WPF ToggleButton不正確的渲染行爲

Question

這裏發生了什麼，以及如何做一個解決方法？

1. 按MyToggleButton。現在看起來像立即按下（選中）。
2. 與此同時MyToggleButton_Checked處理程序禁用MyToggleButton。
3. 現在按非切換按鈕「啓用」。我們看到了什麼？ MyToggleButton看起來像啓用。好。但是等一下，現在看起來沒有按下！爲什麼？！

XAML：

<StackPanel> 

    <ToggleButton x:Name="MyToggleButton" Content="MyToggleButton" Checked="MyToggleButton_Checked"/> 

    <TextBlock Text="{Binding IsChecked, ElementName=MyToggleButton}" Margin="0,4"/> 

    <Button Name="EnableButton" Content="Enable" Click="EnableButton_Click"/> 
    <Button Name="DisableButton" Content="Disable" Click="DisableButton_Click"/> 

</StackPanel> 

代碼隱藏：

void MyToggleButton_Checked(object sender, RoutedEventArgs e) 
{ 
    MyToggleButton.IsEnabled = false; 
} 


void EnableButton_Click(object sender, RoutedEventArgs e) 
{ 
    MyToggleButton.IsEnabled = true; 
} 

void DisableButton_Click(object sender, RoutedEventArgs e) 
{ 
    MyToggleButton.IsEnabled = false; 
} 

UPD：

上的那一刻，唯一可能的解決方法是：

void EnableButton_Click(object sender, RoutedEventArgs e) 
{ 
    MyToggleButton.IsEnabled = true; 

    var controlTemplate = MyToggleButton.Template; 

    var buttonChrome = (Microsoft.Windows.Themes.ButtonChrome)controlTemplate.FindName("Chrome", MyToggleButton); 

    buttonChrome.RenderPressed = false; 

    buttonChrome.RenderPressed = true; 
} 

還有其他嗎？

UPD2：

另一個解決方法是：

void EnableButton_Click(object sender, RoutedEventArgs e) 
{ 
    MyToggleButton.IsEnabled = true; 

    var controlTemplate = MyToggleButton.Template; 
    MyToggleButton.Template = null; 
    MyToggleButton.Template = controlTemplate; 
} 

但控制在模板替換的瞬間閃爍。

Answer 1

這是我對這個問題的解決方案，這裏是video，用法：

<StackPanel> 
    <ToggleButton x:Name="MyToggleButton" Content="MyToggleButton" Checked="MyToggleButton_Checked" 
        l:CorrectToggleButtonCheckedEnableBehavior.IsActive="True"/> 
    <Button Name="EnableButton" Content="Enable" Click="EnableButton_Click"/> 
</StackPanel> 

和附加的行爲的源代碼：

public static class CorrectToggleButtonCheckedEnableBehavior 
{ 
    public static bool GetIsActive(ToggleButton toggleButton) 
    { 
     return (bool)toggleButton.GetValue(IsActiveProperty); 
    } 

    public static void SetIsActive(ToggleButton toggleButton, bool value) 
    { 
     toggleButton.SetValue(IsActiveProperty, value); 
    } 

    public static readonly DependencyProperty IsActiveProperty = 
     DependencyProperty.RegisterAttached("IsActive", typeof(bool), typeof(CorrectToggleButtonCheckedEnableBehavior), 
     new UIPropertyMetadata(false, OnIsActiveChanged)); 

    static void OnIsActiveChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
    { 
     var toggleButton = (ToggleButton)d; 

     if (GetIsActive(toggleButton)) 
     { 
      toggleButton.IsEnabledChanged += new DependencyPropertyChangedEventHandler(ToggleButton_IsEnabledChanged); 
     } 
     else 
     { 
      toggleButton.IsEnabledChanged -= new DependencyPropertyChangedEventHandler(ToggleButton_IsEnabledChanged); 
     } 
    } 

    static void ToggleButton_IsEnabledChanged(object sender, DependencyPropertyChangedEventArgs e) 
    { 
     var toggleButton = (ToggleButton)sender; 

     if (toggleButton.IsEnabled && (toggleButton.IsChecked ?? false)) 
     { 
      Invalidate(toggleButton); 
     } 
    } 

    static void Invalidate(ToggleButton toggleButton) 
    { 
     var controlTemplate = toggleButton.Template; 
     toggleButton.Template = null; 
     toggleButton.Template = controlTemplate; 
    } 
}