使用WPF按钮切换布尔值 [英] Toggle a boolean value with a WPF-button
问题描述
这可能是一个愚蠢的问题，但无论如何，我需要帮助解决这个问题！
我的应用程序中有几个控件。我想有一个按钮（普通的WPF按钮）来控制其他几个WPF控件的IsEnabled属性。也就是说，我希望我的按钮在我的ViewModel中切换一个布尔值（我使用MVVM）
并让其他控件绑定到该属性。
示例：
默认情况下，布尔值应设置为False，这意味着其他控件IsEnable-property也为False
如果用户按下按钮，布尔值应设置为true和其他控件应该得到IsEnabled = True
如果用户再次按下按钮，则布尔值和控件IsEnabled-property应设置为False
我的想法是，我可以通过使用命令（或触发器）来解决这个问题，然后将ValueConverter用于其他控件IsEnabled-property，但我没有这个工作。
<有没有人知道如何让按钮影响ViewModel中的布尔值以启用此行为？
您可以使用一对触发器在xaml中完全处理此问题每个播放故事板的切换按钮上的rs。看看：
< 窗口
xmlns = " http： //schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns：x = " http://schemas.microsoft.com/winfx/2006/xaml "
xmlns：Microsoft_Windows_Themes = " clr-namespace：Microsoft.Windows.Themes; assembly = PresentationFramework.Aero "
的xmlns：d <温泉n style ="color：Blue;"> = " http://schemas.microsoft .com / expression / blend / 2008 " xmlns：mc = " http://schemas.openxmlformats.org / markup-compatibility / 2006 " mc：可忽略 = " d "
x：Class = < span style ="color：Black;">" WpfApplication1.Window1 "
x：名称 = " 窗口 "
标题 = " Window1 "
宽度 = " 200 "
高度 = " 300 " >
< Window.Resources >
< 故事板 x：键 = &quo t; SB_DisableButtons " >
< BooleanAnimationUsingKeyFrames Storyboard.TargetProperty = " （UIElement.IsEnabled） " Storyboard.TargetName = " 按钮 < span style ="color：Black;">" >
< DiscreteBooleanKeyFrame KeyTime = " 0 & " 值 = " ; False " / >
< / BooleanAnimationUsingKeyFrames >
< BooleanAnimationUsingKeyFrames Storyboard.TargetProperty = " （UIElement.IsEnabled） " Storyboard .TargetName = " button1 " >
< DiscreteBooleanKeyFrame KeyTime = " 0 " 值 = " False " />
< / BooleanAnimationUsingKeyFrames >
< BooleanAnimationUsingKeyFrames Storyboard.TargetProperty = " （UIElement.IsEnabled） " Storyboard.TargetName = " button2 " >
< DiscreteBooleanKeyFrame KeyTime = " 0 < span style ="color：Black;">" Value = " False " />
< / BooleanAnimationUsingKeyFrames >
< / 故事板 >
< 故事板 x：Key = " SB_EnableButtons " >
< BooleanAnimationUsingKeyFrames Storyboard.TargetProperty = " （UIElement.IsEnabled） " Storyboard.TargetName = " 按钮 " >
< DiscreteBooleanKeyFrame KeyTime = " 0 " 值 = " 真 " />
< / BooleanAnimationUsingKeyFrames >
< BooleanAnimationUsingKeyFrames Storyboard .TargetProperty = " （UIElement.IsEnabled） " Storyboard.TargetName = " button1 " >
< DiscreteBooleanKeyFrame KeyTime = " 0 " ; 值 = " True " /> ;
< / BooleanAnimationUsingKeyFrames >
< BooleanAnimationUsingKeyFrames < span style ="color：Red ;"> Storyboard.TargetProperty = " （UIElement.IsEnabled） " Storyboard.TargetName = " button2 " >
< DiscreteBooleanKeyFrame KeyTime = " 0 " 值 = " True " />
< / BooleanAnimationUsingKeyFrames >
< span style ="color：Blue;">< / 故事板 >
< / Window.Resources >
< Window.Triggers < span style ="color：Blue;">>
< EventTrigger RoutedEvent = " ToggleButton.Checked " SourceName = " toggleButton " >
< BeginStoryboard x：名称 = < span style ="color：Black;">" SB_EnableButtons_BeginStoryboard " < span style ="color：Red;"> Storyboard = " {StaticResource SB_EnableButtons} " />
< / EventTrigger >
< EventTrigger RoutedEvent = " ToggleButton.Unchecked " SourceName = " toggleButton " >
< BeginStoryboard x：名称 = " SB_DisableButtons_BeginStoryboard " Storyboard = " {StaticResource SB_DisableButtons} " />
< / EventTrigger >
< / Window.Triggers >
< 网格 >
< StackPanel HorizontalAlignment = " 左 " 方向 = " 垂直 " VerticalAlignment = " Top " 宽度 = " 78.257 " >
< ; ToggleButton x：名称 = " toggleButton " 内容 = " ; ToggleButton " d ：LayoutOverrides = " 宽度 " />
< Butto n x：名称 = " 按钮 " 内容 = " 按钮 " IsEnabled = " False " />
< 按钮 x：名称 = " button1 " 内容 = " 按钮 " IsEnabled = " 错误 " />
< 按钮 x：名称 < span style ="color：Blue;"> = " button2 " 内容 = " 按钮 " IsEnabled = " False "/>
< / StackPanel >
< / 网格 >
< / 窗口 >
Hi, this is probably a stupid question but anyway, I need help with this issue!
I have several controls in my application. I would like to have one button (ordinary WPF-button) that controls the IsEnabled-property of several other WPF-controls. That is, I would like my button to toggle a boolean value in my ViewModel (I'm using MVVM) and let the other controls bind to that property.
Example:
By default the boolean value should be set to False which means that the other controls IsEnable-property is also False
If a user press the button the boolean should be set to true and the other controls should get IsEnabled = True
If a user press the button again both the boolean value and the controls IsEnabled-property should be set to FalseMy thought was that I could solve this problem by using commands (or triggers) and then use a ValueConverter for the other controls IsEnabled-property, but I haven't got this to work.
Does anyone have an idea on how I can get the button to affect the boolean in the ViewModel to enable this behaviour?
解决方案You can handle this entirely in the xaml with a pair of triggers on the toggle button that each play a storyboard. Take a look:
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="WpfApplication1.Window1" x:Name="Window" Title="Window1" Width="200" Height="300"> <Window.Resources> <Storyboard x:Key="SB_DisableButtons"> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsEnabled)" Storyboard.TargetName="button"> <DiscreteBooleanKeyFrame KeyTime="0" Value="False"/> </BooleanAnimationUsingKeyFrames> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsEnabled)" Storyboard.TargetName="button1"> <DiscreteBooleanKeyFrame KeyTime="0" Value="False"/> </BooleanAnimationUsingKeyFrames> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsEnabled)" Storyboard.TargetName="button2"> <DiscreteBooleanKeyFrame KeyTime="0" Value="False"/> </BooleanAnimationUsingKeyFrames> </Storyboard> <Storyboard x:Key="SB_EnableButtons"> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsEnabled)" Storyboard.TargetName="button"> <DiscreteBooleanKeyFrame KeyTime="0" Value="True"/> </BooleanAnimationUsingKeyFrames> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsEnabled)" Storyboard.TargetName="button1"> <DiscreteBooleanKeyFrame KeyTime="0" Value="True"/> </BooleanAnimationUsingKeyFrames> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsEnabled)" Storyboard.TargetName="button2"> <DiscreteBooleanKeyFrame KeyTime="0" Value="True"/> </BooleanAnimationUsingKeyFrames> </Storyboard> </Window.Resources> <Window.Triggers> <EventTrigger RoutedEvent="ToggleButton.Checked" SourceName="toggleButton"> <BeginStoryboard x:Name="SB_EnableButtons_BeginStoryboard" Storyboard="{StaticResource SB_EnableButtons}"/> </EventTrigger> <EventTrigger RoutedEvent="ToggleButton.Unchecked" SourceName="toggleButton"> <BeginStoryboard x:Name="SB_DisableButtons_BeginStoryboard" Storyboard="{StaticResource SB_DisableButtons}"/> </EventTrigger> </Window.Triggers> <Grid> <StackPanel HorizontalAlignment="Left" Orientation="Vertical" VerticalAlignment="Top" Width="78.257"> <ToggleButton x:Name="toggleButton" Content="ToggleButton" d:LayoutOverrides="Width"/> <Button x:Name="button" Content="Button" IsEnabled="False"/> <Button x:Name="button1" Content="Button" IsEnabled="False"/> <Button x:Name="button2" Content="Button" IsEnabled="False"/> </StackPanel> </Grid> </Window>
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