我试图通过网上世界天气在我的网站上显示天气信息。我使用VS2012和c#来创建它。
我能够从世界天气在线检索数据到XMLDocument类型变量" WP_XMLdoc"。
下的函数。看看下面的代码:
public static XmlDocument WeatherAPI(string sLocation)
{
HttpWebRequest WP_Request;
HttpWebResponse WP_Response = null;
XmlDocument WP_XMLdoc = null;
String Value;
string sKey = "xxxxxxxxxxxxxxxxxxxxxxxxx"; //The API key generated by World Weather Online
string sRequestUrl = "http://api.worldweatheronline.com/free/v1/weather.ashx?format=xml&"; //The request URL for XML format
try
{
//Here we are concatenating the parameters
WP_Request = (HttpWebRequest)WebRequest.Create(string.Format(sRequestUrl + "q=" + sLocation + "&key=" + sKey));
WP_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";
//Making the request
WP_Response = (HttpWebResponse)WP_Request.GetResponse();
WP_XMLdoc = new XmlDocument();
//Assigning the response to our XML object
WP_XMLdoc.Load(WP_Response.GetResponseStream());
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
WP_Response.Close();
return WP_XMLdoc;
}
}
所以,现在我只想从" WP_XMLdoc"中获取XML数据。变量并在我的标签中显示一些细节,如temp_c,windspeed,time等。 我怎么能这样做?
停留在" WP_XMLdoc"下的XML数据如下:
<?xml version="1.0" encoding="UTF-8"?>
<data>
<request>
<type>City</type>
<query>London, United Kingdom</query>
</request>
<current_condition>
<observation_time>04:17 AM</observation_time>
<temp_C>17</temp_C>
<temp_F>63</temp_F>
<weatherCode>143</weatherCode>
<weatherIconUrl>
<![CDATA[http://cdn.worldweatheronline.net/images/wsymbols01_png_64/wsymbol_0006_mist.png]]>
</weatherIconUrl>
<weatherDesc>
<![CDATA[Mist]]>
</weatherDesc>
<windspeedMiles>0</windspeedMiles>
<windspeedKmph>0</windspeedKmph>
<winddirDegree>62</winddirDegree>
<winddir16Point>ENE</winddir16Point>
<precipMM>0.0</precipMM>
<humidity>94</humidity>
<visibility>2</visibility>
<pressure>1010</pressure>
<cloudcover>50</cloudcover>
</current_condition>
<weather>
<date>2014-09-19</date>
<tempMaxC>28</tempMaxC>
<tempMaxF>82</tempMaxF>
<tempMinC>14</tempMinC>
<tempMinF>57</tempMinF>
<windspeedMiles>5</windspeedMiles>
<windspeedKmph>8</windspeedKmph>
<winddirection>SSE</winddirection>
<winddir16Point>SSE</winddir16Point>
<winddirDegree>149</winddirDegree>
<weatherCode>356</weatherCode>
<weatherIconUrl>
<![CDATA[http://cdn.worldweatheronline.net/images/wsymbols01_png_64/wsymbol_0010_heavy_rain_showers.png]]>
</weatherIconUrl>
<weatherDesc>
<![CDATA[Moderate or heavy rain shower]]>
</weatherDesc>
<precipMM>8.3</precipMM>
</weather>
</data>
请帮忙!
答案 0 :(得分:1)
假设您的现有代码成功将XML数据加载到XmlDocument
对象,我们可以使用SelectSingleNode()
传递合适的XPath表达式作为参数来获取XML文档的任何特定部分。例如,要获得<temp_C>
值:
string temp_c = WP_XMLdoc.SelectSingleNode("/data/current_condition/temp_C")
.InnerText;
另一个选择是使用更新的XML API XDocument
。它具有Load()
方法,其功能类似于XmlDocument.Load()
:
XDocument WP_XMLdoc = XDocument.Load(WP_Response.GetResponseStream());
使用这种方法,我们可以简单地将XElement
投射到string
以获得它的价值:
string temp_c = (string)WP_XMLdoc.XPathSelectElement("/data/current_condition/temp_C");
答案 1 :(得分:0)
尝试这样的事情,例如:
var str = @"<your xml here>";
XDocument xdoc = XDocument.Parse(str);
var output = new List<string>();
foreach (var element in xdoc.Element("data").Element("current_condition").Elements())
{
output.Add(string.Format("{0} : {1}",element.Name, element.Value.ToString()));
}
这将遍历current_condition节点的属性,您可以根据需要进行调整以提取所需内容。
答案 2 :(得分:0)