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Normal Topic DragDrop in the same month, week or day (Read 4795 times)
elwin
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DragDrop in the same month, week or day
Feb 18th, 2010 at 2:38pm
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Hello,

I'm quite new with the calendar control. I'm trying some things in VB2008.
I'm showing a month, week or dayview with appointments. Now I want to drag and drop an appointment within the same view. This works automatically but I want to change an underlying proprty of the appointment.
I tried to put some code in the triggers DragDrop and DragEnter but without any result.
How can I change a property of the dragged appointment when dropping it?

Thanks in advance.
  
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Meppy
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Re: DragDrop in the same month, week or day
Reply #1 - Feb 18th, 2010 at 2:55pm
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You should handle the Calendar.ItemModified event and perform the necessary operations in the event handler. This event is raised when an item is moved or resized interactively by the user. Item interactions in the Calendar control are not realized as true drag-and-drop operations, therefore the Drag* events of the control are not raised for them.

Regards,
Meppy
  
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elwin
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Re: DragDrop in the same month, week or day
Reply #2 - Feb 19th, 2010 at 7:58am
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Thanks for the answer. I will try it today.
  
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Meppy
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Re: DragDrop in the same month, week or day
Reply #3 - Feb 19th, 2010 at 2:32pm
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On a side note, you can initiate true drag-and-drop operations on items by holding down the key specified by the Calendar.ItemDragKey property (CTRL by default) then clicking on an item and dragging. This is useful for special case scenarios, such as dragging an item from one instance of the Calendar control to another.

Regards,
Meppy
  
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DoctorsDad
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Re: DragDrop in the same month, week or day
Reply #4 - May 19th, 2011 at 4:33pm
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Meppy wrote on Feb 18th, 2010 at 2:55pm:
You should handle the Calendar.ItemModified ........ the Drag* events of the control are not raised for them.
Meppy



Why then does the supplied sample use the normal DragDrop functions?

I'm currently struggling with my evaluation project because the DragOver is working but DragDrop refuses to fire and I can't see why. Reading this post has just confused me even more!

DoctorsDad ???
  
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Stoyo
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Re: DragDrop in the same month, week or day
Reply #5 - May 19th, 2011 at 5:13pm
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What supplied sample are you alluding to? The DragOver and DragDrop events are raised for OLE drag and drop operations, which are used for transferring data between different controls or different applications. Moving an appointment within the same calendar does not start an OLE drag and drop operation, unless you press Ctrl at the same time. Are you dragging appointments between two calendar instances in this case, or do you need to detect when an appointment is being moved within its original calendar?
  
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