This example uses the ValidateAppointmentEventArgs' SaveChanges property to conditionally allow or disallow changes to the appointment; it uses the CloseDialog property to keep the dialog open until a certain condition is met, and it uses the OriginalAppointment property to inform the end user of the changes that have been made to the appointment.
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.Shared
Imports Infragistics.Win
Imports Infragistics.Win.UltraWinSchedule
Imports System.Diagnostics
Private Sub ultraCalendarInfo1_ValidateAppointment(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinSchedule.ValidateAppointmentEventArgs) Handles ultraCalendarInfo1.ValidateAppointment
'----------------------------------------------------------------------------------------------------
' Description
' ValidateAppointment
'
' Fires when an Appointment object is modified via the Appointment dialog
'
'----------------------------------------------------------------------------------------------------
' The SaveChanges property can be used to conditionally allow
' changes to be made to the appointment
If (Not e.Appointment.Tag Is Nothing) Then
Dim userID As String = e.Appointment.Tag
' If the user is not an administrator, don't save changes
If (userID.ToLower() <> "admin") Then
MessageBox.Show("You must have administrator rights to modify this Appointment.", "ValidateAppointment", MessageBoxButtons.OK, MessageBoxIcon.Error)
e.SaveChanges = False
Return
End If
End If
' The CloseDialog property can be used to keep the dialog
' open until the state of the Appointment object meets
' certain requirements
If (e.Appointment.Description Is Nothing Or e.Appointment.Description.Length = 0) Then
MessageBox.Show("You must enter a Description for this Appointment.", "ValidateAppointment", MessageBoxButtons.OK, MessageBoxIcon.Error)
e.CloseDialog = False
Return
End If
' The OriginalAppointment property can be used to determine what changes,
' if any, were made to the appointment object
Dim info As String = String.Empty
If (e.OriginalAppointment.StartDateTime <> e.Appointment.StartDateTime) Then
info += "The appointment's StartDateTime has changed." + vbCrLf
End If
If (e.OriginalAppointment.EndDateTime <> e.Appointment.EndDateTime) Then
info += "The appointment's EndDateTime has changed." + vbCrLf
End If
If (e.OriginalAppointment.Subject <> e.Appointment.Subject) Then
info += "The appointment's Subject has changed." + vbCrLf
End If
If (e.OriginalAppointment.Location <> e.Appointment.Location) Then
info += "The appointment's Location has changed." + vbCrLf
End If
If (e.OriginalAppointment.Description <> e.Appointment.Description) Then
info += "The appointment's Description has changed." + vbCrLf
End If
' If any of the properties we are concerned with changed, notify the end user
If (info.Length > 0) Then
MessageBox.Show(info, "ValidateAppointment", MessageBoxButtons.OK)
End If
End Sub
using System.Diagnostics;
using Infragistics.Shared;
using Infragistics.Win;
using Infragistics.Win.UltraWinSchedule;
private void ultraCalendarInfo1_ValidateAppointment(object sender, Infragistics.Win.UltraWinSchedule.ValidateAppointmentEventArgs e)
{
//----------------------------------------------------------------------------------------------------
// Description
// ValidateAppointment
//
// Fires when an Appointment object is modified via the Appointment dialog
//
//----------------------------------------------------------------------------------------------------
// The SaveChanges property can be used to conditionally allow
// changes to be made to the appointment
if ( e.Appointment.Tag is string )
{
string userID = e.Appointment.Tag as string;
// If the user is not an administrator, don't save changes
if ( userID.ToLower() != "admin" )
{
MessageBox.Show( "You must have administrator rights to modify this Appointment.", "ValidateAppointment", MessageBoxButtons.OK, MessageBoxIcon.Error );
e.SaveChanges = false;
return;
}
}
// The CloseDialog property can be used to keep the dialog
// open until the state of the Appointment object meets
// certain requirements
if ( e.Appointment.Description == null ||
e.Appointment.Description.Length == 0 )
{
MessageBox.Show( "You must enter a Description for this Appointment.", "ValidateAppointment", MessageBoxButtons.OK, MessageBoxIcon.Error );
e.CloseDialog = false;
return;
}
// The OriginalAppointment property can be used to determine what changes,
// if any, were made to the appointment object
string info = string.Empty;
if ( e.OriginalAppointment.StartDateTime != e.Appointment.StartDateTime)
info += "The appointment's StartDateTime has changed." + "\n";
if ( e.OriginalAppointment.EndDateTime != e.Appointment.EndDateTime)
info += "The appointment's EndDateTime has changed." + "\n";
if ( e.OriginalAppointment.Subject != e.Appointment.Subject )
info += "The appointment's Subject has changed." + "\n";
if ( e.OriginalAppointment.Location != e.Appointment.Location )
info += "The appointment's Location has changed." + "\n";
if ( e.OriginalAppointment.Description != e.Appointment.Description )
info += "The appointment's Description has changed." + "\n";
// If any of the properties we are concerned with changed, notify the end user
if ( info.Length > 0 )
MessageBox.Show( info, "ValidateAppointment", MessageBoxButtons.OK );
}
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
