UpdateSourceTrigger Enum

Definition

Namespace:

Windows.UI.Xaml.Data

Defines constants that indicate when a binding source is updated by its binding target in two-way binding.

public enum class UpdateSourceTrigger

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
enum class UpdateSourceTrigger

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
public enum UpdateSourceTrigger

Public Enum UpdateSourceTrigger

Inheritance

Enum

UpdateSourceTrigger

Attributes

ContractVersionAttribute

Windows requirements

Device family	Windows 10 (introduced in 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v1.0)

Fields

Default	0	Use default behavior from the dependency property that uses the binding.
Explicit	2	The binding source is updated only when you call the BindingExpression.UpdateSource method. (Not supported for x:Bind.)
LostFocus	3	The binding source is updated whenever the binding target element loses focus.
PropertyChanged	1	The binding source is updated whenever the binding target value changes. This is detected automatically by the binding system.

Remarks

Note

The default UpdateSourceTrigger value is Default rather than PropertyChanged for legacy reasons. This evaluates as a PropertyChanged update behavior for most dependency properties, but evaluates as LostFocus for the TextBox.Text property.

Version history

Windows version	SDK version	Value added
1709	16299	LostFocus