得不了信息,那是因为我在进入会话的时候,你会看到你的手机GPS在搜索,在GPS定位以前,是不会看到内容的。可以这样理解,当你GPS搜索定位后,才会触发获得用户位置信息的事件,这一点并不是我想象的通过基站定位也可以获得大致的位置,这一点需要开发者注意,我就是弄了半天,等我出门儿,手机定位了无意间看到了回复,这才恍然大悟。
       说到这里可以各位会问只知道经纬度坐标有什么用?又不是具体位置。其实不然,我们可以使用多种方法知道位置详细的信息,例如我们可以通过BaiduMap API的地址反向解析指导这个坐标在那个城市,那个街道等内容,甚至可以知道附近的情况,这里就不再多说了,以后有机会和大家一起来谈谈BaiduMap

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