WPF---数据绑定之Xml数据源（四）

一、场景

现在外部有一xml文件，我们想将该xml文件中的内容绑定到ListView中，该如何实现？

二、实现

xml文件的内容如下：

<?xml version="1.0" encoding="UTF-8"?>
 <Persons>
    <Person id="1">
        <Name>Mary</Name>
        <Age>26</Age>
        <FavorColor>Red</FavorColor>
     </Person>     
    <Person id="2">
        <Name>Mellisa</Name>
        <Age>27</Age>
        <FavorColor>Green</FavorColor>
     </Person>
    <Person id="3">
        <Name>Tom</Name>
        <Age>28</Age>
        <FavorColor>Yellow</FavorColor>
    </Person>
    <Person id="4">
        <Name>Jack</Name>
        <Age>26</Age>
        <FavorColor>Blue</FavorColor>
    </Person>
    <Person id="5">
        <Name>Jim</Name>
        <Age>23</Age>
        <FavorColor>Pink</FavorColor>
    </Person>
</Persons>

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;

namespace BindingDemo2XmlDataSource
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            //XmlDocument doc = new XmlDocument();
            //doc.Load(@"D:MyStudyProjectPracticePracticeBindingDemo2XmlDataSourceXmlTest.xml");
            //XmlDataProvider provider = new XmlDataProvider();
            //provider.Document = doc;
            //provider.XPath = @"/Persons/Person";
            XmlDataProvider provider = new XmlDataProvider();
            provider.Source = new Uri(@"D:MyStudyProjectPracticePracticeBindingDemo2XmlDataSourceXmlTest.xml");
            provider.XPath = @"/Persons/Person";
            listView.DataContext = provider;
            listView.SetBinding(ListView.ItemsSourceProperty, new Binding());
       
        }
    }
    public class BackgroundConverter:IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string myColor = value.ToString();
            SolidColorBrush myBrush = Brushes.Black;
            switch(myColor)
            {
                case "Red":
                    myBrush = Brushes.Red;
                    break;
                case "Green":
                    myBrush = Brushes.Green;
                    break;
                case "Yellow":
                    myBrush = Brushes.Yellow;
                    break;
                case "Blue":
                    myBrush = Brushes.Blue;
                    break;
                case "Pink":
                    myBrush = Brushes.Pink;
                    break;

                default:
                    break;
            }
            return myBrush;
        }
   
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public class WidthConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            double myWidth = (double)value;
            return (myWidth - 270) / 2;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

<Window x:Class="BindingDemo2XmlDataSource.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:BindingDemo2XmlDataSource"
        mc:Ignorable="d"
        Title="BindingDemo3XmlDataSource" Height="350" Width="525">
    <Grid>
        <Grid.Resources>
            <local:BackgroundConverter x:Key="backGroundCvt"></local:BackgroundConverter>
            <local:WidthConverter x:Key="widthCvt"></local:WidthConverter>
            
        </Grid.Resources>
        <ListView Margin="10 20" Name="listView">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Id" DisplayMemberBinding="{Binding XPath=@id}" Width="50">
                        
                    </GridViewColumn>
                    <GridViewColumn Header="Name" DisplayMemberBinding="{Binding XPath=Name}" Width="100">

                    </GridViewColumn>
                    <GridViewColumn Header="Age" DisplayMemberBinding="{Binding XPath=Age}" Width="100">

                    </GridViewColumn>
                    <GridViewColumn Header="FavorColor" Width="auto">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate >
                                <Grid>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="*"/>
                                        <ColumnDefinition Width="*"/>
                                    </Grid.ColumnDefinitions>
                                    <TextBlock  Text="{Binding XPath=FavorColor}"
                                                Grid.Column="0"
                                                Width="{Binding ElementName=listView,Path=ActualWidth,Converter={StaticResource ResourceKey=widthCvt}}"
                                                Foreground="{Binding XPath=FavorColor, Converter={StaticResource ResourceKey=backGroundCvt}}" 
                                                >
                                        
                                    </TextBlock>
                                    <TextBlock Grid.Column="1" 
                                               Background="{Binding XPath=FavorColor, Converter={StaticResource ResourceKey=backGroundCvt}}" 
                                               Width="{Binding ElementName=listView,Path=ActualWidth,Converter={StaticResource ResourceKey=widthCvt}}" 
                                           >
                                        
                                    </TextBlock>
                                </Grid>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>

          

                    </GridViewColumn>
                </GridView>
            </ListView.View>
        </ListView>
    </Grid>
</Window>

运行结果如下：

注：绑定xml中的数据一定要用XPath而不是Path

 Background="{Binding XPath=FavorColor, Converter={StaticResource ResourceKey=backGroundCvt}}"