Question

我正在尝试创建一个自定义TabItem，它动态添加到WPF窗口中定义的TabControl。我的自定义控件有一个对象，其中包含我想要绑定到模板特定部分的数据。

<Style TargetType="{x:Type local:EntityTabItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:EntityTabItem}">
                <Border>
                    <Grid>
                        <Border x:Name="borderTop" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}"/>
                        <StackPanel Orientation="Horizontal" Margin="0,0,2,0">
                            <!-- Want to bind the FileName to this TextBlock -->
                            <TextBlock VerticalAlignment="Center" Text="{Binding Path=Entity.FileName}" Margin="-1,0,0,0" Padding="6,1,10,1"/>
                            <Button x:Name="closeButton" VerticalAlignment="Center" Content="X" Style="{StaticResource TabCloseButton}"/>
                        </StackPanel>
                    </Grid>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Setter Property="ContentTemplate">
        <Setter.Value>
            <DataTemplate>
                <Grid Background="White">
                    <!-- Want to bind the FileText to this TextBox -->
                    <TextBox Margin="15,0,0,0" BorderBrush="{x:Null}" Text="{Binding Path=Entity.FileText}"/>
                </Grid>
            </DataTemplate>
        </Setter.Value>
    </Setter>
</Style>

这是自定义控件CS文件：

public class EntityTabItem : TabItem
{
    public Entity MyEntity { get; set; }

    public EntityTabItem(string path)
    {
        this.MyEntity = new Entity(path);
    }

    static EntityTabItem()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(EntityTabItem), new FrameworkPropertyMetadata(typeof(EntityTabItem)));
    }
}

我很确定我需要在某处设置DataBinding / Source，但我无法弄清楚在哪里绑定它以使我的TextBlock中的绑定起作用。

老实说，我根本无法绕过DataBinding。有一半的时间，我让它工作得很好而没有意识到如何，而另一半的时间它没有做任何事情。

我还尝试将“Entity”对象实现为DependencyProperty，但无法使其工作。因为我只在CS中创建我的自定义TabItem（从未直接在XAML中使用），这甚至是否重要？

Answer 1

尝试使用DataContext属性，例如：

<Style TargetType="{x:Type local:EntityTabItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:EntityTabItem}">
                <Border>
                    <Grid>
                        <Border x:Name="borderTop" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}"/>
                        <StackPanel Orientation="Horizontal" Margin="0,0,2,0">
                            <!-- Want to bind the FileName to this TextBlock -->
                            <TextBlock VerticalAlignment="Center" Text="{Binding Path=FileName}" Margin="-1,0,0,0" Padding="6,1,10,1"/>
                            <Button x:Name="closeButton" VerticalAlignment="Center" Content="X" Style="{StaticResource TabCloseButton}"/>
                        </StackPanel>
                    </Grid>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Setter Property="ContentTemplate">
        <Setter.Value>
            <DataTemplate>
                <Grid Background="White">
                    <!-- Want to bind the FileText to this TextBox -->
                    <TextBox Margin="15,0,0,0" BorderBrush="{x:Null}" Text="{Binding Path=FileText}"/>
                </Grid>
            </DataTemplate>
        </Setter.Value>
    </Setter>
</Style>


public class EntityTabItem : TabItem
{
    private Entity _myEntity;

    public Entity MyEntity
    {
        get { return _myEntity; }
        set
        {
            _myEntity = value;
            DataContext = value;
        }
    }

    public EntityTabItem(string path)
    {
        this.MyEntity = new Entity(path);
    }

    static EntityTabItem()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(EntityTabItem), new FrameworkPropertyMetadata(typeof(EntityTabItem)));
    }
}

自定义控件中的WPF数据绑定

1 个答案: