BeginUpdate Method

Summary

Prevents the control from drawing until the EndUpdate method is called.

Syntax

C++

public virtual void BeginUpdate()

  
Public Overridable Sub BeginUpdate()

public: 
virtual void BeginUpdate();

Remarks

When you want to disable repainting of the RasterPictureBox, call BeginUpdate. When you are ready to resume painting call EndUpdate.

Example

This sample zooms out on the image, keeping it centered. The resulting transform is displayed in the console.

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
 
public void RasterPictureBox_BeginUpdate(RasterPictureBox viewer) 
{ 
   viewer.BeginUpdate();  // suspend painting of the image  
   viewer.SizeMode = RasterPictureBoxSizeMode.CenterImage; 
   viewer.UseDpi = false; 
   viewer.EndUpdate(); // start painting of the image  
}

Imports Leadtools.WinForms 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.Drawing 
 
Public Sub RasterPictureBox_BeginUpdate(ByVal viewer As RasterPictureBox) 
   viewer.BeginUpdate() ' suspend painting of the image 
   viewer.SizeMode = RasterPictureBoxSizeMode.CenterImage 
   viewer.UseDpi = False 
   viewer.EndUpdate() ' start painting of the image 
End Sub