我有大约12个需要自定义HeaderTemplate
的扩展程序。 HeaderTemplate
有一个文本块,用于显示标题文本以及一个按钮。该按钮具有自定义控件模板,以便我可以在Path
内将该按钮显示为VisualBrush
。
<Expander VerticalAlignment="Top"
Header="Fields"
IsExpanded="True">
<Expander.HeaderTemplate>
<DataTemplate>
<DockPanel LastChildFill="False">
<TextBlock VerticalAlignment="Center"
DockPanel.Dock="Left"
FontSize="14"
Foreground="{DynamicResource IdealForegroundColorBrush}"
Text="{Binding}"/>
<Button DockPanel.Dock="Right" Margin="0 0 10 0"
Command="{Binding RelativeSource={RelativeSource AncestorType=Expander}, Path=DataContext.AddFieldCommand}">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Rectangle Fill="Transparent" />
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
Content="{TemplateBinding Content}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</Grid>
</ControlTemplate>
</Button.Template>
<Rectangle Width="20" Height="20" Fill="{DynamicResource EditIconBrush}" />
</Button>
</DockPanel>
</DataTemplate>
</Expander.HeaderTemplate>
我想在所有12个Expanders
中重复使用此模板,但需要指定模板中的按钮将使用的图标和命令。我该怎么做呢?这可以通过将数据模板分解为一系列模板来实现吗?我想要做的是将模板移动到静态资源
<Expander VerticalAlignment="Top"
Header="Fields"
IsExpanded="True"
HeaderTemplate="{StaticResource IconHeader}">
我只是不确定如何为模板提供它应该使用的命令和图标资源。 Dependency属性在这里有意义吗?
感谢。
答案 0 :(得分:2)
我相信至少有办法实现这一目标。首先是从Expander继承,使用您的Dependency属性扩展它并在DataTemplate中绑定它们。
另一种方法是创建一些附加属性,并在DataTemplate中绑定它们,如下所示:
public class TemplateConfig
{
public static readonly DependencyProperty CommandProperty = DependencyProperty.RegisterAttached("Command", typeof (ICommand), typeof (TemplateConfig), new PropertyMetadata(default(ICommand)));
public static void SetCommand(DependencyObject element, ICommand value)
{
element.SetValue(CommandProperty, value);
}
public static ICommand GetCommand(DependencyObject element)
{
return (ICommand) element.GetValue(CommandProperty);
}
public static readonly DependencyProperty IconProperty = DependencyProperty.RegisterAttached("Icon", typeof (VisualBrush), typeof (TemplateConfig), new PropertyMetadata(default(VisualBrush)));
public static void SetIcon(DependencyObject element, VisualBrush value)
{
element.SetValue(IconProperty, value);
}
public static VisualBrush GetIcon(DependencyObject element)
{
return (VisualBrush) element.GetValue(IconProperty);
}
}
标题模板:
<DataTemplate x:Key="ExpanderHeaderTemplate">
<DockPanel LastChildFill="False">
<TextBlock VerticalAlignment="Center"
DockPanel.Dock="Left"
FontSize="14"
Text="{Binding}" />
<Button Margin="0 0 10 0"
Command="{Binding Path=(test:TemplateConfig.Command),
RelativeSource={RelativeSource AncestorType=Expander}}"
DockPanel.Dock="Right">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Rectangle Fill="Transparent" />
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Content}" />
</Grid>
</ControlTemplate>
</Button.Template>
<Rectangle Width="20"
Height="20"
Fill="{Binding Path=(test:TemplateConfig.Icon),
RelativeSource={RelativeSource AncestorType=Expander}}" />
</Button>
</DockPanel>
</DataTemplate>
最后扩展器:
<Expander VerticalAlignment="Top"
Header="Fields"
HeaderTemplate="{StaticResource ExpanderHeaderTemplate}"
IsExpanded="True"
test:TemplateConfig.Command="{Binding SomeCommand}"
test:TemplateConfig.Icon="{StaticResource VisualBrush}" />
希望这有帮助。