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BeforeCellExitEditMode Event

Occurs before an edit mode session ends for an UltraTreeNodeCell.
Syntax
'Declaration
 
Public Event BeforeCellExitEditMode As BeforeCellExitEditModeEventHandler
public event BeforeCellExitEditModeEventHandler BeforeCellExitEditMode
Event Data

The event handler receives an argument of type BeforeCellExitEditModeEventArgs containing data related to this event. The following BeforeCellExitEditModeEventArgs properties provide information specific to this event.

PropertyDescription
ApplyChanges Gets/sets whether changes made by the end user during the edit mode session are saved or discarded.
Cancel (Inherited from System.ComponentModel.CancelEventArgs) 
Cell (Inherited from Infragistics.Win.UltraWinTree.CancelableCellEventArgs)Returns the UltraTreeNodeCell object for which this instance was created.
Column (Inherited from Infragistics.Win.UltraWinTree.CancelableCellEventArgs)Returns the UltraTreeNodeColumn for which this instance was created.
Node (Inherited from Infragistics.Win.UltraWinTree.CancelableCellEventArgs)Returns the UltraTreeNode for which this instance was created.
Example
The following code sample demonstrates how to alert the end user when an edit mode session is canceled and the edited cell's value has changed, and display a confirmation dialog to prompt them as to whether the changes should be discarded:

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.Win
Imports Infragistics.Win.UltraWinTree

    Private Sub ultraTree1_BeforeCellExitEditMode(ByVal sender As Object, ByVal e As BeforeCellExitEditModeEventArgs) Handles ultraTree1.BeforeCellExitEditMode
        If e.ApplyChanges = False Then

            Dim cellValue As Object = e.Cell.Value
            Dim editorValue As Object = IIf(e.Cell.EditorResolved.IsValid, e.Cell.EditorResolved.Value, Nothing)

            If Object.Equals(cellValue, editorValue) = False Then

                Dim result As DialogResult = MessageBox.Show("The cell's contents have changed. Are you sure you want to discard changes?", "WARNING", MessageBoxButtons.YesNo, MessageBoxIcon.Stop)

                If (result = DialogResult.No) Then
                    e.Cancel = True
                End If
            End If
        End If
    End Sub
using Infragistics.Win;
using Infragistics.Win.UltraWinTree;
using System.Diagnostics;

		private void ultraTree1_BeforeCellExitEditMode(object sender, Infragistics.Win.UltraWinTree.BeforeCellExitEditModeEventArgs e)
		{
			if ( e.ApplyChanges == false )
			{
				object cellValue = e.Cell.Value;
				object editorValue = e.Cell.EditorResolved.IsValid ? e.Cell.EditorResolved.Value : null;

				if ( object.Equals(cellValue, editorValue) == false )
				{
					DialogResult result = MessageBox.Show( "The cell's contents have changed. Are you sure you want to discard changes?", "WARNING", MessageBoxButtons.YesNo, MessageBoxIcon.Stop );
					
					if ( result == DialogResult.No )
						e.Cancel = true;
				}
			}
		}
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