.Net 得到星期 和 天气预报

得到星期的效果： 如  星期四

代码实现如下：

private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            this.label1.Content = DateTime.Now.ToLongDateString().ToString();

            string thisdl = DateTime.Today.DayOfWeek.ToString();
            string thisweek = "";
            switch (thisdl)
            {
                case "Monday":
                    thisweek = "星期一";
                    break;
                case "Tuesday":
                    thisweek = "星期二";
                    break;
                case "Wednesday":
                    thisweek = "星期三";
                    break;
                case "Thursday":
                    thisweek = "星期四";
                    break;
                case "Friday":
                    thisweek = "星期五";
                    break;
                case "Saturday":
                    thisweek = "星期六";
                    break;
                case "Sunday":
                    thisweek = "星期日";
                    break;
            }
            label2.Content = thisweek;
       
        }

得到 天气预报的效果如：天气：晴转多云，24℃～13℃

代码实现如下：

public static string GetWeatherByCity(string City)
        {
            string Html = "";       //返回来天气预报源码
            ASCIIEncoding encoding = new ASCIIEncoding();
            string postData = string.Format("city=" + City);
            byte[] data = encoding.GetBytes(postData);
            string weather = string.Empty;
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://php.weather.sina.com.cn/search.php?city=" +City + "&f=1&dpc=1");
                request.Method = "Get";
                request.ContentType = "application/x-www-form-urlencoded ";
                WebResponse response = request.GetResponse();
                Stream s = response.GetResponseStream();
                StreamReader sr = new StreamReader(s, System.Text.Encoding.GetEncoding("GB2312"));
                Html = sr.ReadToEnd();
                s.Close();
                sr.Close();
            }
            catch (Exception err)
            {
                throw new Exception(err.Message);
            }
            //去除多余代码提高效率
            int count = Html.Length;
            int starIndex = Html.IndexOf("<li class=\"li_04\">", 0, count);
            int endIndex = Html.IndexOf("</li>", starIndex);
            Html = Html.Substring(starIndex, endIndex - starIndex);

            try
            {
                #region 得到天气
                int WeatherStartIndex = Html.IndexOf("天气：", 0);
                int WeatherEndIndex = Html.IndexOf("，风力", 0);
                weather = Html.Substring(WeatherStartIndex, WeatherEndIndex - WeatherStartIndex);

                #endregion
            }
            catch (Exception err)
            {

                throw new Exception(err.Message);
            }
            return weather;
        }

  天气预报的实现思路： 读取那个页面的源码  然后在源码中截取自己需要展示的地方。

    注：网上有很多的实现天气预报的方式 ，这只是其中一种 还有引用服务的！

大家可以去借鉴一下！这个只是作为笔记来记录、、