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BeforeActivitiesDeletedEventHandler Delegate

Delegate for handling the UltraMonthViewSingleBase.BeforeActivitiesDeleted event
Syntax
'Declaration
 
Public Delegate Sub BeforeActivitiesDeletedEventHandler( _
   ByVal sender As Object, _
   ByVal e As BeforeActivitiesDeletedEventArgs _
) 
public delegate void BeforeActivitiesDeletedEventHandler( 
   object sender,
   BeforeActivitiesDeletedEventArgs e
)

Parameters

sender
e
Example
This example demonstrates how to use the BeforeActivitiesDeletedEventArgs class' properties to only display a dialog when appointments are deleted.

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.

Private Sub UltraMonthViewSingle1_BeforeActivitiesDeleted(ByVal sender As System.Object, ByVal e As Infragistics.Win.UltraWinSchedule.BeforeActivitiesDeletedEventArgs) Handles ultraMonthViewSingle.BeforeActivitiesDeleted

    '----------------------------------------------------------------------------------------------------
    '	Description
    '	BeforeActivitiesDeleted
    '
    '	Fires before one or more Appointments or Notes are deleted via the control's UI.
    '	If the event is canceled, the activities are not deleted, and the AfterActivitiesDeleted event does not fire.
    '
    '----------------------------------------------------------------------------------------------------

    '	Set the DisplayPromptMsg property to false so that the control's
    '	default dialog is not displayed
    e.DisplayPromptMsg = False

    '	Since the control will remove all selected appointments and/or notes, get
    '	the number of selected appointments
    Dim selectedAppointmentCount As Integer = Me.ultraMonthViewSingle1.CalendarInfo.SelectedAppointments.Count

    '	If there were no selected Appointments, then the user is only deleting
    '	Notes, so we need not display a confirmation dialog. The 'Cancel' property
    '	of the event arguments defaults to false, so we can return now and the Notes
    '	will be deleted without a prompt.
    If selectedAppointmentCount = 0 Then Return

    '	Build the dialog string
    Dim info As String = String.Empty
    info += selectedAppointmentCount.ToString() + " Appointment(s) will be deleted." + vbCrLf
    info += "Choose Yes to delete the Appointments, or No to exit without deleting them."

    '	Display the custom dialog
    Dim result As DialogResult = MessageBox.Show(info, "Delete selected Appointments", MessageBoxButtons.YesNo, MessageBoxIcon.Warning)

    '	If the user selected No, set the 'Cancel' property of the event arguments to true
    If result = DialogResult.No Then e.Cancel = True

End Sub
private void ultraMonthViewSingle1_BeforeActivitiesDeleted(object sender, Infragistics.Win.UltraWinSchedule.BeforeActivitiesDeletedEventArgs e)
{		
	//----------------------------------------------------------------------------------------------------
	//	Description
	//	BeforeActivitiesDeleted
	//
	//	Fires before one or more Appointments or Notes are deleted via the control's UI.
	//	If the event is canceled, the activities are not deleted, and the AfterActivitiesDeleted event does not fire.
	//
	//----------------------------------------------------------------------------------------------------

	//	Set the DisplayPromptMsg property to false so that the control's
	//	default dialog is not displayed
	e.DisplayPromptMsg = false;

	//	Since the control will remove all selected appointments and/or notes, get
	//	the number of selected appointments
	int selectedAppointmentCount = this.ultraMonthViewSingle1.CalendarInfo.SelectedAppointments.Count;

	//	If there were no selected Appointments, then the user is only deleting
	//	Notes, so we need not display a confirmation dialog. The 'Cancel' property
	//	of the event arguments defaults to false, so we can return now and the Notes
	//	will be deleted without a prompt.
	if ( selectedAppointmentCount == 0 )
		return;

	//	Build the dialog string
	string info = string.Empty;
	info += selectedAppointmentCount.ToString() + " Appointment(s) will be deleted." + "\n";
	info += "Choose Yes to delete the Appointments, or No to exit without deleting them.";

	//	Display the custom dialog
	DialogResult result = MessageBox.Show( info, "Delete selected Appointments", MessageBoxButtons.YesNo, MessageBoxIcon.Warning );

	//	If the user selected No, set the 'Cancel' property of the event arguments to true
	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