WPF绑定各种数据源之xml数据源
一、WPF绑定各种数据源索引
Binding的基础可参考WPF 绑定基础
二、WPF绑定各种数据源之xml数据源，此时的XML源写在界面了，当然也可以独立成文件。
<Window.Resources>
<Con:BackgroundConverter x:Key="BackgroundConverter"/>
<XmlDataProvider x:Key="myPerson3">
<x:XData>
<PersonF xmlns="">
<person Name="Person1">
<ID>1</ID>
<Name>XiaoA</Name>
<Age>49</Age>
</person>
<person Name="Person2">
<ID>2</ID>
<Name>XiaoB</Name>
<Age>29</Age>
</person>
<person Name="Person3">
<ID>3</ID>
<Name>XiaoC</Name>
<Age>103</Age>
</person>
<person Name="Person4">
<ID>4</ID>
<Name>XiaoD</Name>
<Age>59</Age>
</person>
</PersonF>
</x:XData>
</XmlDataProvider>
</Window.Resources>
下面是绑定的代码。此时需要注意，原来用Path改成了XPath，因为这是XML源，并且ItemsSource 改成 ItemsSource="{Binding Source={StaticResource myPerson3},XPath=/PersonF/person}"
<ListView Height="262" Margin="0,32,56,0" ItemsSource="{Binding Source={StaticResource myPerson3},XPath=/PersonF/person}" VerticalAlignment="Top" Name="listView3" HorizontalAlignment="Right" Width="310">
<ListView.View>
<GridView>
<GridViewColumn Header="编号" DisplayMemberBinding="{Binding XPath=ID}" Width="100" />
<GridViewColumn Header="姓名" DisplayMemberBinding="{Binding XPath=Name}" Width="100"/>
<GridViewColumn Header="年龄" Width="100">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Grid.Column="1" Text="{Binding XPath=Age}" Foreground="{Binding XPath=Age, Converter={StaticResource BackgroundConverter}}"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
下面是值转换
public class BackgroundConverter : IValueConverter
{
#region IValueConverter Members
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
Color color = new Color();
int num = int.Parse(value.ToString());
if (num > 100)
color = Colors.Yellow;
else if (num < 50)
color = Colors.LightGreen;
else
color = Colors.LightPink;
return new SolidColorBrush(color);
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
#endregion
}
效果图：
2.使用外部XML数据源，只需做如下修改
<Window.Resources>
<XmlDataProvider x:Key="myPerson3" Source="/Person.xml"/>
</Window.Resources>
3.如果使用外部XML数据源，并且采用C#代码的形式，则如下：
XmlDocument doc = new XmlDocument();
doc.Load(@"http://www.cnblogs.com/XMLFile1.xml");
XmlDataProvider provider = new XmlDataProvider();
provider.Document = doc;
provider.XPath = @"/PersonF/person";
listView3.DataContext = provider;
listView3.SetBinding(ListView.ItemsSourceProperty, new Binding());
当然也可以使用XMLDataProvider的Source属性，此时只需做如下修改：
XmlDataProvider provider = new XmlDataProvider();
provider.Source = new Uri(@"F:\\XMLFile1.xml");
provider.XPath = @"/PersonF/person";
其他不变。