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I am currently working within a WPF user control (the root element of my XAML file is "UserControl"), which I know is being hosted inside a Window. How can I access a property of the Window using data binding?
Does anyone know why simply
<Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type Window}}" Path="..." /> does not work? The error message I get is:
System.Windows.Data Warning: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Window', AncestorLevel='1''.
Edit: I ended up using a variation on ArsenMkrt's approach, so have accepted his answer. However, I am still interested in finding out why FindAncestor does not "just work".
675
The 'RelativeSource' property of the Binding class is used to bind the data from an element by it's relationship to the source element. RelativeSource is also a markup extension of type RelativeSource.
<TextBox x:Name="DestinationTextBox" Text="{Binding ElementName=SourceTextBox, Path=Text, Mode=OneWayToSource, UpdateSourceTrigger=PropertyChanged}" Margin="{StaticResource MarginTop}" Width="150"
Advertisements. Data binding is a mechanism in XAML applications that provides a simple and easy way for Windows Runtime Apps using partial classes to display and interact with data. The management of data is entirely separated from the way the data is displayed in this mechanism.
Data binding is a mechanism in WPF applications that provides a simple and easy way for Windows Runtime apps to display and interact with data. In this mechanism, the management of data is entirely separated from the way data. Data binding allows the flow of data between UI elements and data object on user interface.
The best way is to give a name to UserControl
Create dependency property MyProperty in UserControl with two way binding and bind it in main Window, than bind in UserControl like this
<UserControl x:Name = "myControl"> <Label Content={Binding ElementName= myControl, Path=MyProperty}/> </UserControl> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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