BaseEdit.EditValueChanging Event

Occurs before the editor's value is changed.

Namespace: DevExpress.Xpf.Editors

Assembly: DevExpress.Xpf.Core.v14.2.dll

Declaration

C#

public event EditValueChangingEventHandler EditValueChanging

VB.NET

Public Event EditValueChanging As EditValueChangingEventHandler

Event Data

The EditValueChanging event's handler receives an argument of the EditValueChangingEventArgs type. The following properties provide information specific to this event:

Property	Description
Handled	Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
IsCancel	Gets or sets a value indicating whether the event should be canceled.
NewValue	Gets or sets a new value to be assigned to the editor.
OldValue	Gets or sets the current edit value, which should be replaced by the new value.
OriginalSource	Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent	Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Source	Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.

Remarks

The EditValueChanging event is raised when the editor's value is about to be changed (a user types or deletes a character, chooses a value from a dropdown list, etc.). The potential new value is returned by the event parameter's NewValue property. The current value is returned by the OldValue property. To cancel posting EditValueChangingEventArgs.NewValue to BaseEdit.EditValue, set the EditValueChangingEventArgs.IsCancel and Handled properties to true.

After the editor's value has been changed, the BaseEdit.EditValueChanged event is fired.