Question

WPF如何重置Combobox下拉菜单里的值为初始状态

Answer 1

<!-- 下拉框只读切换按钮 -->

<Style x:Key="ComboBoxReadonlyToggleButton" TargetType="{x:Type ToggleButton}">

<Setter Property="OverridesDefaultStyle" Value="true"/>

<Setter Property="IsTabStop" Value="false"/>

<Setter Property="Focusable" Value="false"/>

<Setter Property="ClickMode" Value="Press"/>

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type ToggleButton}">

<Border x:Name="Chrome"

BorderBrush="{TemplateBinding BorderBrush}" 

Background="{TemplateBinding Background}" 

CornerRadius="3" 

BorderThickness="0"

Margin="0,0,-0.2,0"

SnapsToDevicePixels="true">

<Grid HorizontalAlignment="Right" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}">

<Path x:Name="Arrow" 

Data="{StaticResource DownArrowGeometry}" 

Fill="Black" 

HorizontalAlignment="Center" 

Margin="1,1,0,0" 

VerticalAlignment="Center"/>

</Grid>                         

</Border>

<ControlTemplate.Triggers>

<!-- 默认的按钮样式 -->

<Trigger Property="IsEnabled" Value="true">

<Setter Property="Fill" TargetName="Arrow" Value="#AFAFAF"/>

<Setter Property="Background" TargetName="Chrome" Value="{StaticResource ButtonNormalBackground}"/>

</Trigger>

<!-- 鼠标经过时的样式 -->

<Trigger Property="IsMouseOver" Value="true">

<Setter Property="Background" TargetName="Chrome" Value="{StaticResource ButtonMouseOverBackground}"/>

</Trigger>

<!-- 鼠标获得焦点时的样式 -->

<Trigger Property="IsFocused" Value="true">

<Setter Property="Background" TargetName="Chrome" Value="{StaticResource ButtonFocusedBackground}"/>

</Trigger>

</ControlTemplate.Triggers>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

Answer 2

你拿一个变量 记录一下 初始值 就可以啊。。。想恢复的时候 就拿初始值 去替换啊~