When a user drags an appointment (in timetable view) from one location on the calendar to another, what event is fired when they let go of the mouse button?  Here's the issue I am running into.  Our application is used to build a schedule for our networks television shows.  Since you of course can not have two television shows scheduled to air at the same time on a network, when a user drags a show (an appointment) that's already on the schedule from one time slot to another I have to check if a show is already scheduled at the time they are trying to drag the show to.  If a show is already scheduled at that time I need to remove the scheduled show and replace it with the one they dragged.  I have that working with the code below:

void ScheduleCalendar_ItemModified(object sender, ItemModifiedEventArgs e)
{
           FranchiseAiring airing = e.Item.Tag as FranchiseAiring;

           DeleteOverlappedItem(airing);
}

The DeleteOverlappedItem() method checks to see if an airing is already scheduled in the time slot.

The issue I am running into is it appears the ItemModified event fires off before the user releases the mouse button, causing them to delete an overlapping show when they don't want to.  So is there a different event I should be using to determine when a user is done dragging a show from one location to another?  I can't use ItemStartTimeChanged() or ItemEndTimeChanged() because those fire off multiple times, not just at the end of a drag and drop.

Thanks.

I updated the ItemModified() event to include a check for if no mousebutton is down like so:

void ScheduleCalendar_ItemModified(object sender, ItemModifiedEventArgs e)
{
           FranchiseAiring airing = e.Item.Tag as FranchiseAiring;

           if (Control.MouseButtons == MouseButtons.None)
               DeleteOverlappedItem(airing);
}

unfortunately this only works if you drag an appointment from one location on a schedule to another and release the mouse button right away.  If you drag an appointment from one location to another and then keep the mouse button held down for a second or two the ItemModified() event will execute and the Control.MouseButtons will equal MouseButtons.Left and the DeleteOverlappedItem() method won't get executed, giving me two shows in the same cell.

The ItemModified event should not be fired before the user releases the mouse button while dragging an item. If the event is fired before the user releases the mouse button, there might be something else causing this.

What I understand you want to achieve is letting users drag an item around without affecting the rest of the scheduled appointments. Once the item is dropped (i.e. the left mouse button is released) you wish to remove all overlapping appointments, leaving only the dragged item in its new time frame.

I am using the following code to achieve this and it is working well:

private void calendar1_ItemModified(object sender, MindFusion.Scheduling.WinForms.ItemModifiedEventArgs e)
{
    ItemCollection items =
	  calendar1.Schedule.GetAllItems(e.Item.StartTime, e.Item.EndTime);

    foreach (Item item in items)
    {
	  if (item != e.Item)
		calendar1.Schedule.Items.Remove(item);
    }
} 

Meppy

Does the same thing happen if you create a blank project with Planner.NET on it and try to handle the ItemModified event? I was just wondering whether there is a property set somewhere else in your project, which might be causing this behavior to occur. If the same thing happen in this new project as well, then the problem is definitely in the version of Planner.NET you are using.

Meppy

If you can send me your application or an application which reproduces this problem, I will be able to look into what might be causing it.

Meppy