Google API 天气数据缓存到一个XML中 

 1 //通过Google API 获取天气数据 并读取存入 XML中 
 2  
 3 private void CreateXML()
 4  {
 5  XmlNodeList weekList = GetWeatherXML();
 6  string strXml = "<weather></weather>";
 7  doc.LoadXml(strXml);
 8  
 9 foreach (var obj in weekList)
10  {
11  XmlNode xmlNode = obj as XmlNode;
12  XmlElement newElem = doc.CreateElement("forecast_conditions");
13  doc.DocumentElement.AppendChild(newElem);
14  XmlElement weekElem = doc.CreateElement("day_of_week");
15  weekElem.InnerText = xmlNode.SelectSingleNode("day_of_week").Attributes["data"].InnerText;
16  doc.LastChild.LastChild.AppendChild(weekElem);
17  XmlElement lowElem = doc.CreateElement("low");
18  lowElem.InnerText = xmlNode.SelectSingleNode("low").Attributes["data"].InnerText;
19  doc.LastChild.LastChild.AppendChild(lowElem);
20  XmlElement highElem = doc.CreateElement("high");
21  highElem.InnerText = xmlNode.SelectSingleNode("high").Attributes["data"].InnerText;
22  doc.LastChild.LastChild.AppendChild(highElem);
23  XmlElement iconElem = doc.CreateElement("icon");
24  iconElem.InnerText = xmlNode.SelectSingleNode("icon").Attributes["data"].InnerText;
25  doc.LastChild.LastChild.AppendChild(iconElem);
26  XmlElement conditionElem = doc.CreateElement("condition");
27  conditionElem.InnerText = xmlNode.SelectSingleNode("condition").Attributes["data"].InnerText;
28  doc.LastChild.LastChild.AppendChild(conditionElem);
29  }
30  
31 doc.PreserveWhitespace = true;
32  doc.Save("data.xml");
33  }
34  
35 //在APP.Config中添加AppSetting key 方便替换Google API的访问地址的修改
36  
37 <configuration>
38  <appSettings>
39  <add key="googleAPI" value="http://www.google.com.hk/ig/api?hl=zh-cn#weather="/>
40  </appSettings>
41 </configuration>
42  
43 //通过API 获取谷歌的天气数据信息 
44  
45 public XmlNodeList GetWeatherXML()
46  {
47  string con = ConfigurationManager.AppSettings["googleAPI"].ToString();
48  string googleAPI = con.Replace("#", "&").ToString();
49  XmlNodeList weekList = null;
50  try
51  {
52  XmlDocument xmlDocument = GoogleWeatherAPI_ParserXML(@googleAPI);
53  weekList = xmlDocument.SelectNodes("xml_api_reply/weather/forecast_conditions");
54  
55 
56 }
57  catch
58  {
59  } return weekList;
60  }
61  
62 //解析XML 通过Google API 获取天气数据
63  
64 private XmlDocument GoogleWeatherAPI_ParserXML(string baseUrl)
65  {
66  HttpWebRequest GWP_Request;
67  HttpWebResponse GWP_Response = null;
68  XmlDocument GWP_XMLdoc = null;
69  try
70  {
71  GWP_Request = (HttpWebRequest)WebRequest.Create(string.Format(baseUrl));
72  GWP_Request.UserAgent = @"Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.4) Gecko/20070515 Firefox/2.0.0.4";
73  GWP_Response = (HttpWebResponse)GWP_Request.GetResponse();
74  GWP_XMLdoc = new XmlDocument();
75  GWP_XMLdoc.Load(GWP_Response.GetResponseStream());
76  }
77  catch (Exception ex)
78  {
79  Console.WriteLine(ex.Message);
80  }
81  GWP_Response.Close();
82  return GWP_XMLdoc;
83  }
84  
85 //更新XML中的数据信息
86  
87 private void UpdateXML() 
88 {
89  string strXmlPath = Application.StartupPath + "\\data.xml";
90  doc.Load(strXmlPath);
91  xe = doc.FirstChild as XmlElement;
92  XmlNode xnRC = xe.LastChild.LastChild.SelectSingleNode("day_of_week");
93  if (xnRC != null)
94  {
95  xnRC.InnerText = "星期八";
96  doc.Save(strXmlPath);
97  }
98  }

 

posted @ 2012-03-09 11:05  都市夜归人  阅读(194)  评论(0)    收藏  举报