所以我知道该文件正在读取，因为我测试了在文本块中显示数据但似乎无法将xml解析为我想要的部分，即货币名称和费率，然后将这些添加到列表中选择和执行货币计算后。
using System.Xml.Linq;
namespace Mike_sMoney
{
public partial class MainPage : PhoneApplicationPage
{
//String curName;
//double curRate;
WebClient myClient;
//public class Rate
//{
// public String curName { get; set; }
// public double curRate { get; set; }
//}
// Constructor
public MainPage()
{
InitializeComponent();
myClient = new WebClient();
myClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(myClient_DownloadStringCompleted);
string urlRate = "http://www.ecb.int/stats/eurofxref/eurofxref-daily.xml";
myClient.DownloadStringAsync(new Uri(urlRate));
//XDocument rateDoc = XDocument.Load(new StringReader(urlRate));
//var rates = from rate in rateDoc.Descendants("Cube")
// select new Rate
// {
// curName = rate.Attribute("currency").Value,
// curRate = double.Parse(rate.Attribute("rate").Value)
// };
}
void myClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
//textBlock1.Text = e.Result;
XElement currencyElements = XElement.Parse(e.Result);
var curList = from mRate in currencyElements.Descendants("Cube")
select new ClassRates
{
currency=mRate.Element("currency").Value,
rate=Convert.ToDouble(mRate.Element("rate").Value)
};
fromListBox.ItemsSource = curList;
}
else
{
textBlock1.Text = e.Error.ToString();
}
}
private void convertButton_Click(object sender, RoutedEventArgs e)
{
double x;
//string urlRate = "http://www.ecb.int/stats/eurofxref/eurofxref-daily.xml";
//myClient.DownloadStringAsync(new Uri(urlRate));
//x = urlRate.getElementsByTagName("rate")[0];
}
private void amountTextBox_TextChanged(object sender, TextChangedEventArgs e)
{
amountTextBox.SelectAll();
}
}
}
<gesmes:Envelope xmlns:gesmes="http://www.gesmes.org/xml/2002-08-01" xmlns="http://www.ecb.int/vocabulary/2002-08-01/eurofxref">
<gesmes:subject>Reference rates</gesmes:subject>
<gesmes:Sender>
<gesmes:name>European Central Bank</gesmes:name>
</gesmes:Sender>
<Cube>
<Cube time="2012-04-05">
<Cube currency="USD" rate="1.3068"/>
<Cube currency="JPY" rate="107.06"/>
<Cube currency="BGN" rate="1.9558"/>
<Cube currency="CZK" rate="24.704"/>
<Cube currency="DKK" rate="7.4397"/>
<Cube currency="GBP" rate="0.82420"/>
<Cube currency="HUF" rate="295.95"/>
<Cube currency="LTL" rate="3.4528"/>
<Cube currency="LVL" rate="0.6995"/>
<Cube currency="PLN" rate="4.1707"/>
<Cube currency="RON" rate="4.3728"/>
<Cube currency="SEK" rate="8.8134"/>
<Cube currency="CHF" rate="1.2025"/>
<Cube currency="NOK" rate="7.5692"/>
<Cube currency="HRK" rate="7.4820"/>
<Cube currency="RUB" rate="38.6600"/>
<Cube currency="TRY" rate="2.3468"/>
<Cube currency="AUD" rate="1.2710"/>
<Cube currency="BRL" rate="2.3942"/>
<Cube currency="CAD" rate="1.3042"/>
<Cube currency="CNY" rate="8.2398"/>
<Cube currency="HKD" rate="10.1478"/>
<Cube currency="IDR" rate="11945.92"/>
<Cube currency="ILS" rate="4.8967"/>
<Cube currency="INR" rate="66.8750"/>
<Cube currency="KRW" rate="1479.25"/>
<Cube currency="MXN" rate="16.8244"/>
<Cube currency="MYR" rate="4.0106"/>
<Cube currency="NZD" rate="1.6026"/>
<Cube currency="PHP" rate="55.897"/>
<Cube currency="SGD" rate="1.6476"/>
<Cube currency="THB" rate="40.511"/>
<Cube currency="ZAR" rate="10.2687"/>
</Cube>
</Cube>
</gesmes:Envelope>
非常感谢任何想法或帮助 MH
答案 0 :(得分：0)
您可能遇到了命名空间问题的组合，以及我认为可以定义的＆＃34;可怕的XML＆＃34;问题。 XML有三层节点叫做＃34; Cube＆＃34;，这使得解析起来很困难。
我在下面给出的代码并不是生产代码。相反，我把它呈现给你，这样你就可以看到需要解析的不同元素。
XDocument doc = XDocument.Load(@"c:\temp\xmlfile1.xml");
XNamespace ns = XNamespace.Get("http://www.gesmes.org/xml/2002-08-01");
XNamespace masterNs = XNamespace.Get("http://www.ecb.int/vocabulary/2002-08-01/eurofxref");
var envelope = doc.Element(ns.GetName("Envelope"));
var cubeHolder = envelope.Element(masterNs.GetName("Cube"));
var cubes = cubeHolder.Elements(masterNs.GetName("Cube"));
cubes.ToList().ForEach(cube=>
{
var cubeCurrencies = cube.Descendants(masterNs.GetName("Cube"));
cubeCurrencies.ToList().ForEach(currency =>
{
var country = currency.Attribute("currency").Value;
var rate = currency.Attribute("rate").Value;
System.Console.WriteLine("Country: {0}, rate: {1}", country, rate);
});
});
顺便说一句，我发现的其中一个工具对于处理这些事情是无法估量的有用LinqPad。当你走过它们时能够倾倒出结构的各个部分是非常有帮助的。
---编辑：根据要求，这里是简化的代码---
Dictionary<string, decimal> rates = new Dictionary<string, decimal>();
XNamespace ns = XNamespace.Get("http://www.gesmes.org/xml/2002-08-01");
XNamespace masterNs = XNamespace.Get("http://www.ecb.int/vocabulary/2002-08-01/eurofxref");
doc.Element(ns.GetName("Envelope"))
.Element(masterNs.GetName("Cube"))
.Elements(masterNs.GetName("Cube"))
.ToList().ForEach(cube=>
{
var cubeCurrencies = cube.Descendants(masterNs.GetName("Cube"));
cubeCurrencies.ToList().ForEach(currency =>
{
var country = currency.Attribute("currency").Value;
var rate = currency.Attribute("rate").Value;
rates.Add(country,decimal.Parse(rate));
});
});
答案 1 :(得分：0)
这应该对你有用
编辑; 如果这是您想要的，我不知道。在public partial class MainPage
double usd,gbp, *etc*;
然后，您可以使用for循环遍历var cube中的结果，为每种货币设置一个case并将其与全局变量对齐。下面的示例
void myClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
XElement currencyElements = XElement.Parse(e.Result);
XNamespace ns = "http://www.ecb.int/vocabulary/2002-08-01/eurofxref";
var rates= currencyElements.Descendants(ns + "Cube")
.Where(x => x.Attribute("currency") != null)
.Select(x => new ClassRates
{
curName = x.Attribute("currency").Value,
curRate = Convert.ToDouble(x.Attribute("rate").Value)
});
foreach (var result in rates)
{
switch (result.curName)
{
case "USD":
usd = result.curRate;
break;
case "GBP":
gbp = result.curRate;
break;
default:
break;
}
textBlock1.Text = usd.ToString();//displaying on screen
}
}
else
{
textBlock1.Text = e.Error.ToString();
}
public class ClassRates
{
public String curName { get; set; }
public Double curRate { get; set; }
}
xaml应该是
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<TextBlock Height="30" HorizontalAlignment="Left" Margin="344,6,0,0" Name="textBlock1" Text="TextBlock" VerticalAlignment="Top" />
<ListBox ItemsSource="{Binding ClassRates}" Foreground="Yellow" Height="478" HorizontalAlignment="Center" Margin="2,28,-13,0" Name="listBox1" VerticalAlignment="Top" Width="431" TabIndex="10">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<TextBlock Margin="0,0,0,0" FontSize="26" HorizontalAlignment="Left" Name="tbl1" Text="{Binding curName}" VerticalAlignment="Top" />
<TextBlock Margin="70,0,0,0" FontSize="26" HorizontalAlignment="Left" Name="tbl2" Text="{Binding curRate}" VerticalAlignment="Top" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>