c# - WPF 双向绑定(bind) XML

Question

我正在努力掌握 WPF，更具体地说，是执行 xml 文件的两种方式绑定(bind)。我应该使用 XMLDataProvider 还是他们的另一个(更好的)选择？数据显示正常，但当我更改条目时，更改不会反射(reflect)在 xml 文件中。

XML:

    <?xml version="1.0" encoding="utf-8" ?>
<Licence>
 <Market>
  <Name>DAX</Name>
  <Begin>01/01/2010</Begin>
  <End>01/04/2010</End>
 </Market>
 <Market>
  <Name>DJI</Name>
  <Begin>01/07/2010</Begin>
  <End>01/10/2010</End>
 </Market>
</Licence>

XAML:

<Window x:Class="WpfApplication5.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Window.Resources>
    <DataTemplate x:Key="LicenceTemplate"> 
        <Label Content="{Binding XPath=Name}"/>
    </DataTemplate>
</Window.Resources>
<Grid>
    <Grid.DataContext>
        <XmlDataProvider x:Name="XMLData" Source="XMLFile1.xml" XPath="Licence/Market"/>

    </Grid.DataContext>
    <StackPanel>
        <DataGrid x:Name="DataGridLic"  ItemsSource="{Binding}" AutoGenerateColumns="False" Height="200" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="300" CellEditEnding="DataGridLic_CellEditEnding">
            <DataGrid.Columns>
                <DataGridTextColumn x:Name="nameColumn" Binding="{Binding XPath=Name, Mode=TwoWay}" Header="Name" Width="100" Foreground="#FFC28383" />
                <DataGridTextColumn x:Name="BegColumn" Binding="{Binding XPath=Begin, Mode=TwoWay}" Header="Begin" Width="100" Foreground="#FFC14040" />
                <DataGridTextColumn x:Name="EndColumn" Binding="{Binding XPath=End, Mode=TwoWay}" Header="End" Width="100" Foreground="#FFC14040" />
            </DataGrid.Columns>
        </DataGrid>


    </StackPanel>
</Grid>

代码隐藏:

 public MainWindow()
    {
        InitializeComponent();
    }

    private void DataGridLic_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
    {
       XMLData.Document.Save("XMLFile1.xml");
    }

更新:一些有用的 xml 数据绑定(bind)资源:

http://msdn.microsoft.com/en-us/library/bb669141.aspx

http://msdn.microsoft.com/en-us/library/cc165615.aspx

Answer 1

使用 XMLDataProvider 没问题。您只需要确保您正在读取和写入同一个 XML 文件。

只需按如下方式更新您的代码；

public MainWindow()
{
    InitializeComponent();
    var xmlFilePath = @"c:\whatever\XMLFile1.xml";
    XMLData.Source = new Uri(xmlFilePath);
}

private void DataGridLic_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
   var xmlSource = XMLData.Source.LocalPath;
   XMLData.Document.Save(xmlSource);
}