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我想将我在 XAML 中定义的 TreeView 控件绑定到其代码隐藏类中的属性。我已经阅读了WPF Basic Data Binding FAQ，但是当我尝试使用 XmlDataProvider 作为绑定源时，页面底部注释中的示例不起作用。

如何修改以下代码，以便在 XAML 中而不是在类的构造函数中定义绑定？换句话说，如何修改 TreeView 的ItemsSource属性以引用其代码隐藏类中的属性？

SomeClass.xaml - 作品

<UserControl x:Class="SomeNamespace.SomeClass"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <UserControl.Resources>
        <XmlDataProvider x:Key="SomeTreeData" />
    </UserControl.Resources>
    <TreeView Name="SomeTree" ItemsSource="{Binding Source={StaticResource SomeTreeData}, XPath=*}">
        <TreeView.Resources>
            <HierarchicalDataTemplate DataType="items" ItemsSource="{Binding XPath=*}">
                <TextBlock Text="{Binding XPath=@Header}" />
            </HierarchicalDataTemplate>
            <HierarchicalDataTemplate DataType="item" ItemsSource="{Binding XPath=*}">
                <TextBlock Text="{Binding XPath=@Header}" />
            </HierarchicalDataTemplate>
        </TreeView.Resources>
    </TreeView>
</UserControl>

SomeClass.xaml.cs - 作品

public partial class SomeClass : UserControl
{
    public SomeClass()
    {
        InitializeComponent();

        XmlDataProvider lSomeTreeData
            = this.FindResource("SomeTreeData") as XmlDataProvider;
        lSomeTreeData.Document = new XmlDocument();
        lSomeTreeData.Document.LoadXml("<items xmlns=\"\" Header=\"Some items\"><item Header=\"Some item\" /></items>");
    }
}

SomeClass.xaml - 所需

注意{SOME MAGIC}TreeView 的ItemsSource属性。

<UserControl x:Class="SomeNamespace.SomeClass"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <TreeView Name="SomeTree" ItemsSource="{Binding Source={SOME MAGIC}, XPath=*}">
        <TreeView.Resources>
            <HierarchicalDataTemplate DataType="items" ItemsSource="{Binding XPath=*}">
                <TextBlock Text="{Binding XPath=@Header}" />
            </HierarchicalDataTemplate>
            <HierarchicalDataTemplate DataType="item" ItemsSource="{Binding XPath=*}">
                <TextBlock Text="{Binding XPath=@Header}" />
            </HierarchicalDataTemplate>
        </TreeView.Resources>
    </TreeView>
</UserControl>

SomeClass.xaml.cs - 所需

public partial class SomeClass : UserControl
{
    public XmlDataProvider SomeXmlDataProvider { get; set; }

    public SomeClass()
    {
        InitializeComponent();

        this.SomeXmlDataProvider = new XmlDataProvider();
        this.SomeXmlDataProvider.Document = new XmlDocument();
        this.SomeXmlDataProvider.Document.LoadXml("<items xmlns=\"\" Header=\"Some items\"><item Header=\"Some item\" /></items>");
    }
}
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1 回答 1

1

我发现一种选择是设置控件的DataContext：

<UserControl x:Class="SomeNamespace.SomeClass"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <TreeView ItemsSource="{Binding XPath=/items}">
        <TreeView.Resources>
            <HierarchicalDataTemplate DataType="items" ItemsSource="{Binding XPath=*}">
                <TextBlock Text="{Binding XPath=@Header}" />
            </HierarchicalDataTemplate>
            <HierarchicalDataTemplate DataType="item" ItemsSource="{Binding XPath=*}">
                <TextBlock Text="{Binding XPath=@Header}" />
            </HierarchicalDataTemplate>
        </TreeView.Resources>
    </TreeView>
</UserControl>

public partial class SomeClass : UserControl
{
    public XmlDataProvider SomeXmlDataProvider { get; set; }

    public SomeClass()
    {
        InitializeComponent();

        this.SomeXmlDataProvider = new XmlDataProvider();
        this.SomeXmlDataProvider.Document = new XmlDocument();
        this.SomeXmlDataProvider.Document.LoadXml("<items Header=\"Some items\"><item Header=\"Some item\" /></items>");

        this.DataContext = this.SomeXmlDataProvider.Document;
    }
}
于 2009-06-30T03:53:21.017 回答