PdfViewer.UpdateUI Event

Raised when changes occur which may affect the control’s UI.

Namespace: DevExpress.XtraPdfViewer

Assembly: DevExpress.XtraPdfViewer.v23.2.dll

NuGet Package: DevExpress.Win.PdfViewer

Declaration

C#

public event EventHandler UpdateUI

VB.NET

Public Event UpdateUI As EventHandler

Event Data

The UpdateUI event's data class is EventArgs.

Remarks

This event signalizes that Bar or Ribbon user interface of the PDF Viewer is updated to reflect changes in the control’s state. Certain commands may change their state from enabled to disabled, from visible to hidden and vice versa.

This event occurs:

• When the control gets focus or the focus is lost;
• When the current selection is changed;
• When the content of the control is changed;
• When its status (modified or read-only) is modified.