我有一个这样的代码。
<ListBox Name="lstBox"
ItemsSource="{Binding ViewModelsView}"
SelectedItem="{Binding SelectedAlertViewOutput, Mode=OneWayToSource}">
<ListBox.Style>
<Style TargetType="{x:Type ListBox}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBox}">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}"
Background="{TemplateBinding Background}" Padding="1" >
<ScrollViewer Padding="{TemplateBinding Padding}" >
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</ScrollViewer>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="ItemContainerStyle">
<Setter.Value>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="IsSelected"
Value="{Binding AlertRecord.IsSelected, Mode=TwoWay}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<Grid HorizontalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<controls:AlertExpander
Margin="1"
Value="{Binding AlertRecord.AlertCategory}"
IsExpanded="{Binding Path=IsSelected, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
IsActive="{Binding AlertRecord.IsActive, Mode=OneWay }"
StartTime="{Binding AlertRecord.Timestamp, Mode=OneWay}"
StopTime="{Binding AlertRecord.EndTimestamp, Mode=OneWay}"
AlertId="{Binding AlertRecord.Id, Mode=OneWay}"
<controls:AlertExpander.Content>
<ContentPresenter>
</ContentPresenter>
</controls:AlertExpander.Content>
</controls:AlertExpander>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.Style>
<ListBox.Resources>
<DataTemplate DataType="{x:Type local:AlertUnknownViewModel}">
<local:AlertUnknownView></local:AlertUnknownView>
</DataTemplate>
</ListBox.Resources>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Margin="4">
<ContentPresenter Content="{Binding}"></ContentPresenter>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
ListBox 使用我的控件 AlertExpander 作为 ListBoxItem.
能否创建一个不仅包括类型为 AlertExpander? 我想让另一种类型的元素也使用其上的参数。AlertExpander 取决于。
我有几种类型的控件，它们接受的参数与 AlertExpander但看起来却不一样，我需要在列表中显示所有类型的元素，而不是只显示 AlertExpander.
AlertExpander.xaml:
<Expander
<Control.Style>
<Style TargetType="Expander">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Expander">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<!-- Header -->
<ToggleButton Name="HeaderButton">
<ToggleButton.Style>
<Style TargetType="ToggleButton">
<Setter Property="IsChecked" Value="{Binding IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}, UpdateSourceTrigger=PropertyChanged}"/>
<Setter Property="IsEnabled" Value="{Binding Path=Expandable, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Grid>
<Border Grid.Row="1" BorderThickness="1" BorderBrush="Black"
CornerRadius="{Binding BorderCornerRadius, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}">
</Border>
<!-- Border shade -->
<Border Name="BorderShade" Grid.Row="1" BorderThickness="1" BorderBrush="Transparent" Visibility="Collapsed"
</Border>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Image Grid.RowSpan="2" Margin="10">
<Image.OpacityMask>
<ImageBrush ImageSource="{Binding SelectedItem.IconSource, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}"/>
</Image.OpacityMask>
<Image.Source>
<MultiBinding Mode="OneWay" Converter="{converters:GrayscaleImageSourceConverter}">
<Binding Path="SelectedItem" RelativeSource="{RelativeSource AncestorType=controls:AlertExpander}"/>
<Binding Path="IsActive" RelativeSource="{RelativeSource AncestorType=controls:AlertExpander}"/>
</MultiBinding>
</Image.Source>
</Image>
<StackPanel x:Name="topHeader" Grid.Row="0" Grid.Column="1" Orientation="Horizontal" VerticalAlignment="Bottom">
</StackPanel>
<Label x:Name="bottomHeader" Grid.Row="1" Grid.Column="1" VerticalAlignment="Top" Background="Transparent" Padding="0,2,0,0" FontSize="9pt"
Content="{Binding AlertHeaderTime, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}">
</Label>
</Grid>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="BorderShade" Property="Visibility" Value="Visible"/>
</Trigger>
<DataTrigger Binding="{Binding IsAlertHeaderTimeShown, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}" Value="false">
<Setter TargetName="topHeader" Property="VerticalAlignment" Value="Center"/>
<Setter TargetName="topHeader" Property="Grid.RowSpan" Value="2"/>
<Setter TargetName="bottomHeader" Property="Visibility" Value="Hidden"/>
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Grid>
<Border Grid.Row="1" BorderThickness="1" BorderBrush="Black"
CornerRadius="{Binding BorderCornerRadius, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay, Converter={converters:AlertExpanderCornerRadiusTopConverter}}">
</Border>
<!-- Border shade -->
<Border Name="BorderShade" Grid.Row="1" BorderThickness="1" BorderBrush="Transparent" Visibility="Collapsed"
Background="{Binding MouseOverShade, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}"
CornerRadius="{Binding BorderCornerRadius, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay, Converter={converters:AlertExpanderCornerRadiusTopConverter}}">
</Border>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Image Grid.RowSpan="2" Margin="10">
<Image.OpacityMask>
<ImageBrush ImageSource="{Binding SelectedItem.IconSource, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}"/>
</Image.OpacityMask>
<Image.Source>
<MultiBinding Mode="OneWay" Converter="{converters:GrayscaleImageSourceConverter}">
<Binding Path="SelectedItem" RelativeSource="{RelativeSource AncestorType=controls:AlertExpander}"/>
<Binding Path="IsActive" RelativeSource="{RelativeSource AncestorType=controls:AlertExpander}"/>
</MultiBinding>
</Image.Source>
</Image>
<StackPanel x:Name="topHeader" Grid.Row="0" Grid.Column="1" Orientation="Horizontal" VerticalAlignment="Bottom">
<Label Background="Transparent" Padding="0,0,0,2" FontSize="12pt"
FontWeight="{Binding IsActive, Mode=OneWay, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Converter={converters:BoolToFontWeightConverter}}"
Content="{Binding AlertHeader, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}">
</Label>
<Label Background="Transparent" Padding="4,0,0,2" FontSize="12pt"
FontWeight="{Binding IsActive, Mode=OneWay, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Converter={converters:BoolToFontWeightConverter}}"
Visibility="{Binding IsActive, Mode=OneWay, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Converter={converters:InactiveNoteVisibilityConverter}}"
Content="{Binding InactiveNote, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}">
</Label>
</StackPanel>
<Label x:Name="bottomHeader" Grid.Row="1" Grid.Column="1" VerticalAlignment="Top" Background="Transparent" Padding="0,2,0,0" FontSize="9pt"
Content="{Binding AlertHeaderTime, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}">
</Label>
</Grid>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="BorderShade" Property="Visibility" Value="Visible"/>
</Trigger>
<DataTrigger Binding="{Binding IsAlertHeaderTimeShown, RelativeSource={RelativeSource AncestorType=controls:AlertExpander}, Mode=OneWay}" Value="false">
<Setter TargetName="topHeader" Property="VerticalAlignment" Value="Center"/>
<Setter TargetName="topHeader" Property="Grid.RowSpan" Value="2"/>
<Setter TargetName="bottomHeader" Property="Visibility" Value="Hidden"/>
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</ToggleButton.Style>
</ToggleButton>
<!-- Content -->
<ScrollViewer Name="ContentScrollViewer" Grid.Row="1"
HorizontalScrollBarVisibility="Hidden"
VerticalScrollBarVisibility="Hidden"
HorizontalContentAlignment="Stretch"
VerticalContentAlignment="Bottom"
Visibility="Visible">
<Border Name="ExpanderContentBorder" BorderThickness="1,0,1,1" BorderBrush="Black">
<ContentPresenter ContentSource="Content"/>
</Border>
</ScrollViewer>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Control.Style>
在我开始写代码之前，我想说的是，这是个任务 数据模板而不是控制模板。该 Template 财产采取 ControlTemplate 并用于定义控件的结构。当你从头开始构建一个控件或对一个控件进行重大修改时，通常会用到这个控件。什么是 你 想要做的只是改变现有控件中数据的显示方式。为此，有 DataTemplate 属性，如 ItemTemplate.
说完这些，我为你整理了一些代码，至少应该为你指明正确的方向。
<ListBox Name="lstBox" ItemsSource="{Binding ViewModelsView}" SelectedItem="{Binding SelectedAlertViewOutput, Mode=OneWayToSource}">
<ListBox.Resources>
<DataTemplate DataType="local:AlertRecord" x:Key="AlertExpanderItem">
<controls:AlertExpander Margin="1"
Value="{Binding AlertCategory}"
IsExpanded="{Binding IsSelected, Mode=TwoWay}"
IsActive="{Binding IsActive, Mode=OneWay }"
StartTime="{Binding Timestamp, Mode=OneWay}"
StopTime="{Binding EndTimestamp, Mode=OneWay}"
AlertId="{Binding Id, Mode=OneWay}"/>
</DataTemplate>
<DataTemplate DataType="local:AlertRecord" x:Key="OtherControlItem">
<controls:OtherControl Margin="1"
Value="{Binding AlertCategory}"
IsExpanded="{Binding IsSelected, Mode=TwoWay}"
IsActive="{Binding IsActive, Mode=OneWay }"
StartTime="{Binding Timestamp, Mode=OneWay}"
StopTime="{Binding EndTimestamp, Mode=OneWay}"
AlertId="{Binding Id, Mode=OneWay}"/>
</DataTemplate>
</ListBox.Resources>
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}"/>
</Style>
</ListBox.ItemContainerStyle>
<ListBox.ItemTemplate>
<DataTemplate>
<ContentControl Content="{Binding}">
<ContentControl.Style>
<Style TargetType="ContentControl">
<Setter Property="ContentTemplate" Value="{StaticResource OtherControlItem}"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Value}" Value="0">
<Setter Property="ContentTemplate" Value="{StaticResource AlertExpanderItem}"/>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
...
public class AlertRecord
{
...
public bool HasPositiveValue { get { return Value >= 0 } }
...
}
我首先定义了两个不同的 ItemTemplate里面的里面 Resources 的 ListBox. 你可以为每个你需要使用的不同控件定义一个。注意我没有写"AlertRecord."从束缚。这是因为每个 DataTemplate 实例将有 AlertRecord 作为其 DataContext.
జజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజజ ItemTemplate 属性，我借鉴了这里的这个答案。https:/stackoverflow.coma101917625086631。. 我做了一个 DataTemplate 带着 ContentControl 并使用 Style 改变 ContentTemplate 基于 DataTriggers. 这让你可以根据你的列表项的属性来改变模板。
根据您的评论，样式设置为"OtherControlItem" (非展开器控制)是默认使用的，而非展开器控制是默认使用的。AlertExpanderItem 当 HasPositiveValue 返回true。HasPositiveValue 是你需要添加到 AlertRecord.