PdfViewer.FormFieldValueChanging Event

Occurs before changes are applied to a form field.

Namespace: DevExpress.Maui.Pdf

Assembly: DevExpress.Maui.Pdf.dll

NuGet Package: DevExpress.Maui.Pdf

Declaration

public event EventHandler<PdfFormFieldValueChangingEventArgs> FormFieldValueChanging

Event Data

The FormFieldValueChanging event's data class is PdfFormFieldValueChangingEventArgs. The following properties provide information specific to this event:

Property	Description
Cancel	Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs.
FieldName	Returns the field name.
NewValue	Gets the new value of a property. Inherited from ValueChangingEventArgs<T>.
OldValue	Gets the old value of a property. Inherited from ValueChangingEventArgs<T>.

Remarks

Set the e.Cancel property to true in the FormFieldValueChanging event handler to cancel value changes. In this case, the PDF viewer does not raise the FormFieldValueChanged event.