语音播报实时天气

一、 让文本变成声音

     .Net里面自带了一个语音类库： System.Speech，调用系统的语音功能，就能实现string到语音的转换，很简单（记得先把电脑音量调大一下）：

      
   // 
   Add System.Speech reference first 
   
   
   using System.Speech.Synthesis; 
   
   
   
   
   var reader =  
   new SpeechSynthesizer(); 
   
  reader.SpeakAsync( 
   " 
   I'm a programer. Hello, world!  
   "); 
  

    Hello, world! 你听到了……这里我用了SpeakAsync方法，也就是异步执行，不会阻塞主线程。你也可以直接调用Speak()方法，也就是在一个线程里面——突然想到可以利用Speak()方法来调试程序，把断点或者Log换成Speak()： 当别人辛苦的翻阅数百行的日志--而你的电脑用悠扬的语音告诉你：“This user's entity is null, here is a bug!”，高端大气上档次呀！

 

二、 获取本地实时天气

     园子里面有很多获取天气的API文章，这里就不介绍了，给一个CSDN链接，还算比较全：天气预报API接口大全

     我这里用的都是新浪的API，最简单快捷。获取本地的实时天气，分为两步：一、根据电脑公网IP 获取当前城市；二、根据城市获取天气信息。

 
    var webClient =  
   new WebClient() { Encoding = Encoding.UTF8 }; 
   
 
    // 
   Get location city 
   
  
    var location = webClient.DownloadString( 
   " 
   http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json 
   "); 
   
 
    var json =  
   new JavaScriptSerializer().Deserialize<dynamic>(location); 
   
 
    // 
   Read city from utf-8 format 
   
  
    var city = HttpUtility.UrlDecode(json[ 
   " 
   city 
   "]); 
  

   获取到的地理信息是json格式，反序列成dynamic动态类型，不需要再去创建个类去和json数据对应，C#获取json数据就和javascript中的操作差不多了，用了当然这样也就肯定没有VS的智能感知。取到的省市信息都是UTF-8编码的，所以要取出来的话，进行Decode。

 
    // 
   Get weather data(xml format) 
   
   
   string weather = webClient.DownloadString( 
   string.Format( 
   
          
   " 
   http://php.weather.sina.com.cn/xml.php?city={0}&password=DJOYnieT8234jlsK&day=0 
   ", 
   
          HttpUtility.UrlEncode(json[ 
   " 
   city 
   "], Encoding.GetEncoding( 
   " 
   GB2312 
   ")))); 
   
   
   // 
   Console.WriteLine(weather); 
   
   
   var xml =  
   new XmlDocument(); 
   
  xml.LoadXml(weather); 
  

   这次取到的天气信息就是XML格式的了，也很方便。但需要注意的是此，构建URL的时候要把城市采用GB2312格式编码，WebClient需要指定UTF-8格式。天气信息取到了，下面就是编字符串，让它说话了，这里附上全部的代码，总共23行：

 
    
     1      
    // 
    Initialize Speaker 
    
 
     2  
         
    var reader =  
    new SpeechSynthesizer(); 
    
 
     3     reader.Speak( 
    " 
    I'm a programer,Hello, World!  
    "); 
    
 
     4  
    
 
     5      
    var webClient =  
    new WebClient() { Encoding = Encoding.UTF8 }; 
    
 
     6      
    // 
    Get location city 
    
 
     7  
         
    var location = webClient.DownloadString( 
    " 
    http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json 
    "); 
    
 
     8      
    var json =  
    new JavaScriptSerializer().Deserialize<dynamic>(location); 
    
 
     9      
    // 
    Read city from utf-8 format 
    
 
    10  
         
    var city = HttpUtility.UrlDecode(json[ 
    " 
    city 
    "]); 
    
 
    11      
    // 
    Get weather data(xml format) 
    
 
    12  
         
    string weather = webClient.DownloadString( 
    string.Format( 
    
 
    13          
    " 
    http://php.weather.sina.com.cn/xml.php?city={0}&password=DJOYnieT8234jlsK&day=0 
    ", 
    
 
    14         HttpUtility.UrlEncode(json[ 
    " 
    city 
    "], Encoding.GetEncoding( 
    " 
    GB2312 
    ")))); 
    
 
    15      
    // 
    Console.WriteLine(weather); 
    
 
    16  
         
    var xml =  
    new XmlDocument(); 
    
 
    17     xml.LoadXml(weather); 
    
 
    18      
    // 
    Get weather detail 
    
 
    19  
         
    var root = xml.SelectSingleNode( 
    " 
    /Profiles/Weather 
    "); 
    
 
    20      
    var detail = root[ 
    " 
    status1 
    "].InnerText +  
    " 
    ， 
    " + root[ 
    " 
    direction1 
    "].InnerText 
    
 
    21                     + root[ 
    " 
    power1 
    "].InnerText.Replace( 
    " 
    - 
    ",  
    " 
    到 
    ") +  
    " 
    级， 
    " 
    
 
    22                     + root[ 
    " 
    gm_s 
    "].InnerText + root[ 
    " 
    yd_s 
    "].InnerText; 
    
 
    23     reader.SpeakAsync( 
    " 
    今天是 
    " + DateTime.Now.ToShortDateString() +  
    " 
    ， 
    " + city +  
    " 
      
    " + detail);