asp.net实现根据城市获取天气预报的方法

本文实例讲述了asp.net实现根据城市获取天气预报的方法。分享给大家供大家参考，具体如下：

public void getwetheaerbycity(string cityname) {
  string city = cityname;
  string mycity = httputility.urlencode(city, system.text.encoding.getencoding("gb2312"));
  system.net.httpwebrequest request = (system.net.httpwebrequest)system.net.webrequest.create("http://www.sina.com/index.php?city=" + cityname);
  //httpwebrequest 对象 获取getresponse 转换成httpwebresponse
  system.net.httpwebresponse response = request.getresponse() as system.net.httpwebresponse;
  //通过httpwebresponse response.getresponsestream()获取输出流
  stream str = response.getresponsestream();
  streamreader reader = new streamreader(str, system.text.encoding.getencoding("gb2312"));
  string weathhtml = reader.readtoend();
  str.close();
  reader.close();
}

希望本文所述对大家asp.net程序设计有所帮助。