Infragistics logo
메뉴
.NET and JavaScript UI Controls
Version

ColumnHeaders Property (BeforeColPosChangedEventArgs)

The selected columns (read-only)
Syntax
'Declaration
 
Public ReadOnly Property ColumnHeaders As ColumnHeader()
public ColumnHeader[] ColumnHeaders {get;}
Example
Following code shows some of the information available in BeforeColPosChanged event.

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.

Imports Infragistics.Shared
Imports Infragistics.Win
Imports Infragistics.Win.UltraWinGrid
Imports System.Diagnostics

   Private Sub UltraGrid1_BeforeColPosChanged(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.BeforeColPosChangedEventArgs) Handles ultraGrid1.BeforeColPosChanged

       ' BeforeColPosChanged gets fired when the user moves, swaps or resizes a column
       ' or columns. This event gives a chance to cancel the user action.

       If PosChanged.Moved = e.PosChanged Then

           ' One or more columns are being moved

           Dim columnList As String = ""

           Dim i As Integer
           For i = 0 To e.ColumnHeaders.Length - 1
               If i > 0 Then columnList = columnList & ", "

               columnList = columnList + e.ColumnHeaders(i).Column.Key
           Next

           Dim result As DialogResult = MessageBox.Show( _
               "You are about to move " & columnList & " columns. Do you want to continue ?", _
               "Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question)

           If DialogResult.No = result Then
               ' Cancel the move by setting Cancel off the event args.
               e.Cancel = True
           End If

       ElseIf PosChanged.Swapped = e.PosChanged Then

           ' Two columns are being swapped.

           Dim result As DialogResult = MessageBox.Show( _
               "You are about to swap " & e.ColumnHeaders(0).Column.Key & " with " _
               + e.ColumnHeaders(1).Column.Key & " Do you want to continue ?", _
               "Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question)

           If DialogResult.No = result Then
               ' Cancel the move by setting Cancel off the event args.
               e.Cancel = True
           End If

       ElseIf PosChanged.Sized = e.PosChanged Then

           ' A column is bieng resized.

           ' When a column is being resized, e.ColumnHeaders contains the column header that's
           ' being resized.
           Debug.WriteLine("User is about to resize " & e.ColumnHeaders(0).Column.Key & " colun.")

       End If

   End Sub
using Infragistics.Shared;
using Infragistics.Win;
using Infragistics.Win.UltraWinGrid;
using System.Diagnostics;

private void ultraGrid1_BeforeColPosChanged(object sender, Infragistics.Win.UltraWinGrid.BeforeColPosChangedEventArgs e)
{

	// BeforeColPosChanged gets fired when the user moves, swaps or resizes a column
	// or columns. This event gives a chance to cancel the user action.

	if ( PosChanged.Moved == e.PosChanged )
	{
		// One or more columns are being moved

		string columnList = "";
		
		for ( int i = 0; i < e.ColumnHeaders.Length; i++ )
		{
			if ( i > 0 )
				columnList = columnList + ", ";

			columnList = columnList + e.ColumnHeaders[i].Column.Key;
		}

		DialogResult result = MessageBox.Show( 
			"You are about to move " + columnList + " columns. Do you want to continue ?",
			"Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question );

		if ( DialogResult.No == result )
		{
			// Cancel the move by setting Cancel off the event args.
			e.Cancel = true;
		}
	}
	else if ( PosChanged.Swapped == e.PosChanged )
	{
		// Two columns are being swapped.

		DialogResult result = MessageBox.Show( 
			"You are about to swap " + e.ColumnHeaders[0].Column.Key + " with " 
					+ e.ColumnHeaders[1].Column.Key + " Do you want to continue ?", 
			"Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question );

		if ( DialogResult.No == result )
		{
			// Cancel the move by setting Cancel off the event args.
			e.Cancel = true;
		}
	}
	else if ( PosChanged.Sized == e.PosChanged )
	{
		// A column is bieng resized.

		// When a column is being resized, e.ColumnHeaders contains the column header that's
		// being resized.
		Debug.WriteLine( "User is about to resize " + e.ColumnHeaders[0].Column.Key + " colun." );
	}

}
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also