我想在WPF中实现某种行为。我四处寻找安静的时间,并决定对帮助进行排序。我要实现以下行为。
我有一个TextBlock
和一个ComboBox
彼此叠置。我希望在ComboBox
被聚焦时出现TextBlock
。同样,ComboBox
的作品完成后(例如,选择ComboBoxItem
)。我想回到我的旧视图(即顶部的TextBlock
)。任何人都可以展示这种行为的示例,或者只是指导我一些事情。
我有一个ZIndex方法,如下所示。
<Grid>
<Button Name="Button1" Canvas.ZIndex="4" Content="Button1" Canvas.Top="100" Width="163" Height="58" FontSize="26" Click="Button1_Click" />
<Button Name="Button2" Canvas.ZIndex="3" Content="Button2" Canvas.Top="100" Canvas.Left="130" Width="163" Height="58" FontSize="26" Click="Button2_Click" />
</Grid>
以及背后的代码
private void Button1_Click(object sender, RoutedEventArgs e)
{
Canvas.SetZIndex(sender as UIElement, 1);
}
private void Button2_Click(object sender, RoutedEventArgs e)
{
Canvas.SetZIndex(sender as UIElement, 0);
}
答案 0 :(得分:1)
不确定我是否正确地理解了您的需求,但这就是我想您想要的:
XAML:
<Grid Width="50">
<ComboBox x:Name="cb" SelectedIndex="0" ItemsSource="{Binding MyObservableCollection}"/>
<TextBox x:Name="tb" Text="{Binding ElementName=cb,Path=SelectedItem}">
<TextBox.Style>
<Style TargetType="TextBox">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=tb, Path=IsFocused}" Value="true">
<Setter Property="Visibility" Value="Hidden"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
</Grid>
DataContext:
private ObservableCollection<string> myObservableCollection = new ObservableCollection<string>{ "one", "two", "tree" };
public ObservableCollection<string> MyObservableCollection
{
get => this.myObservableCollection;
set => SetField(ref this.myObservableCollection, value);
}