DataGridView.DropRow Event

Occurs when users drop a row.

Namespace: DevExpress.XamarinForms.DataGrid

Assembly: DevExpress.XamarinForms.Grid.dll

NuGet Package: DevExpress.XamarinForms.Grid

Declaration

public event EventHandler<DropRowEventArgs> DropRow

Event Data

The DropRow 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

You can cancel the row drop to specific positions. In this case, a place for the row drop is allocated, but the row returns to its initial position when it is released.

1. Subscribe to DropRow event.

   Xaml

   <dxg:DataGridView AllowDragDropRows="True" 
                     DropRow="grid_DropRow"/>
   

2. In the event handler, set the Allow property to false to restrict row drop to the specified positions. Use the RowHandle property to obtain the dragged row handle and the DropRowHandle property to get the drop position. To access a data source item (EmployeeTask with the Name property) that corresponds to the drop target row, use the DropItem property.

   This example shows how to cancel dropping rows in the first and fifth positions:

   C#

   using DevExpress.XamarinForms.DataGrid;
   
   // ...
   private void grid_DropRow(object sender, DropRowEventArgs e) {
       if (e.DropRowHandle == 0 || e.DropRowHandle == 4) { 
           e.Allow = false;
           DisplayAlert("Alert", "You cannot replace this task: " 
           + ((EmployeeTask)e.DropItem).Name, "OK");
       }
   }