天气预报的获取

 　　好久没有写技术文章了，2010年工作太忙，奔波在国内各地，也没什么时间关注一些技术方面的事情，最近有一个项目封闭开发，有些时间来写些琐碎的东西，就当是整理下最近的东西吧，没什么技术价值，纯粹玩玩而已。

　　本篇是获取QQ天气预报信息，获取的是杭州的当天天气，如果需要获取未来三天以及其他城市的，做成配置即可，本人比较懒，简单的做该做的就OK了，下面是代码实现部分，纯粹抓取，没使用正则匹配，以前做过一个星座获取的，有时间的话一会一起贴下。

 

 1     /// <summary>
 2     /// 返回天气ArrayList
 3     /// [0]日期
 4     /// [1]白天天气图片
 5     /// [2]夜晚天气图片
 6     /// [3]白天天气描述
 7     /// [4]夜晚天气描述
 8     /// [5]白天天气温度
 9     /// [6]夜晚天气温度
10     /// </summary>
11     /// <returns></returns>
12     private ArrayList QQWeather()
13     {
14         string Url = "http://weather.news.qq.com/inc/07_dc255.htm";
15         string GetStr = string.Empty;
16         WebClient MyWeb = new WebClient();
17         MyWeb.Credentials = CredentialCache.DefaultCredentials;
18         //MyWeb.Encoding = encode;
19         GetStr = Encoding.Default.GetString(MyWeb.DownloadData(Url));
20 
21         ArrayList arr = new ArrayList();  //保存天气情况
22         string WeatherDetails = SubHtml(GetStr, "<strong>72小时天气预报</strong>", "</div></body>");  //获取出72小时内的天气
23         WeatherDetails = SubHtml(WeatherDetails, "<table width=\"175\" border=\"0\" align=\"center\" cellpadding=\"0\" cellspacing=\"0\">", "</table>");  //获取出当天的天气
24         string Date = string.Empty;  //日期
25         string WeatherDescription = string.Empty;               //总体天气描述
26         string DayWeatherImage = "";                            //白天天气图片
27         string NightWeatherImage = "";                          //夜间天气图片
28         string DayWeatherDescription = string.Empty;            //白天天气描述
29         string NightWeatherDescription = string.Empty;          //夜间天气描述
30         string Temperature = string.Empty;                      //总体天气温度
31         string DayTemperature = string.Empty;                   //白天天气温度
32         string NightTemperature = string.Empty;                 //夜间天气温度
33 
34         Date = SubHtml(WeatherDetails, "<td height=\"23\" align=\"center\" bgcolor=\"#EEEEEE\">", "</td>");
35         WeatherDescription = SubHtml(WeatherDetails, "<td height=\"57\" align=\"center\" bgcolor=\"#EEF3F8\">", "<br>");
36         NightWeatherImage = SubHtml(WeatherDetails, "<td height=\"60\" align=\"center\">\n<img width=\"44\" height=\"44\" src=\"", "\">&#160;\n");
37         DayWeatherImage = SubHtml(WeatherDetails, "\t<img width=\"44\" height=\"44\" src=\"", "\">\n</td>");
38         Temperature = SubHtml(WeatherDetails, "<br>", "\n<br>");
39         if (WeatherDetails.IndexOf("转") != -1)
40         {
41             DayWeatherDescription = WeatherDescription.Split('转')[1];
42             NightWeatherDescription = WeatherDescription.Split('转')[0];
43         }
44         else
45         {
46             DayWeatherDescription = WeatherDescription;
47             NightWeatherDescription = WeatherDescription;
48         }
49         if (Temperature.IndexOf("～") != -1)
50         {
51             DayTemperature = Temperature.Split('～')[1];
52             NightTemperature = Temperature.Split('～')[0];
53         }
54         else
55         {
56             DayTemperature = Temperature;
57             NightTemperature = Temperature;
58         }
59 
60         arr.Add(Date);
61         arr.Add(DayWeatherImage);
62         arr.Add(NightWeatherImage);
63         arr.Add(DayWeatherDescription);
64         arr.Add(NightWeatherDescription);
65         arr.Add(DayTemperature);
66         arr.Add(NightTemperature);
67 
68         return arr;
69     }

 

截取的方法

 

 1     /// <summary>
 2     /// 字符截取
 3     /// </summary>
 4     /// <param name="data">源字符串</param>
 5     /// <param name="f">起始字符</param>
 6     /// <param name="b">结束字符</param>
 7     /// <returns></returns>
 8     private string SubHtml(string data, string f, string b)
 9     {
10         int startIndex = 0;
11         int index = 0;
12         startIndex = data.IndexOf(f, index);
13         if (startIndex == -1)
14         {
15             return "";
16         }
17         index = data.IndexOf(b, startIndex);
18         if (index == -1)
19         {
20             return "";
21         }
22         return data.Substring(startIndex + f.Length, (index - startIndex) - f.Length);
23     }

 

 

下面是输出测试

 

 1 ArrayList arrWeather = QQWeather();
 2 string strWeather = string.Empty;
 3 strWeather += arrWeather[0].ToString() + "<br />";
 4 strWeather += "白天：<img src=\"" + arrWeather[1].ToString() + "\" border=0 />　";
 5 strWeather += arrWeather[3].ToString() + "　";
 6 strWeather += arrWeather[5].ToString() + "<br />";
 7 strWeather += "夜晚：<img src=\"" + arrWeather[2].ToString() + "\" border=0 />　";
 8 strWeather += arrWeather[4].ToString() + "　";
 9 strWeather += arrWeather[6].ToString() + "<br />";
10 Response.Write(strWeather);

 

下面是输出效果截图：

　　

马上也要春节了，过完春节可能会有些时间，最近也在整理一套体系，有时间会多写的文章。