BeginUpdate Method (RasterPictureBox)

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

Syntax

C#
Visual Basic
Objective-C
Java
C++

public virtual void BeginUpdate()

'Declaration
 
Public Overridable Sub BeginUpdate()

'Usage
 
Dim instance As RasterPictureBox
 
instance.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.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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

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 
}

Requirements

Target Platforms

Reference

RasterPictureBox Class
RasterPictureBox Members