GetAncestor Method

Walks up the parent chain until it reaches the parent of the requested type. Also, if this element is of the passed in type then this elemnt will be returned.

Syntax

Visual Basic

'Declaration
 
Public Function GetAncestor( _
   ByVal type As Type _
) As UIElement

C#

public UIElement GetAncestor( 
   Type type
)

Parameters

type

The System.Type to look for.

Return Value

UIElement that matches the requested type.

Example

This sample uses GetAncestor to determine if we have clicked a RowUIElement on an UltraWinGrid, then uses GetContext to get at the RowUIElements associated row.

Visual Basic

Imports Infragistics.Win
Imports System.Drawing
Imports System.Diagnostics

Public Function GetRowCellCount(ByVal pt As Point) As Integer
      
       ' Determine if we clicked on a row, first get the element under the mouse.
       Dim elementUnderMouse As UIElement

		elementUnderMouse = Me.UltraGrid1.DisplayLayout.UIElement.ElementFromPoint(pt)

       If Not elementUnderMouse Is Nothing Then
           Dim elementRow As UIElement 

				elementRow = elementUnderMouse.GetAncestor(GetType(UltraWinGrid.RowUIElement))
           If Not elementRow Is Nothing Then

               ' You now have the row element to do with as you please.
               ' Get the count of the cells collection
               Dim row As UltraWinGrid.UltraGridRow = elementRow.GetContext(GetType(UltraWinGrid.UltraGridRow))
               If Not row Is Nothing Then
                   Debug.WriteLine(row.Cells.Count.ToString())
                   Return row.Cells.Count
               End If
           End If
       End If

       Return 0

   End Function

C#

using Infragistics.Win;
using System.Drawing;
using System.Diagnostics;

private int GetRowCellCount(Point pt)
{
	// Determine if we clicked on a row
	UIElement elementUnderMouse = this.ultraGrid1.DisplayLayout.UIElement.ElementFromPoint(pt);

	if (null != elementUnderMouse)
	{
		UIElement elementRow = elementUnderMouse.GetAncestor(typeof(UltraWinGrid.RowUIElement ));

		if (null != elementRow)
		{
			// You now have the row element to do with as you please.
			// Get the count of the cells collection
			UltraWinGrid.UltraGridRow row = elementRow.GetContext(typeof(UltraWinGrid.UltraGridRow)) as UltraWinGrid.UltraGridRow ;

			if (null != row)
			{
				Debug.WriteLine(row.Cells.Count.ToString());
				return row.Cells.Count;
			}
		}
	}

	return 0;

}

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