DataGridView.DragRowOver Event

Occurs each time a row is over another row when being dragged.

Namespace: DevExpress.XamarinForms.DataGrid

Assembly: DevExpress.XamarinForms.Grid.dll

NuGet Package: DevExpress.XamarinForms.Grid

Declaration

public event EventHandler<DropRowEventArgs> DragRowOver

Event Data

The DragRowOver event's data class is DropRowEventArgs. The following properties provide information specific to this event:

Property	Description
Allow	Gets or sets whether to allow or prohibit an operation with the row. Inherited from RowAllowEventArgs.
DragItem	Gets a data source item that corresponds to the dragged row. Inherited from DragRowEventArgs.
DropItem	Gets a data source item that corresponds to the drop target row.
DropRowHandle	Gets the grid’s dropped row handle.
RowHandle	Gets the grid’s row handle. Inherited from RowEventArgs.

Remarks

The DragRowOver event allows you to manage the drag-and-drop action on stage of moving the row over another rows.

You can prevent dropping the row to specific positions. In this case, no place for row drop is allocated.

1. Subscribe to the DragRowOver event.

   Xaml

   <dxg:DataGridView AllowDragDropRows="True" 
                     DragRowOver="grid_DragRowOver"/>
   

2. In the event handler, use the RowHandle property to identify the dragged row, and the DropRowHandle property to identify the drop position. Set the Allow property to false to prohibit row drop.

   The following example shows how to prevent users from dropping a row in a lower position:

   C#

   using DevExpress.XamarinForms.DataGrid;
   
   // ...
   private void grid_DragRowOver(object sender, DropRowEventArgs e) {
          if (e.DropRowHandle > e.RowHandle) e.Allow = false;
   }