Codejock Forums Homepage
Forum Home Forum Home > Codejock Products > ActiveX COM > Calendar
  New Posts New Posts RSS Feed - ChangeEvent
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

ChangeEvent
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
tomgriff View Drop Down
Groupie
Groupie
Avatar

Joined: 10 August 2006
Status: Offline
Points: 25 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tomgriff Quote  Post ReplyReply Direct Link To This Post Topic: ChangeEvent
    Posted: 01 September 2006 at 2:49am
Hello,
 
I need to update a customProperty in an event if a user drags an event on the calendar. 
 
This fires the EventChange,  after I update the CustomProperty with the new data, I do the DataProvider.ChangeEvent pEvent method. 
 


If MsgBox("Are you sure you want to Re-Schedule this Appointment?", vbCritical + vbYesNoCancel) = vbYes Then
  Dim pEvent As CalendarEvent
  Set pEvent = calCalendar.DataProvider.GetEvent(EventID)
  
  Dim sSql As String
  Dim rsUpdate As New adodb.Recordset
  
  Dim retvar
  Dim iApptID As Integer
  Dim lngClientID As Long
  
  ' pEvent Is Nothing for recurrence Ocurrence and Exception.
  ' See CalendarControl_PatternChanged for recurrence events changes.
  If Not pEvent Is Nothing Then
   
    iApptID = Val(NZ(pEvent.CustomProperties("apptid"), 0))
    lngClientID = Val(NZ(pEvent.CustomProperties("clientid"), 0))
    retvar = goADO.ExecuteSQL("UPDATE tblDataClientApptDate SET Reschedule = True Where ApptID = " & iApptID)
    
    ' Now I need to build a new tblDataClientApptDate item for the rescheduled appointment.
    ' I need the new ApptID for the new Item, and I need to put the new apptID into the Customer Property of the event.
    iApptID = NZ(CLng(NZ(VLookup("Max([ApptID]) AS NextID", GetDBName(), "tblDataClientApptDate"), 0)) + 1)
    pEvent.CustomProperties("ApptID") = iApptID
    calCalendar.DataProvider.ChangeEvent pEvent
 
This puts me into a loop. 
 
Am I doing this at the wrong place or is there an excepted way to get out of the loop.
 
 
Back to Top
sserge View Drop Down
Moderator Group
Moderator Group


Joined: 01 December 2004
Status: Offline
Points: 1297 		Post Options Post Options   Thanks (0) Thanks(0)   Quote sserge Quote  Post ReplyReply Direct Link To This Post Posted: 01 September 2006 at 4:04pm
Hi,

Actually this is quite often case - when from some event handler you call method which fires this event again and you get a loop and stack overflow.
 
The idea to avoid this is to have a global semaphore of running this method, as following:

Dim g_bChangeEventRunning as Boolean
 
sub Form_Load()
    g_bChangeEventRunning = False
end sub
 
sub wndCalendar_EventChanged(......)
    OnErrOr GoTo mExit:
 
    if g_bChangeEventRunning then
        Exit sub
    end if
    
    g_bChangeEventRunning = True
    
    '------------------
    ' place your code here
    '------------------

mExit:
    g_bChangeEventRunning = False 'ensure that you reset this to false before exit this sub
 
end sub


--
WBR,
Serge
Back to Top
tomgriff View Drop Down
Groupie
Groupie
Avatar

Joined: 10 August 2006
Status: Offline
Points: 25 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tomgriff Quote  Post ReplyReply Direct Link To This Post Posted: 10 September 2006 at 5:09pm
Thanks for the reply. I will give this a try.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.04
Copyright ©2001-2021 Web Wiz Ltd.

This page was generated in 0.188 seconds.