Infragistics logo
메뉴
.NET and JavaScript UI Controls
Version

GetContext(Type,Boolean) Method

Returns an object of requested type that relates to the element or null.
Syntax
'Declaration
 
Public Overloads Overrides Function GetContext( _
   ByVal type As Type, _
   ByVal checkParentElementContexts As Boolean _
) As Object
public override object GetContext( 
   Type type,
   bool checkParentElementContexts
)

Parameters

type
The requested type or null to pick up default context object.
checkParentElementContexts
If true will walk up the parent chain looking for the context.

Return Value

An object of the requested type, or null if nothing could be found.
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.

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
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

See Also