 |
 |
Infragistics2.Win.v7.2 |
| Infragistics.Win Namespace > UIElement Class : GetAncestor Method |
|
|
Infragistics2.Win.v7.2 |
| Infragistics.Win Namespace > UIElement Class : 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.
UIElement that matches the requested type.
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;
}