我的窗口中定义了依赖属性,如下所示:
public static readonly DependencyProperty IsGenericUserProperty = DependencyProperty.Register("IsGenericUser", typeof (bool), typeof (MainWindow));
public bool IsGenericUser
{
get { return (bool) GetValue(IsGenericUserProperty); }
set { SetValue(IsGenericUserProperty, value); }
}
在我的窗口构造函数中,我设置了包含按钮的容器的数据上下文:
QuickListButtonsStackPanel.DataContext = this;
我将依赖项属性绑定到按钮的IsEnabled属性:
<Button IsEnabled="{Binding IsGenericUser}" .../>
启动时IsGenericUser为true,因此启用了按钮。当我将IsGenericUser设置为false时,该按钮被禁用。但是,如果我再次使IsGenericUser为true,则按钮没有任何反应,它仍保持禁用状态。 我做错了什么?
谢谢!
编辑: 这是我使用按钮的样式。这种风格导致问题(如果按钮没有自定义样式,它可以正常工作):
<Style x:Key="BlackButtonStyle" TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<ControlTemplate.Resources>
<Storyboard x:Key="MouseOverActivating">
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(Shape.Fill).(GradientBrush.GradientStops)[1].(GradientStop.Color)">
<SplineColorKeyFrame KeyTime="00:00:00" Value="#FF2F2F2F"/>
<SplineColorKeyFrame KeyTime="00:00:00.1270000" Value="#FF2391FF"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="MouseOverDeactivating">
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(Shape.Fill).(GradientBrush.GradientStops)[1].(GradientStop.Color)" Storyboard.TargetName="rectangle">
<SplineColorKeyFrame KeyTime="00:00:00" Value="#FF2391FF"/>
<SplineColorKeyFrame KeyTime="00:00:00.2200000" Value="#FF2F2F2F"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="PressActivating">
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(Shape.Fill).(GradientBrush.GradientStops)[1].(GradientStop.Color)">
<SplineColorKeyFrame KeyTime="00:00:00" Value="#FF2391FF"/>
<SplineColorKeyFrame KeyTime="00:00:00.1370000" Value="#FF48D6FF"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="PressedDeactivating" FillBehavior="Stop" >
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(Shape.Fill).(GradientBrush.GradientStops)[1].(GradientStop.Color)" Storyboard.TargetName="rectangle">
<SplineColorKeyFrame KeyTime="00:00:00" Value="#FF48D6FF"/>
<SplineColorKeyFrame KeyTime="00:00:00.2370000" Value="#FF2391FF"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="DisableActivating">
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(Shape.Fill).(GradientBrush.GradientStops)[1].(GradientStop.Color)">
<SplineColorKeyFrame KeyTime="00:00:00" Value="#FFA7A7A7"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</ControlTemplate.Resources>
<Grid>
<Rectangle Stroke="Transparent" RadiusX="5" RadiusY="5" x:Name="rectangle">
<Rectangle.Fill>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FF000000" Offset="0"/>
<GradientStop Color="#FF2F2F2F" Offset="1"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" RecognizesAccessKey="True" OpacityMask="{x:Null}"/>
<Rectangle Stroke="Transparent" RadiusX="5" RadiusY="5" x:Name="WhiteGlow">
<Rectangle.Fill>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#5BFFFFFF" Offset="0"/>
<GradientStop Color="#00FFFFFF" Offset="0.5"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsCancel" Value="False"/>
<EventTrigger RoutedEvent="FrameworkElement.Loaded"/>
<Trigger Property="IsFocused" Value="True">
<Trigger.ExitActions>
<BeginStoryboard Storyboard="{StaticResource MouseOverActivating}" x:Name="MouseOverActivating_BeginStoryboard2"/>
</Trigger.ExitActions>
<Trigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource MouseOverActivating}" x:Name="MouseOverActivating_BeginStoryboard1"/>
</Trigger.EnterActions>
</Trigger>
<Trigger Property="IsDefaulted" Value="True"/>
<Trigger Property="IsMouseOver" Value="True">
<Trigger.ExitActions>
<BeginStoryboard Storyboard="{StaticResource MouseOverDeactivating}" x:Name="MouseOverDeactivating_BeginStoryboard"/>
</Trigger.ExitActions>
<Trigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource MouseOverActivating}" x:Name="MouseOverActivating_BeginStoryboard"/>
</Trigger.EnterActions>
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Trigger.EnterActions>
<BeginStoryboard x:Name="PressActivating_BeginStoryboard" Storyboard="{StaticResource PressActivating}"/>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard x:Name="PressedDeactivating_BeginStoryboard" Storyboard="{StaticResource PressedDeactivating}"/>
</Trigger.ExitActions>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Trigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource DisableActivating}" x:Name="DisableActivating_BeginStoryboard"/>
</Trigger.EnterActions>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
答案 0 :(得分:5)
如何将属性设置为False / True?如果我按原样复制代码,它可以完美地运行。必须有其他东西,你可能不会期望它影响它,如按钮上的动画或清除绑定的东西。是否有更多可以发布的代码可以帮助澄清可能会做什么?
这是我测试过的代码:
<Window x:Class="WpfApplication6.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1"
Height="300"
Width="300">
<Grid>
<StackPanel x:Name="QuickListButtonsStackPanel">
<Button IsEnabled="{Binding IsGenericUser}"
Content="Bound Button" />
<Button Content="Change Binding"
Click="Button_Click" />
</StackPanel>
</Grid>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
QuickListButtonsStackPanel.DataContext = this;
}
public static readonly DependencyProperty IsGenericUserProperty =
DependencyProperty.Register(
"IsGenericUser",
typeof(bool),
typeof(Window1));
public bool IsGenericUser
{
get { return (bool)GetValue(IsGenericUserProperty); }
set { SetValue(IsGenericUserProperty, value); }
}
private void Button_Click(object sender, RoutedEventArgs e)
{
IsGenericUser = !IsGenericUser;
}
}
编辑: 您也可以添加一个文本框以查看它是否正常工作,
<Button x:Name="uiButton"
IsEnabled="{Binding IsGenericUser}"
Style="{StaticResource BlackButtonStyle}"
Content="Bound Button"/>
<TextBlock Text="{Binding ElementName=uiButton, Path=IsEnabled}" />
看起来问题只在于样式的故事板,如果你添加它,它是否仍然显示IsEnabled在它不应该是的时候是假的?
答案 1 :(得分:0)
尝试
<Button IsEnabled={Binding Path=IsGenericUser}" ... />
不应该要求Path=
,但它可能会产生差异。
通过在数据上下文中使用this
,您确定这是对的吗?这不会使控制本身适应环境。我没有看到你的其余代码,但这似乎不对。
答案 2 :(得分:0)
1)创建了一个名为DisableDeactivating的新故事板并设置了FillBehavior =“Stop”(尼古拉斯的建议) 2)然后,在IsEnabled = false触发器的Trigger.ExitActions中添加了一个用于DisableDeactivating的BeginStoryboard。
答案 3 :(得分:0)
如果任何人遇到相同的问题-很可能您的DataContext没有设置或动态更改为另一个Object。它发生在某些包含大量不同控件的模板中。