Is it possible to bind the same property of the control more than once?
To example:
<Popup IsOpen="{Binding Path=(local:ListViewBehavior.IsColumnHeaderClicked),
RelativeSource={RelativeSource FindAncestor, AncestorType=GridViewColumnHeader}}" ...
As you can see Popup.IsOpen
is bound to attached property. I'd like to bind it to ViewModel IsPopupOpened
, but have no idea how.
Trying @Arhiman answer without much success:
<Popup.IsOpen>
<MultiBinding Converter="{local:MultiBindingConverter}">
<Binding Path="(local:ListViewBehavior.IsColumnHeaderClicked)"
RelativeSource="{RelativeSource FindAncestor, AncestorType=GridViewColumnHeader}" />
<Binding Path="DataContext.IsPopupId"
RelativeSource="{RelativeSource FindAncestor, AncestorType=UserControl}" />
</MultiBinding>
</Popup.IsOpen>
Naive converter logic:
public class MultiBindingConverter : MarkupExtension, IMultiValueConverter
{
public MultiBindingConverter() { }
public override object ProvideValue(IServiceProvider serviceProvider) => this;
object[] _old;
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
if (_old == null)
_old = values.ToArray();
// check if one of values is changed - that change is a new value
for (int i = 0; i < values.Length; i++)
if (values[i] != _old[i])
{
_old = values.ToArray();
return values[i];
}
return values[0];
}
// replicate current value
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) =>
Enumerable.Repeat(value, targetTypes.Length).ToArray();
}