Infragistics(R) NetAdvantage(R) Windows Forms
BeforeColRegionSplitEventArgs Class
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Infragistics.Win.UltraWinGrid Namespace : BeforeColRegionSplitEventArgs Class

Event parameters used for the BeforeColRegionSplit event

Syntax

Visual Basic (Declaration) 
Public Class BeforeColRegionSplitEventArgs 
   Inherits System.ComponentModel.CancelEventArgs
C# 
public class BeforeColRegionSplitEventArgs : System.ComponentModel.CancelEventArgs 

Example

Following code illustrates how you can use combination of BeforeColRegionSplit and BeforeColRegionSize events to prevent the user from resizing any of the column scroll regions too small.

For an overview of how to handle events in Visual Basic or Visual C#, see Event Handlers in Visual Basic and Visual C#. For specific information and code examples illustrating how to consume events in your application, see Consuming Events in the .NET Framework Developer's Guide.

Visual BasicCopy Code
Imports Infragistics.Shared
Imports Infragistics.Win
Imports Infragistics.Win.UltraWinGrid

  Private Sub UltraGrid1_BeforeColRegionSplit(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.BeforeColRegionSplitEventArgs) Handles ultraGrid1.BeforeColRegionSplit

      ' If the new scroll region is smaller than 100 pixels, then cancel the event
      ' so the UltraGrid doesn't proceed with the region split.
      If e.NewColScrollRegion.Width < 100 Then
          e.Cancel = True

          ' Also cancel if the column scroll region being split would end up being less
          ' than 100 pixels as a result of the split.
      ElseIf e.OriginalColScrollRegion.Width - e.NewColScrollRegion.Width < 100 Then
          e.Cancel = True
      End If

      If e.Cancel Then
          MessageBox.Show("You cannot split a column scroll region smaller than 100 pixels.")
      End If

  End Sub

  Private Sub UltraGrid1_BeforeColRegionSize(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.BeforeColRegionSizeEventArgs) Handles ultraGrid1.BeforeColRegionSize

      ' If the user resizes a scroll region in such a way so that any of the
      ' effected scroll regions ends up being less than 100, then cancel it.			
      If e.Region1.Width < 100 Or e.Region2.Width < 100 Then
          e.Cancel = True
          MessageBox.Show("You cannot resize a column scroll region smaller than 100 pixels.")
      End If

  End Sub
C#Copy Code
using Infragistics.Shared;
using Infragistics.Win;
using Infragistics.Win.UltraWinGrid;
using System.Diagnostics;

private void ultraGrid1_BeforeColRegionSplit(object sender, Infragistics.Win.UltraWinGrid.BeforeColRegionSplitEventArgs e)
{
	// If the new scroll region is smaller than 100 pixels, then cancel the event
	// so the UltraGrid doesn't proceed with the region split.
	if ( e.NewColScrollRegion.Width < 100 )
		e.Cancel = true;

	// Also cancel if the column scroll region being split would end up being less
	// than 100 pixels as a result of the split.
	else if ( e.OriginalColScrollRegion.Width - e.NewColScrollRegion.Width < 100 )
		e.Cancel = true;

	if ( e.Cancel )
	{
		MessageBox.Show( "You cannot split a column scroll region smaller than 100 pixels." );
	}
}

private void ultraGrid1_BeforeColRegionSize(object sender, Infragistics.Win.UltraWinGrid.BeforeColRegionSizeEventArgs e)
{
	// If the user resizes a scroll region in such a way so that any of the
	// effected scroll regions ends up being less than 100, then cancel it.			
	if ( e.Region1.Width < 100 || e.Region2.Width < 100 )
	{
		e.Cancel = true;

		MessageBox.Show( "You cannot resize a column scroll region smaller than 100 pixels." );
	}
}

See Also