Infragistics(R) NetAdvantage(R) Windows Forms
BeforeColRegionRemovedEventHandler Delegate
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Infragistics.Win.UltraWinGrid Namespace : BeforeColRegionRemovedEventHandler Delegate

sender
e
delegate for handling event that is fired before a col scroll region is removed

Syntax

Visual Basic (Declaration) 
Public Delegate Sub BeforeColRegionRemovedEventHandler( _
   ByVal sender As Object, _
   ByVal e As BeforeColRegionRemovedEventArgs _
) 
C# 
public delegate void BeforeColRegionRemovedEventHandler( 
   object sender,
   BeforeColRegionRemovedEventArgs e
)

Parameters

sender
e

Example

Following code splits the ultraGrid1 into four different scroll regions and shows how one can use BeforeRowRegionRemoved and BeforeColRegionRemoved events to prevent the user from removing the regions.

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
Imports System.Diagnostics

   Private Sub Button5_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button5.Click

       ' Following code sets up the ultraGrid1 with 2 colum-scroll-regions and two
       ' row-scroll-regions and thus having a total of 4 row-col-intersection regions.

       ' Split the column-scroll-region and the row-scroll-region each.
       Me.ultraGrid1.DisplayLayout.ColScrollRegions(0).Split()
       Me.ultraGrid1.DisplayLayout.RowScrollRegions(0).Split()

   End Sub

   Private Sub UltraGrid1_BeforeColRegionRemoved(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.BeforeColRegionRemovedEventArgs) Handles ultraGrid1.BeforeColRegionRemoved

       Debug.WriteLine("ColScrollRegion with index of " & e.ColScrollRegion.Index & " is being removed. Canceling it.")

       ' Set Cancel to true to prevent the user from removing a colum scroll region.
       e.Cancel = True

   End Sub

   Private Sub UltraGrid1_BeforeRowRegionRemoved(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.BeforeRowRegionRemovedEventArgs) Handles ultraGrid1.BeforeRowRegionRemoved

       Debug.WriteLine("RowScrollRegion with index of " & e.RowScrollRegion.Index & " is being removed. Canceling it.")

       ' Set Cancel to true to prevent the user from removing a row scroll region.
       e.Cancel = True

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

private void button5_Click(object sender, System.EventArgs e)
{

	// Following code sets up the ultraGrid1 with 2 colum-scroll-regions and two
	// row-scroll-regions and thus having a total of 4 row-col-intersection regions.

	// Split the column-scroll-region and the row-scroll-region each.
	this.ultraGrid1.DisplayLayout.ColScrollRegions[0].Split( );
	this.ultraGrid1.DisplayLayout.RowScrollRegions[0].Split( );

}

private void ultraGrid1_BeforeColRegionRemoved(object sender, Infragistics.Win.UltraWinGrid.BeforeColRegionRemovedEventArgs e)
{

	Debug.WriteLine( "ColScrollRegion with index of " + e.ColScrollRegion.Index + " is being removed. Canceling it." );

	// Set Cancel to true to prevent the user from removing a colum scroll region.
	e.Cancel = true;

}

private void ultraGrid1_BeforeRowRegionRemoved(object sender, Infragistics.Win.UltraWinGrid.BeforeRowRegionRemovedEventArgs e)
{

	Debug.WriteLine( "RowScrollRegion with index of " + e.RowScrollRegion.Index + " is being removed. Canceling it." );

	// Set Cancel to true to prevent the user from removing a row scroll region.
	e.Cancel = true;

}

See Also