WPF customcontrol checkbox ischecked 不模板绑定

Question

我正在制作一个自定义控件，使其像一个过滤器一样，您可以使用复选框启用它，当您这样做时，一些字段会出现供用户填写。所以我的自定义控件有一个复选框和一个内容控件，我使用内容控件是因为我希望这些字段是我想要的。当我选中该复选框时，我将 contentcontrol 的高度设置为 Auto，当它未被选中时，我将其设置为 0。这很有效。我还需要在我的视图模型中知道该复选框是否被选中。我的问题是，模板绑定似乎不适用于复选框的 IsChecked 属性。例如，我尝试制作一个名为 IsSelected 的依赖项属性，然后我将复选框的 IsChecked 模板绑定到该 IsSelected 依赖项属性，但它不起作用。当我选中复选框时，IsSelected 不会更改... 那是我的自定义控件通用 XAML

<Style TargetType="{x:Type local:FilterItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:FilterItem}">
                <Border Padding="{TemplateBinding Padding}"
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}">
                    <StackPanel>
                        <CheckBox Name="cbcheck" IsChecked="{TemplateBinding IsSelected}" Content="{TemplateBinding Title}" VerticalContentAlignment="Center"/>
                        <ContentControl Content="{TemplateBinding Content}" Margin="20 0 5 10">
                            <ContentControl.Style>
                                <Style TargetType="ContentControl">
                                    <Style.Triggers>
                                        <DataTrigger Binding="{Binding ElementName=cbcheck, Path=IsChecked}" Value="False">
                                            <Setter Property="Height" Value="0.0"/>
                                        </DataTrigger>
                                        <DataTrigger Binding="{Binding ElementName=cbcheck, Path=IsChecked}" Value="True">
                                            <Setter Property="Height" Value="Auto"/>
                                        </DataTrigger>
                                    </Style.Triggers>
                                </Style>
                            </ContentControl.Style>
                        </ContentControl>
                    </StackPanel>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

这是自定义控件的 .cs，没什么特别的，只有依赖属性

public class FilterItem: Control
{
    public string Title
    {
        get { return (string)GetValue(TitleProperty); }
        set { SetValue(TitleProperty, value); }
    }

    // Using a DependencyProperty as the backing store for Title.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty TitleProperty =
        DependencyProperty.Register("Title", typeof(string), typeof(FilterItem), new PropertyMetadata(null));




    public bool IsSelected
    {
        get { return (bool)GetValue(IsSelectedProperty); }
        set { SetValue(IsSelectedProperty, value); }
    }

    // Using a DependencyProperty as the backing store for IsSelected.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty IsSelectedProperty =
        DependencyProperty.Register("IsSelected", typeof(bool), typeof(FilterItem), new PropertyMetadata(false));





    public FrameworkElement Content
    {
        get { return (FrameworkElement)GetValue(ContentProperty); }
        set { SetValue(ContentProperty, value); }
    }

    // Using a DependencyProperty as the backing store for Content.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty ContentProperty =
        DependencyProperty.Register("Content", typeof(FrameworkElement), typeof(FilterItem), new PropertyMetadata(null));



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

我是这样使用它的：

               <filtercontrol:FilterItem Title="Diamond Coil" IsSelected="{Binding IsDiamondCoil}">
                    <filtercontrol:FilterItem.Content>
                        <StackPanel>
                            <TextBlock Text="Max Lenght:"/>
                            <TextBox Text="{Binding MaxCoilOverallLenght}"/>
                            <TextBlock Text="Min width:"/>
                            <TextBox/>
                            <TextBlock Text="Max Width:"/>
                            <TextBox/>
                            <TextBlock Text="Max Vertical Section:"/>
                            <TextBox/>
                            <TextBlock Text="Max Horizontal Section:"/>
                            <TextBox/>
                        </StackPanel>
                    </filtercontrol:FilterItem.Content>
                </filtercontrol:FilterItem>

依赖项的模板绑定属性我用来设置复选框内容的标题工作得很好。我不明白为什么一个有效而另一个无效。

谢谢。

Answer 1

您可以将 TemplateBinding 替换为 Binding 到 TemplatedParent：

<CheckBox Name="cbcheck" IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected}" Content="{TemplateBinding Title}" VerticalContentAlignment="Center"/>

并将您的 DependencyProperty 声明为 TwoWay:

public static readonly DependencyProperty IsSelectedProperty =
        DependencyProperty.Register("IsSelected", typeof(bool), typeof(FilterItem), new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));

WPF customcontrol checkbox ischecked 不模板绑定

WPF customcontrol checkbox ischecked doesn't templatebind

c#

wpf

custom-controls