我想在自定义ListBox中使用我的自定义ListBoxItem，并希望在绑定到ItemSource时能够在ListBox DataTemplate中绑定我自己的属性。
我一无所获。我找到的组合总是在Xaml声明的ItemContainerStyle或ItemTemplate样式，但没有任何自定义类接近我的情况。也许我做了一件可怕的错事？
自定义ListBox类：
public class WPM_ListBox : ListBox
{
protected override bool IsItemItsOwnContainerOverride(object item)
{
return (item is WPM_ListBoxItem);
}
protected override DependencyObject GetContainerForItemOverride()
{
return new WPM_ListBoxItem();
}
public WPM_ListBox()
{
this.DefaultStyleKey = typeof(WPM_ListBox);
}
static WPM_ListBox()
{
}
}
这是WPM_ListBoxItem类的简短版本：
public class WPM_ListBoxItem : ListBoxItem
{
public WPM_ListBoxItem()
{
this.DefaultStyleKey = typeof(WPM_ListBoxItem);
}
static WPM_ListBoxItem()
{
BackgroundProperty.OverrideMetadata(typeof(WPM_ListBoxItem),
new FrameworkPropertyMetadata((SolidColorBrush)(new BrushConverter().ConvertFrom("#66767A"))));
}
public string WPM_HeaderContent
{
get { return (string)GetValue(WPM_HeaderContentProperty); }
set { SetValue(WPM_HeaderContentProperty, value); }
}
public static readonly DependencyProperty WPM_HeaderContentProperty =
DependencyProperty.Register("WPM_HeaderContent", typeof(string),
typeof(WPM_ListBoxItem), new PropertyMetadata("WPM_HeaderContent"));
}
这是Generic.xaml：
<Style x:Key="ItemStyle" TargetType="local:WPM_ListBoxItem" >
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="FontFamily" Value="Arial"/>
<Setter Property="Foreground" Value="#E9EEEE" x:Name="foreground"/>
<Setter Property="IsHitTestVisible" Value="True"/>
<Setter Property="Background" Value="Transparent" x:Name="Background_Property"/>
<Setter Property="BorderBrush" Value="#67767A"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="FontWeight" Value="Bold"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:WPM_ListBoxItem" >
<local:WPM_Border IsHitTestVisible="True" Background="Transparent" Margin="1" VerticalAlignment="Top" x:Name="border" Theme="grau" BorderThickness5="1 1 0 0" BorderThickness4="1 1 0 0" BorderThickness3="1 1 0 0" BorderThickness2="1 1 0 0" BorderThickness1="1 1 0 0" >
<local:WPM_Border.Data>
<Grid x:Name="grid" IsHitTestVisible="True" Background="Transparent" Margin="0" >
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="45" Width="Auto"/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition x:Name="row1" />
<RowDefinition x:Name="row2" />
</Grid.RowDefinitions>
<TextBlock VerticalAlignment="Top" FontFamily="Arial" FontWeight="Normal" FontSize="{TemplateBinding WPM_HeaderContenFontSize}" Margin="{TemplateBinding WPM_HeaderContentMargin}" Text="{TemplateBinding WPM_HeaderContent}" Foreground="{TemplateBinding WPM_HeaderContentBrush}" Padding="0 2 0 0" x:Name="headercontent" Grid.ColumnSpan="2" ScrollViewer.CanContentScroll="False"/>
<!--<ContentPresenter />-->
<StackPanel Margin="3 3 0 0" Grid.Row="1" x:Name="stackpanel1" >
<TextBlock HorizontalAlignment="Right" VerticalAlignment="Top" FontWeight="Normal" FontSize="{TemplateBinding WPM_LabelDescriptionFontSize}" Margin="{TemplateBinding WPM_LabelDescriptionMargin}" Text="{TemplateBinding WPM_LabelDescription1}" Foreground="{TemplateBinding WPM_LabelDescriptionBrush1}"/>
<TextBlock HorizontalAlignment="Right" VerticalAlignment="Top" FontWeight="Normal" FontSize="{TemplateBinding WPM_LabelDescriptionFontSize}" Margin="{TemplateBinding WPM_LabelDescriptionMargin}" Text="{TemplateBinding WPM_LabelDescription2}" Foreground="{TemplateBinding WPM_LabelDescriptionBrush2}"/>
</StackPanel>
<StackPanel Margin="3 3 0 0" Grid.Row="1" Grid.Column="1" x:Name="stackpanel2" >
<TextBlock VerticalAlignment="Top" FontWeight="Normal" FontSize="{TemplateBinding WPM_LabelContentFontSize}" HorizontalAlignment="Left" Margin="{TemplateBinding WPM_LabelContentMargin}" Text="{TemplateBinding WPM_LabelContent1}" Foreground="{TemplateBinding WPM_LabelContentBrush1}"/>
<TextBlock VerticalAlignment="Top" FontWeight="Normal" FontSize="{TemplateBinding WPM_LabelContentFontSize}" HorizontalAlignment="Left" Margin="{TemplateBinding WPM_LabelContentMargin}" Text="{TemplateBinding WPM_LabelContent2}" Foreground="{TemplateBinding WPM_LabelContentBrush2}"/>
</StackPanel>
</Grid>
</local:WPM_Border.Data>
</local:WPM_Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="true">
<Setter TargetName="row2" Property="Height" Value="Auto"/>
<Setter TargetName="border" Property="Height" Value="Auto"/>
<Setter Property="Height" Value="Auto"/>
<Setter TargetName="border" Property="BorderThickness1" Value="1 1 0 0"/>
<Setter TargetName="border" Property="BorderThickness2" Value="1 1 0 0"/>
<Setter TargetName="border" Property="BorderThickness3" Value="1 1 0 0"/>
<Setter TargetName="border" Property="BorderThickness4" Value="1 1 0 0"/>
<Setter TargetName="border" Property="BorderThickness5" Value="1 1 0 0"/>
<Setter TargetName="headercontent" Property="Padding" Value="3 2 0 0"/>
</Trigger>
<Trigger Property="IsSelected" Value="false">
<Setter TargetName="row2" Property="Height" Value="0"/>
<Setter TargetName="border" Property="Height" Value="35"/>
<Setter Property="Height" Value="35"/>
<Setter TargetName="border" Property="BorderThickness1" Value="0"/>
<Setter TargetName="border" Property="BorderThickness2" Value="0"/>
<Setter TargetName="border" Property="BorderThickness3" Value="0"/>
<Setter TargetName="border" Property="BorderThickness4" Value="0"/>
<Setter TargetName="border" Property="BorderThickness5" Value="0"/>
<Setter TargetName="headercontent" Property="Padding" Value="0 2 0 0"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="BoxStyle" TargetType="local:WPM_ListBox">
<Setter Property="Padding" Value="1"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Top"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
<Setter Property="KeyboardNavigation.TabNavigation" Value="Once"/>
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<VirtualizingStackPanel/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:WPM_ListBox">
<Grid>
<ScrollViewer x:Name="PART_ScrollViewer"
IsTabStop="False"
Margin="0"
>
<ItemsPresenter/>
</ScrollViewer>
<ContentPresenter x:Name="PART_DropVisualPlaceholder" Visibility="Collapsed" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="ItemContainerStyle" Value="{StaticResource ItemStyle}"></Setter>
</Style>
<Style TargetType="local:WPM_ListBoxItem" BasedOn="{StaticResource ItemStyle}"/>
<Style TargetType="local:WPM_ListBox" BasedOn="{StaticResource BoxStyle}"/>
在Xaml中，我想这样使用它：
<local:WPM_ListBox ItemsSource="{Binding RoutenListe}" Grid.Row="1" HorizontalContentAlignment="Stretch" HorizontalAlignment="Stretch" BorderThickness="0" Margin="0" Padding="0" Background="#32557B" ScrollViewer.CanContentScroll="True" ScrollViewer.VerticalScrollBarVisibility="Auto" >
<local:WPM_ListBox.ItemTemplate >
<DataTemplate >
<local:WPM_ListBoxItem WPM_HeaderContent="{Binding Name}"
WPM_LabelContent1="{Binding Startort}" WPM_LabelContent2="{Binding Zielort}"
Background="Transparent" WPM_HeaderContentMargin="6 2 0 0" WPM_HeaderContenFontSize="24" WPM_LabelContentMargin="3 -4 0 3"
WPM_LabelDescription1="Start:" WPM_LabelDescription2="Ziel:" WPM_LabelDescriptionMargin="10 -4 0 3" />
</DataTemplate>
</local:WPM_ListBox.ItemTemplate>
</local:WPM_ListBox>
我知道我可以用ContentPresenter替换声明的控件，然后只需在DataTemplate中使用Label或其他东西。但那不是Dependencies的用途吗？
如果我使用标准ListBox并在DataTemplate中使用我的自定义ListBoxItem，则会显示我的数据（Binded Data），但“IsSelected”触发器不再起作用。如果我使用我的自定义ListBox与DataTemplate中声明的自定义ListBoxItem，那么只显示我声明的属性（来自声明的DependencyProperties的StandardValues），没有Bindings但IsSelected属性可以工作。
我甚至尝试将所有背景属性设置为透明，HitTest不会失败。
我想念一下吗？
答案 0 :(得分：0)
您使用ItemTemplate错误。 ItemTemplate用于为ListBoxItem的CONTENTS提供模板，因此它不应包含ListBoxItem。
选项1
从您的视图中移除ItemTemplate：
<local:WPM_ListBox ItemsSource="{Binding RoutenListe}"
Grid.Row="1"
HorizontalContentAlignment="Stretch"
HorizontalAlignment="Stretch"
BorderThickness="0" Margin="0" Padding="0"
Background="#32557B"
ScrollViewer.CanContentScroll="True"
ScrollViewer.VerticalScrollBarVisibility="Auto" />
由于您已经完成了WPM_ListBox使用WPM_ListBoxItem作为其默认项容器，并且您已设置ItemContainerStyle，因此它会自动生成它们，而样式将会自动应用它们。
编辑2：问题是你的WPM_ListBox有一系列属性，在这种情况下没有人设置，因此它们保留默认值。为了设置这些属性，您可以再次使用ItemContainerStyle，并使用Bindings将属性绑定到DataContext中的值：
<local:WPM_ListBox ItemsSource="{Binding RoutenListe}"
Grid.Row="1"
HorizontalContentAlignment="Stretch"
HorizontalAlignment="Stretch"
BorderThickness="0" Margin="0" Padding="0"
Background="#32557B"
ScrollViewer.CanContentScroll="True"
ScrollViewer.VerticalScrollBarVisibility="Auto">
<local:WPM_ListBox.ItemContainerStyle>
<Style TargetType="{x:Type local:WPM_ListBoxItem}"
BasedOn="{StaticResource ItemStyle}">
<Setter Property="WPM_HeaderContent"
Value="{Binding Name}" />
<Setter Property="WPM_LabelContent1"
Value="{Binding Startort}" />
<!-- Etc. -->
</Style>
</local:WPM_ListBox.ItemContainerStyle>
</local:WPM_ListBox>
（编辑：如果您想自定义某些特定项目的内容，则需要在ContentPresenter的模板中使用WPM_ListBoxItem，然后使用ItemTemplate指定您希望如何在该特定列中的ContentPresenter内显示数据
选项2
不要覆盖ListBox的默认项容器，而是将WPM_ListBoxItem用作常规ContentControl或类似内容，然后将其添加到您的ItemTemplate ListBox，将您Triggers的{{1}}更改为绑定到实际DataTriggers的{{1}}属性（现在是ListBox生成的常规属性）。
WPM_ListBoxItem.cs：
IsSelected您的ListBoxItem样式触发器：
public class WPM_ListBoxItem : ContentControl
{
...
}
你的观点是XAML：
WPM_ListBoxItem