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OnSelectedIndexChanged Method

Summary

Raises the SelectedIndexChanged event.

Syntax

C#
VB
C++
protected virtual void OnSelectedIndexChanged( 
   EventArgs e 
) 
  
Protected Overridable Sub OnSelectedIndexChanged( _ 
   ByVal e As EventArgs _ 
)  
protected: 
virtual void OnSelectedIndexChanged(  
   EventArgs^ e 
)

Parameters

e
An System.EventArgs that contains the event data.

Remarks

Raising an event invokes the event handler through a delegate.

The OnSelectedIndexChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors: When overriding OnSelectedIndexChanged in a derived class, be sure to call the base class's OnSelectedIndexChanged method so that registered delegates receive the event.

Example

This example overrides the virtual events of the RasterImageList class.

C#
VB
using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
 
public class MyRasterImageList : RasterImageList 
{ 
   //. 
   //. 
   //. 
 
   protected override void OnAutoDeselectItemsChanged(EventArgs e) 
   { 
      base.OnAutoDeselectItemsChanged(e); 
      Console.WriteLine("OnAutoDeselectItemsChanged is called"); 
   } 
 
   protected override void OnAutoDisposeImagesChanged(EventArgs e) 
   { 
      base.OnAutoDisposeImagesChanged(e); 
      Console.WriteLine("OnAutoDisposeImagesChanged is called"); 
   } 
 
   protected override void OnBorderStyleChanged(EventArgs e) 
   { 
      base.OnBorderStyleChanged(e); 
      Console.WriteLine("OnBorderStyleChanged is called"); 
   } 
 
   protected override void OnDoubleBufferChanged(EventArgs e) 
   { 
      base.OnDoubleBufferChanged(e); 
      Console.WriteLine("OnDoubleBufferChanged is called"); 
   } 
 
   protected override void OnDrawItem(RasterImageListDrawItemEventArgs e) 
   { 
      base.OnDrawItem(e); 
      Console.WriteLine("OnDrawItem is called"); 
   } 
 
   protected override void OnEnableKeyboardChanged(EventArgs e) 
   { 
      base.OnEnableKeyboardChanged(e); 
      Console.WriteLine("OnEnableKeyboardChanged is called"); 
   } 
 
   protected override void OnEnableRubberBandSelectionChanged(EventArgs e) 
   { 
      base.OnEnableRubberBandSelectionChanged(e); 
      Console.WriteLine("OnEnableRubberBandSelectionChanged is called"); 
   } 
 
   protected override void OnItemBackColorChanged(EventArgs e) 
   { 
      base.OnItemBackColorChanged(e); 
      Console.WriteLine("OnItemBackColorChanged is called"); 
   } 
 
   protected override void OnItemBorderStyleChanged(EventArgs e) 
   { 
      base.OnItemBorderStyleChanged(e); 
      Console.WriteLine("OnItemBorderStyleChanged is called"); 
   } 
 
   protected override void OnItemForeColorChanged(EventArgs e) 
   { 
      base.OnItemForeColorChanged(e); 
      Console.WriteLine("OnItemForeColorChanged is called"); 
   } 
 
   protected override void OnItemImageBorderStyleChanged(EventArgs e) 
   { 
      base.OnItemImageBorderStyleChanged(e); 
      Console.WriteLine("OnItemImageBorderStyleChanged is called"); 
   } 
 
   protected override void OnItemImageSizeChanged(EventArgs e) 
   { 
      base.OnItemImageSizeChanged(e); 
      Console.WriteLine("OnItemImageSizeChanged is called"); 
   } 
 
   protected override void OnItemSelectedBackColorChanged(EventArgs e) 
   { 
      base.OnItemSelectedBackColorChanged(e); 
      Console.WriteLine("OnItemSelectedBackColorChanged is called"); 
   } 
 
   protected override void OnItemSelectedForeColorChanged(EventArgs e) 
   { 
      base.OnItemSelectedForeColorChanged(e); 
      Console.WriteLine("OnItemSelectedForeColorChanged is called"); 
   } 
 
   protected override void OnItemSizeChanged(EventArgs e) 
   { 
      base.OnItemSizeChanged(e); 
      Console.WriteLine("OnItemSizeChanged is called"); 
   } 
 
   protected override void OnItemSpacingSizeChanged(EventArgs e) 
   { 
      base.OnItemSpacingSizeChanged(e); 
      Console.WriteLine("OnItemSpacingSizeChanged is called"); 
   } 
 
   protected override void OnKeyDown(KeyEventArgs e) 
   { 
      base.OnKeyDown(e); 
      Console.WriteLine("OnKeyDown is called"); 
   } 
 
   protected override void OnLostFocus(EventArgs e) 
   { 
      base.OnLostFocus(e); 
      Console.WriteLine("OnLostFocus is called"); 
   } 
 
   protected override void OnMouseDown(MouseEventArgs e) 
   { 
      base.OnMouseDown(e); 
      Console.WriteLine("OnMouseDown is called"); 
   } 
 
   protected override void OnMouseMove(MouseEventArgs e) 
   { 
      base.OnMouseMove(e); 
      Console.WriteLine("OnMouseMove is called"); 
   } 
 
   protected override void OnMouseUp(MouseEventArgs e) 
   { 
      base.OnMouseUp(e); 
      Console.WriteLine("OnMouseUp is called"); 
   } 
 
   protected override void OnPaint(PaintEventArgs e) 
   { 
      base.OnPaint(e); 
      Console.WriteLine("OnPaint is called"); 
   } 
 
   protected override void OnPaintPropertiesChanged(EventArgs e) 
   { 
      base.OnPaintPropertiesChanged(e); 
      Console.WriteLine("OnPaintPropertiesChanged is called"); 
   } 
 
   protected override void OnScroll(EventArgs e) 
   { 
      base.OnScroll(e); 
      Console.WriteLine("OnScroll is called"); 
   } 
 
   protected override void OnScrollStyleChanged(EventArgs e) 
   { 
      base.OnScrollStyleChanged(e); 
      Console.WriteLine("OnScrollStyleChanged is called"); 
   } 
 
   protected override void OnSelectedIndexChanged(EventArgs e) 
   { 
      base.OnSelectedIndexChanged(e); 
      Console.WriteLine("OnSelectedIndexChanged is called"); 
   } 
 
   protected override void OnSelectionModeChanged(EventArgs e) 
   { 
      base.OnSelectionModeChanged(e); 
      Console.WriteLine("OnSelectionModeChanged is called"); 
   } 
 
   protected override void OnSelectUserImageChanged(EventArgs e) 
   { 
      base.OnSelectUserImageChanged(e); 
      Console.WriteLine("OnSelectUserImageChanged is called"); 
   } 
 
   protected override void OnShowItemTextChanged(EventArgs e) 
   { 
      base.OnShowItemTextChanged(e); 
      Console.WriteLine("OnShowItemTextChanged is called"); 
   } 
 
   protected override void OnSizeChanged(EventArgs e) 
   { 
      base.OnSizeChanged(e); 
      Console.WriteLine("OnSizeChanged is called"); 
   } 
 
   protected override void OnSorterChanged(EventArgs e) 
   { 
      base.OnSorterChanged(e); 
      Console.WriteLine("OnSorterChanged is called"); 
   } 
 
   protected override void OnSortingChanged(EventArgs e) 
   { 
      base.OnSortingChanged(e); 
      Console.WriteLine("OnSortingChanged is called"); 
   } 
 
   protected override void OnViewStyleChanged(EventArgs e) 
   { 
      base.OnViewStyleChanged(e); 
      Console.WriteLine("OnViewStyleChanged is called"); 
   } 
} 
Imports Leadtools.WinForms 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.Drawing 
 
Public Class MyRasterImageList 
   Inherits RasterImageList 
   '. 
   '. 
   '. 
 
   Protected Overrides Sub OnAutoDeselectItemsChanged(ByVal e As EventArgs) 
      MyBase.OnAutoDeselectItemsChanged(e) 
      Console.WriteLine("OnAutoDeselectItemsChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnAutoDisposeImagesChanged(ByVal e As EventArgs) 
      MyBase.OnAutoDisposeImagesChanged(e) 
      Console.WriteLine("OnAutoDisposeImagesChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnBorderStyleChanged(ByVal e As EventArgs) 
      MyBase.OnBorderStyleChanged(e) 
      Console.WriteLine("OnBorderStyleChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnDoubleBufferChanged(ByVal e As EventArgs) 
      MyBase.OnDoubleBufferChanged(e) 
      Console.WriteLine("OnDoubleBufferChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnDrawItem(ByVal e As RasterImageListDrawItemEventArgs) 
      MyBase.OnDrawItem(e) 
      Console.WriteLine("OnDrawItem is called") 
   End Sub 
 
   Protected Overrides Sub OnEnableKeyboardChanged(ByVal e As EventArgs) 
      MyBase.OnEnableKeyboardChanged(e) 
      Console.WriteLine("OnEnableKeyboardChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnEnableRubberBandSelectionChanged(ByVal e As EventArgs) 
      MyBase.OnEnableRubberBandSelectionChanged(e) 
      Console.WriteLine("OnEnableRubberBandSelectionChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemBackColorChanged(ByVal e As EventArgs) 
      MyBase.OnItemBackColorChanged(e) 
      Console.WriteLine("OnItemBackColorChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemBorderStyleChanged(ByVal e As EventArgs) 
      MyBase.OnItemBorderStyleChanged(e) 
      Console.WriteLine("OnItemBorderStyleChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemForeColorChanged(ByVal e As EventArgs) 
      MyBase.OnItemForeColorChanged(e) 
      Console.WriteLine("OnItemForeColorChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemImageBorderStyleChanged(ByVal e As EventArgs) 
      MyBase.OnItemImageBorderStyleChanged(e) 
      Console.WriteLine("OnItemImageBorderStyleChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemImageSizeChanged(ByVal e As EventArgs) 
      MyBase.OnItemImageSizeChanged(e) 
      Console.WriteLine("OnItemImageSizeChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemSelectedBackColorChanged(ByVal e As EventArgs) 
      MyBase.OnItemSelectedBackColorChanged(e) 
      Console.WriteLine("OnItemSelectedBackColorChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemSelectedForeColorChanged(ByVal e As EventArgs) 
      MyBase.OnItemSelectedForeColorChanged(e) 
      Console.WriteLine("OnItemSelectedForeColorChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemSizeChanged(ByVal e As EventArgs) 
      MyBase.OnItemSizeChanged(e) 
      Console.WriteLine("OnItemSizeChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnItemSpacingSizeChanged(ByVal e As EventArgs) 
      MyBase.OnItemSpacingSizeChanged(e) 
      Console.WriteLine("OnItemSpacingSizeChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnKeyDown(ByVal e As KeyEventArgs) 
      MyBase.OnKeyDown(e) 
      Console.WriteLine("OnKeyDown is called") 
   End Sub 
 
   Protected Overrides Sub OnLostFocus(ByVal e As EventArgs) 
      MyBase.OnLostFocus(e) 
      Console.WriteLine("OnLostFocus is called") 
   End Sub 
 
   Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs) 
      MyBase.OnMouseDown(e) 
      Console.WriteLine("OnMouseDown is called") 
   End Sub 
 
   Protected Overrides Sub OnMouseMove(ByVal e As MouseEventArgs) 
      MyBase.OnMouseMove(e) 
      Console.WriteLine("OnMouseMove is called") 
   End Sub 
 
   Protected Overrides Sub OnMouseUp(ByVal e As MouseEventArgs) 
      MyBase.OnMouseUp(e) 
      Console.WriteLine("OnMouseUp is called") 
   End Sub 
 
   Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) 
      MyBase.OnPaint(e) 
      Console.WriteLine("OnPaint is called") 
   End Sub 
 
   Protected Overrides Sub OnPaintPropertiesChanged(ByVal e As EventArgs) 
      MyBase.OnPaintPropertiesChanged(e) 
      Console.WriteLine("OnPaintPropertiesChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnScroll(ByVal e As EventArgs) 
      MyBase.OnScroll(e) 
      Console.WriteLine("OnScroll is called") 
   End Sub 
 
   Protected Overrides Sub OnScrollStyleChanged(ByVal e As EventArgs) 
      MyBase.OnScrollStyleChanged(e) 
      Console.WriteLine("OnScrollStyleChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnSelectedIndexChanged(ByVal e As EventArgs) 
      MyBase.OnSelectedIndexChanged(e) 
      Console.WriteLine("OnSelectedIndexChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnSelectionModeChanged(ByVal e As EventArgs) 
      MyBase.OnSelectionModeChanged(e) 
      Console.WriteLine("OnSelectionModeChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnSelectUserImageChanged(ByVal e As EventArgs) 
      MyBase.OnSelectUserImageChanged(e) 
      Console.WriteLine("OnSelectUserImageChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnShowItemTextChanged(ByVal e As EventArgs) 
      MyBase.OnShowItemTextChanged(e) 
      Console.WriteLine("OnShowItemTextChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnSizeChanged(ByVal e As EventArgs) 
      MyBase.OnSizeChanged(e) 
      Console.WriteLine("OnSizeChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnSorterChanged(ByVal e As EventArgs) 
      MyBase.OnSorterChanged(e) 
      Console.WriteLine("OnSorterChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnSortingChanged(ByVal e As EventArgs) 
      MyBase.OnSortingChanged(e) 
      Console.WriteLine("OnSortingChanged is called") 
   End Sub 
 
   Protected Overrides Sub OnViewStyleChanged(ByVal e As EventArgs) 
      MyBase.OnViewStyleChanged(e) 
      Console.WriteLine("OnViewStyleChanged is called") 
   End Sub 
End Class

Requirements

Target Platforms

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