Drag and drop on MultiSelected rows

[Paulo Goncalves]

I have a scenario with two RagGridView, I need select 5 rows at RadGridView1 to drop at RadGridView2.

1 - Selected the 5 rows and release the button.
2 - Now I was press the left button again at one these 5 selected row to make the drag. At this moment all the rows was unselect. 

This is a different behavior from Windows Explorer and the comon multiselect lists.

[Stefan]

Hello Paulo,

Thank you for writing.

To prevent the deselection you should use a custom row behavior. Attached you can find a sample demonstrating how you can achieve this. Please have a look at it and let me know if you have any additional questions.

I hope this helps.
 
Regards,
Stefan
Telerik

[Paulo Goncalves]

Hi Stefan,

thanks for your help, I make a little bit modification, when release the button at selected row and the control key was pressed, the row is deselected. I use OnMouseUpLeft and a private flag at behavior Class.

class MyGridNavigator : GridDataRowBehavior
   {
       private bool RowSelectedNow;

       protected override bool OnMouseDownLeft(MouseEventArgs e)
       {
           RowSelectedNow = false;
           GridRowElement row = this.GetRowAtPoint(e.Location) as GridRowElement;
           if (row != null)
           {
               if (row.RowInfo.IsSelected) {return false;}
               if (Control.ModifierKeys == Keys.Control) {RowSelectedNow = true;}
           }
           return base.OnMouseDownLeft(e);
       }

       protected override bool OnMouseUpLeft(MouseEventArgs e)
       {
           GridRowElement row = this.GetRowAtPoint(e.Location) as GridRowElement;
           if (row != null)
           {
               if (Control.ModifierKeys == Keys.Control && RowSelectedNow == false)
               {
                   row.RowInfo.IsSelected = !row.RowInfo.IsSelected;
                   return false;
               }
           }
           return base.OnMouseUpLeft(e);
       }

   }

I have other doubt, I only Drag if the .AllowRowReorder=True at source RadGrid, but I don´t like reorder the source, How I supress ou disable the reorder event


Thanks

Paulo

[Stefan]

Hello Paulo,

To do that you would have to start the drag drop service in the grid manually. Here is a blog describing the whole process: http://blogs.telerik.com/careypayette/posts/13-05-15/extending-radgridview-to-enable-row-drag-and-drop-functionality.

Let us know if you have any other questions.
 
Regards,
Stefan
Telerik