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 re【文章转自：中东服务器】sponse.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。