ResourceDictonary WPF中eventsetter中ListviewItem的PreviewMouseLeftButtonDown事件 [英] PreviewMouseLeftButtonDown event for ListviewItem in eventsetter in ResourceDictonary WPF

问题描述

应用程序使用主题文件（ResourceDictionary）和整个应用程序的样式和控件。在这里我需要添加  ListViewItem的EventSetter。

Application uses Theme file (ResourceDictionary) with style for whole application and the controls. Here i need to add  EventSetter for ListViewItem.

<ListView.ItemContainerStyle>
   <Style TargetType="ListViewItem">
        <EventSetter Event="PreviewMouseLeftButtonDown" Handler="" />
   </Style>
</ListView.ItemContainerStyle>

此事件未设置为该项，因为它具有style = ItemStyle"
$

This event is not set to the item because it has the style=ItemStyle"

<Style x:Key="ItemsStyle" TargetType="{x:Type ListViewItem}">       
        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ListViewItem}">
                    <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

推荐答案

不完全了解您的问题试图解决的问题。

Not fully understand what is your question try to solved.

< span class ="x_x_x_x_short_text"id ="x_x_x_x_result_box"lang ="en"tabindex =" - 1"> WPF元素一次只能应用一种样式。

如果你有 tyle 哪个应该继承另一个，你可以
尝试 BasedOn 属性，用于设置样式的默认值。

If you have a style which should inherit another one, You can try the BasedOn property to set a default value for a style.

 <Style x:Key="ListViewItemBasedStyle" TargetType="ListViewItem">
        <EventSetter Event="PreviewMouseLeftButtonDown" Handler="" />
   </Style>

<Style x:Key="ItemsStyle" BasedOn="{StaticResource ListViewItemBasedStyle}" TargetType="{x:Type ListViewItem}">       
        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ListViewItem}">
                    <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

关于WPF中的样式，您可以看到：
https://docs.microsoft.com/en-us/dotnet/api/system.windows.style。 basedon？view = netframework-4.7.1

About Style in WPF, You can see: https://docs.microsoft.com/en-us/dotnet/api/system.windows.style.basedon?view=netframework-4.7.1

如果我有任何误解，也许你可以改写你的问题并给我们更多的背景。

If I have any misunderstanding, maybe you can rephrase your question and give us more context.

此致

Bob

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