点击按钮时显示按钮内容
本文关键字:按钮 显示 | 更新日期: 2023-09-27 18:18:41
<Button Name="Dog" Content="Dog"
Height="80" FontSize="17"
Width="{Binding RelativeSource={RelativeSource Self},Path=Height}"
Click="Dog_Click"/>
我的问题是:怎么做??正常情况下,按钮内容是隐藏的,当我点击按钮的内容"狗"可见。由于
这是纯xaml解决方案,没有任何代码涉及这里的图片将是可见的,而按下按钮。
<Window x:Class="TriggeredButtonVisibility.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:triggeredButtonVisibility="clr-namespace:TriggeredButtonVisibility"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<Style x:Key="ButtonStyleKey" TargetType="Button">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Grid>
<TextBlock x:Name="ButtonContentTextBlock" Text="Press Me"
HorizontalAlignment="Center"
VerticalAlignment="Center"></TextBlock>
<Image x:Name="ButtonContentPicture"
Source="Resources/Pic.jpg"
Stretch="Fill" Visibility="Collapsed"
Margin="50" IsHitTestVisible="False"/>
</Grid>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Button}}, Path=IsPressed}" Value="True">
<Setter TargetName="ButtonContentTextBlock" Property="Visibility" Value="Collapsed" />
<Setter TargetName="ButtonContentPicture" Property="Visibility" Value="Visible" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid>
<Button Style="{StaticResource ButtonStyleKey}">Press Me</Button>
</Grid></Window>
如果你想将一些DataTemplate内部控件属性绑定到父(按钮)数据上下文,可以使用RelativeSource绑定。例如:{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Button}}, Path=DataContext.DataContextData}
.
视图模型所涉及的MVVM方法的图像可见性在视图模型级别进行管理。
1. Xaml:
<Window x:Class="TriggeredButtonVisibility.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:triggeredButtonVisibility="clr-namespace:TriggeredButtonVisibility"
Title="MainWindow" Height="350" Width="525">
<Window.DataContext>
<triggeredButtonVisibility:ButtonLogicViewmodel></triggeredButtonVisibility:ButtonLogicViewmodel>
</Window.DataContext>
<Window.Resources>
<Style x:Key="ButtonStyleKey" TargetType="Button">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate DataType="{x:Type triggeredButtonVisibility:ButtonLogicViewmodel}">
<Grid>
<TextBlock x:Name="ButtonContentTextBlock" Text="Press Me"
HorizontalAlignment="Center"
VerticalAlignment="Center"></TextBlock>
<Image x:Name="ButtonContentPicture"
Source="Resources/Pic.jpg"
Stretch="Fill" Visibility="Collapsed"
Margin="50" IsHitTestVisible="False"/>
</Grid>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding WasPressedAtOnse, UpdateSourceTrigger=PropertyChanged}" Value="True">
<Setter TargetName="ButtonContentTextBlock" Property="Visibility" Value="Collapsed" />
<Setter TargetName="ButtonContentPicture" Property="Visibility" Value="Visible" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid>
<Button Style="{StaticResource ButtonStyleKey}" Command="{Binding PressCommand}" Content="{Binding }"/></Grid></Window>
2。ViewModel代码:
public class ButtonLogicViewmodel:BaseObservableObject
{
private bool _wasPressedAtOnse;
private ICommand _pressCommand;
public ButtonLogicViewmodel()
{
WasPressedAtOnse = false;
}
public ICommand PressCommand
{
get { return _pressCommand ?? (_pressCommand = new RelayCommand(OnPress)); }
}
private void OnPress()
{
WasPressedAtOnse = !WasPressedAtOnse;
}
public bool WasPressedAtOnse
{
get { return _wasPressedAtOnse; }
set
{
_wasPressedAtOnse = value;
OnPropertyChanged();
}
}}
认为,
您可以为Button设置一个子控件,如:
<Button Name="Dog">
<Button.Content>
<!--Add a Grid here or whatever and bind Visibility={Binding Path=..., Mode="TwoWay", UpdateSourceTrigger="PropertyChanged"}-->
</Button.Content>
</Button>
在您的Dog_Click事件中,只需将可见性设置为Visibility. visible。不要忘记将默认设置为可见性。隐藏的