PdfViewerControl.FormFieldValueChanging Event
In This Article
Occurs when an end-user starts to edit an interactive form field value.
Namespace: DevExpress.Xpf.PdfViewer
Assembly: DevExpress.Xpf.PdfViewer.v24.2.dll
NuGet Package: DevExpress.Wpf.PdfViewer
#Declaration
public event FormFieldValueChangingEventHandler FormFieldValueChanging
#Event Data
The FormFieldValueChanging event's data class is FormFieldValueChangingEventArgs. The following properties provide information specific to this event:
Property | Description |
---|---|
Cancel | Specifies a value indicating whether to cancel changing the form field value. |
Field |
Gets the name of the form field. |
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 Routed |
New |
Gets or sets a new value of the form field. |
Old |
Gets the form field’s previous value. |
Original |
Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class.
Inherited from Routed |
Routed |
Gets or sets the Routed |
Source |
Gets or sets a reference to the object that raised the event.
Inherited from Routed |
The event data class exposes the following methods:
Method | Description |
---|---|
Invoke |
When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation.
Inherited from Routed |
On |
When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.
Inherited from Routed |
See Also