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Drag and Drop Appointments from a DataGrid to RadSchedualview

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ScheduleView
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Sammy
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Sammy asked on 27 Aug 2012, 08:15 PM
Trying to figure out how to do this.

I have a list of appointments in a regular silverlight DataGrid. I would like to Drag and Drop an appointment, from the DataGrid, to the RadScheduleView. Basically, this would be a copy of the appointment, but at a different time (for background info: the DataGrid shows the most popular appointments for that user, and it would allow them to drag and drop new appointments to the RadScheduleView. This would be a super quick and easy way to create appointments, without typing a single character)

I started to implement this, using the example:
http://demos.telerik.com/silverlight/#ScheduleView/DragDrop

But this shows the source as a RadListBox. I'm not quite understanding how I can change my source from a RadListBox to a regular DataGrid. If I have too, I would change my DataGrid to a RadGrid.

Any suggestions?

Thanks!

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Sammy
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answered on 28 Aug 2012, 02:06 PM
fyi...I switched to a RadGridView and got this working.

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Sammy
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answered on 30 Aug 2012, 03:18 AM
Ok, I have the drag and drop working. However, what is happening, is a Row is actually being removed from the RadGridview. Instead, I would like to implement a copy. Where the appointment is copied from the RadGridView to the ScheduleView.

What events/where should I be looking at to perform a copy, rather than removing rows?

Thanks!
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Dimitrina
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answered on 30 Aug 2012, 08:37 AM
Hello,

 As I understand you have implemented drag from a GridView with the help of the DragDropManager. Your problem is that when you drop the dragged GridViewRow to a destination, then it is removed from the GridView. I suppose that you remove the row once it has been dropped. I am not sure what is your exact implementation but may I ask you to check what code you execute when the DragDropCompleted event is raised? Do you remove the dragged item?

Greetings,
Didie
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Sammy
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answered on 30 Aug 2012, 11:56 AM
Hi Didie,
Thanks for taking the time to reply.  This is the 1st time I've implemented DragDrop with Telerik controls, so I don't quite understand how it works. Basically, I found some code on your website, and used that. Somehow it all automagically worked. I just don't understand how.  Here is my Xaml code:


      <telerik:RadGridView ...>
            <telerik:RadGridView.RowStyle>
                <Style TargetType="telerik:GridViewRow">
                    <Setter Property="drag:DragDropManager.AllowDrag" Value="True"  />
                </Style>
            </telerik:RadGridView.RowStyle>
<
gridDrag:GridViewDragDrop.Behavior>
      <gridDrag:GridViewDragDropBehavior  />
  </gridDrag:GridViewDragDrop.Behavior>
 
  <gridDrag:GridViewDragDrop.DataConverter>
      <local:DataConverterAppointments />
  </gridDrag:GridViewDragDrop.DataConverter>
 
  <gridDrag:GridViewDragDrop.DragVisualProvider>
      <dragDropBehaviors:ScreenshotDragVisualProvider />
  </gridDrag:GridViewDragDrop.DragVisualProvider>
      </telerik:RadGridView>

Here are the classes:

public class GridViewDragDrop : DragDrop<GridViewDragDropHelper, GridViewDragDropBehavior, Telerik.Windows.DragDrop.Behaviors.DragDropState>
{
 
}
 
public class GridViewDragDropBehavior : DragDropBehavior<Telerik.Windows.DragDrop.Behaviors.DragDropState>
{
 
}
 
public class GridViewDragDropHelper : DragDropHelper<GridViewDragDropBehavior, Telerik.Windows.DragDrop.Behaviors.DragDropState>
{
 
    protected override IList GetItemsSource(FrameworkElement control)
    {
        var gridView = control as RadGridView;
 
        return gridView == null ? null : (IList)gridView.ItemsSource;
    }
 
    protected override DependencyObject GetContainerFromItem(FrameworkElement control, object item)
    {
        return ((RadGridView)control).ItemContainerGenerator.ContainerFromItem(item);
    }
 
    protected override IEnumerable<object> GetDraggedItems(FrameworkElement element)
    {
        var gridView = element.ParentOfType<RadGridView>();
        if (gridView != null)
        {
            var selectedItems = gridView.SelectedItems;
            var item = element.DataContext;
 
            if (!selectedItems.Contains(item))
            {
                if (gridView.SelectionMode == System.Windows.Controls.SelectionMode.Single)
                {
                    gridView.SelectedItem = item;
                }
                else
                {
                    selectedItems.Add(item);
                }
            }
 
            return selectedItems.OfType<object>().ToList();
        }
        return Enumerable.Empty<object>();
    }
 
    protected override FrameworkElement FindDragSource(FrameworkElement element)
    {
        return element as RadGridView ?? element.ParentOfType<RadGridView>();
    }
 
    protected override FrameworkElement FindDraggedItem(FrameworkElement element)
    {
        return element as GridViewRow ?? element.ParentOfType<GridViewRow>();
    }
 
    protected override FrameworkElement FindDropItemsControl(FrameworkElement element, object data)
    {
        return element as RadGridView ?? element.ParentOfType<RadGridView>();
    }
 
    protected override FrameworkElement FindDropTarget(FrameworkElement element)
    {
        return element as RadGridView ?? element.ParentOfType<RadGridView>();
    }
}

There are 2 empty classes, and 1 that does some workl
I don't quite understand how the row is being removed, or what event I need to tie into to copy from the RadGridView, rather than remove from it.

Thanks for your time.



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Sammy
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Dimitrina
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