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:\MyStudy\Project\Practice\Practice\BindingDemo2XmlDataSource\Xml\Test.xml");
            //XmlDataProvider provider = new XmlDataProvider();
            //provider.Document = doc;
            //provider.XPath = @"/Persons/Person";
            XmlDataProvider provider = new XmlDataProvider();
            provider.Source = new Uri(@"D:\MyStudy\Project\Practice\Practice\BindingDemo2XmlDataSource\Xml\Test.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();
        }
    }
}

 1 <Window x:Class="BindingDemo2XmlDataSource.MainWindow"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 5         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 6         xmlns:local="clr-namespace:BindingDemo2XmlDataSource"
 7         mc:Ignorable="d"
 8         Title="BindingDemo3XmlDataSource" Height="350" Width="525">
 9     <Grid>
10         <Grid.Resources>
11             <local:BackgroundConverter x:Key="backGroundCvt"></local:BackgroundConverter>
12             <local:WidthConverter x:Key="widthCvt"></local:WidthConverter>
13
14         </Grid.Resources>
15         <ListView Margin="10 20" Name="listView">
16             <ListView.View>
17                 <GridView>
18                     <GridViewColumn Header="Id" DisplayMemberBinding="{Binding XPath=@id}" Width="50">
19
20                     </GridViewColumn>
21                     <GridViewColumn Header="Name" DisplayMemberBinding="{Binding XPath=Name}" Width="100">
22
23                     </GridViewColumn>
24                     <GridViewColumn Header="Age" DisplayMemberBinding="{Binding XPath=Age}" Width="100">
25
26                     </GridViewColumn>
27                     <GridViewColumn Header="FavorColor" Width="auto">
28                         <GridViewColumn.CellTemplate>
29                             <DataTemplate >
30                                 <Grid>
31                                     <Grid.ColumnDefinitions>
32                                         <ColumnDefinition Width="*"/>
33                                         <ColumnDefinition Width="*"/>
34                                     </Grid.ColumnDefinitions>
35                                     <TextBlock  Text="{Binding XPath=FavorColor}"
36                                                 Grid.Column="0"
37                                                 Width="{Binding ElementName=listView,Path=ActualWidth,Converter={StaticResource ResourceKey=widthCvt}}"
38                                                 Foreground="{Binding XPath=FavorColor, Converter={StaticResource ResourceKey=backGroundCvt}}"
39                                                 >
40
41                                     </TextBlock>
42                                     <TextBlock Grid.Column="1"
43                                                Background="{Binding XPath=FavorColor, Converter={StaticResource ResourceKey=backGroundCvt}}"
44                                                Width="{Binding ElementName=listView,Path=ActualWidth,Converter={StaticResource ResourceKey=widthCvt}}"
45                                            >
46
47                                     </TextBlock>
48                                 </Grid>
49                             </DataTemplate>
50                         </GridViewColumn.CellTemplate>
51
52
53
54                     </GridViewColumn>
55                 </GridView>
56             </ListView.View>
57         </ListView>
58     </Grid>
59 </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}}"