UpdateSourceTrigger Enum

Reference

Definition

Namespace:: Windows.UI.Xaml.Data

Important

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Edit

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

Name	Value	Description
Default	0	Use default behavior from the dependency property that uses the binding.
PropertyChanged	1	The binding source is updated whenever the binding target value changes. This is detected automatically by the binding system.
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.

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

Applies to

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