我的 View 中有一个按钮,其样式为 staticResource。我有 IsEnabled
绑定(bind)到 bool
在我的 View 模型中并且想要在禁用时更改背景。
我尝试使用 Style.Triggers
在 IsEnabled = false
但这不会改变背景。
样式.xaml
<Style x:Key="buttonNegative" TargetType="Button">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background" Value="Green"/>
</Trigger>
</Style.Triggers>
</Style>
View .xaml
<Button Style="{StaticResource buttonNegative}" Command="{Binding InversionAxis_Command}" IsEnabled="{Binding SettingsButtonIsEnable}">
<TextBlock Text="{Binding Orientation}"/>
</Button>
View 模型.cs
private bool _settingsButtonIsEnable;
public bool SettingsButtonIsEnable
{
get { return _settingsButtonIsEnable; }
set
{
if (Equals(value, _settingsButtonIsEnable)) return;
_settingsButtonIsEnable = value;
RaisePropertyChanged();
}
}
public ICommand InversionAxis_Command
{
get { return new RelayCommand(InversionAxis, IsSettingsButtonIsEnable); }
}
private bool IsSettingsButtonIsEnable()
{
return _settingsButtonIsEnable;
}
该命令未执行,因为我使用 canExecute 但 SettingsButtonIsEnable 更改时样式未更改
最佳答案
更改禁用的背景比向样式添加触发器更复杂。您必须定义一个自定义 ControlTemplate
:
<Style x:Key="buttonNegative" TargetType="Button">
<Style.Resources>
<Style x:Key="FocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<SolidColorBrush x:Key="Button.Static.Background" Color="#FFDDDDDD"/>
<SolidColorBrush x:Key="Button.Static.Border" Color="#FF707070"/>
<SolidColorBrush x:Key="Button.MouseOver.Background" Color="#FFBEE6FD"/>
<SolidColorBrush x:Key="Button.MouseOver.Border" Color="#FF3C7FB1"/>
<SolidColorBrush x:Key="Button.Pressed.Background" Color="#FFC4E5F6"/>
<SolidColorBrush x:Key="Button.Pressed.Border" Color="#FF2C628B"/>
<SolidColorBrush x:Key="Button.Disabled.Background" Color="Green"/>
<SolidColorBrush x:Key="Button.Disabled.Border" Color="#FFADB2B5"/>
<SolidColorBrush x:Key="Button.Disabled.Foreground" Color="#FF838383"/>
</Style.Resources>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
<ContentPresenter x:Name="contentPresenter" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsDefaulted" Value="true">
<Setter Property="BorderBrush" TargetName="border" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.MouseOver.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.MouseOver.Border}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.Pressed.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.Pressed.Border}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.Disabled.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.Disabled.Border}"/>
<Setter Property="TextElement.Foreground" TargetName="contentPresenter" Value="{StaticResource Button.Disabled.Foreground}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
默认禁用的背景被硬编码到默认模板中,并且不能被样式 setter 覆盖。
关于c# - 当 wpf 中的 IsEnabled 更改时更改按钮属性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57494786/