UpdateSourceTrigger UpdateSourceTrigger UpdateSourceTrigger Enum
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Prerelease. Defines constants that indicate when a binding source is updated by its binding target in two-way binding.
public : enum class UpdateSourceTrigger
public enum UpdateSourceTrigger
Public Enum UpdateSourceTrigger
Windows 10 (introduced v10.0.10240.0)
Windows.Foundation.UniversalApiContract (introduced v1)
The default UpdateSourceTrigger value is Default rather than PropertyChanged for legacy reasons. Previous XAML frameworks enabled a way to register a dependency property with a value that influenced what its default binding update behavior does. That dependency property behavior isn't implemented in the Windows Runtime.
|Default Default Default||
Use default behavior from the dependency property that uses the binding. In Windows Runtime, this evaluates the same as a value with PropertyChanged.
|Explicit Explicit Explicit||
The binding source is updated only when you call the BindingExpression.UpdateSource method.
|PropertyChanged PropertyChanged PropertyChanged||
The binding source is updated whenever the binding target value changes. This is detected automatically by the binding system.