我正在寻找一种方法来为不同的ListViewItem启动不同的Flyout,具体取决于变量Type
的值,目前转换器无法正常工作。
我们说我有1个转换器,2个Flayouts和1个DataTemplate。
<Page.Resources>
<common:TypeToFlyoutTypeConverter x:Key="typeToFlyoutConverter"/>
<Flyout x:Name="FlyoutTemplateConfirmed">
<Grid >
<TextBlock Text="Confirmed"/>
</Grid>
</Flyout>
<Flyout x:Name="FlyoutTemplateRejected">
<Grid >
<TextBlock Text="Rejected"/>
</Grid>
</Flyout>
<DataTemplate x:Key="ListViewItemTemplate">
<Grid Tapped="Grid_Tapped"
FlyoutBase.AttachedFlyout="{Binding Type, Converter={StaticResource typeToFlyoutConverter}}">
</Grid>
</DataTemplate>
</Page.Resources>
转换器:
public class TypeToFlyoutTypeConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, string language)
{
if ((value as String).Contains("TypeConfirmed"))
return "StaticResource FlyoutTemplateConfirmed";
else
return "StaticResource FlyoutTemplateRejected";
}
public object ConvertBack(object value, Type targetType, object parameter, string language)
{
throw new NotSupportedException();
}
}
ListView:
<ListView
SelectionMode="None" IsItemClickEnabled="True" IsSwipeEnabled="false"
ItemTemplate="{StaticResource ListViewItemTemplate}"
ItemsSource="{Binding}">
</ListView>
Grid_Tapped
事件处理程序:
private void Grid_Tapped(object sender, TappedRoutedEventArgs e)
{
FrameworkElement element = sender as FrameworkElement;
if (element != null)
{
FlyoutBase.ShowAttachedFlyout(sender as FrameworkElement);
}
}
是否可以根据Type
?
谢谢!
答案 0 :(得分:0)
你可以使用基于类型
的多态来做到这一点public object ShowAttachedFlyout(FrameworkElement t)
{
}
public object ShowAttachedFlyout( OtherspecificTYpe o)
{
}
然后用动态
调用它FlyoutBase.ShowAttachedFlyout((dynamic)sender);
答案 1 :(得分:0)
在stackoverflow上闲逛几个小时后,我从here得到了很好的解决方法:
我没有使用转换器,而是定义要附加哪个弹出按钮并在Grid_Tapped
上以编程方式显示:
private void Grid_Tapped(object sender, TappedRoutedEventArgs e)
{
string itemType = ((sender as Grid).DataContext as blabla).Type;
if (itemType.Contains("blibli") && (sender as FrameworkElement) != null)
FlyoutBase.SetAttachedFlyout(sender as FrameworkElement, (Flyout)this.Resources["FlyoutTemplateConfirmed"]);
else if ((sender as FrameworkElement) != null)
FlyoutBase.SetAttachedFlyout(sender as FrameworkElement, (Flyout)this.Resources["FlyoutTemplateRejected"]);
FlyoutBase.ShowAttachedFlyout(sender as FrameworkElement);
}