UpdateSourceTrigger Enum
Definition
Important
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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 UpdateSourceTriggerPublic Enum UpdateSourceTrigger- Inheritance
-
UpdateSourceTrigger
- Attributes
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 |
| 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 |