Hello Howard,
Thank you for writing.
RadGridView handles the whole drag and
drop operation by
RadGridViewDragDropService. The
PreviewDragOver event allows you to control on what targets the item being dragged can be dropped on. The
PreviewDragDrop event allows you to get a handle on all the aspects of the drag and drop operation, the source (drag) grid, the destination (target) grid, as well as the item being dragged. This is where we will initiate the actual physical move of the dragged item(s) from one grid to the other. In order to implement drag and drop functionality of a column from one grid to another, you can use the
sample approach below:
public Form1()
{
InitializeComponent();
RadDragDropService svc =
this.radGridView1.GridViewElement.GetService<RadDragDropService>();
svc.PreviewDragStart += svc_PreviewDragStart;
svc.PreviewDragDrop += svc_PreviewDragDrop;
svc.PreviewDragOver += svc_PreviewDragOver;
}
private void svc_PreviewDragStart(object sender, PreviewDragStartEventArgs e)
{
e.CanStart = true;
}
private void svc_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
SnapshotDragItem draggedItem = e.DragInstance as SnapshotDragItem;
GridHeaderCellElement targetHeaderCell = e.HitTarget as GridHeaderCellElement;
if (draggedItem != null && targetHeaderCell != null)
{
GridHeaderCellElement sourceHeaderCell = draggedItem.Item as GridHeaderCellElement;
if (sourceHeaderCell != null && targetHeaderCell.GridViewElement != sourceHeaderCell.GridViewElement)
{
e.CanDrop = true;
}
else
{
e.CanDrop = false;
}
}
}
private void svc_PreviewDragDrop(object sender, RadDropEventArgs e)
{
SnapshotDragItem draggedItem = e.DragInstance as SnapshotDragItem;
GridHeaderCellElement targetHeaderCell = e.HitTarget as GridHeaderCellElement;
if (draggedItem == null || targetHeaderCell == null)
{
return;
}
GridHeaderCellElement sourceHeaderCell = draggedItem.Item as GridHeaderCellElement;
if (sourceHeaderCell != null)
{
e.Handled = true;
sourceHeaderCell.GridViewElement.Template.Columns.Remove(sourceHeaderCell.ColumnInfo.Name);
GridViewTemplate targetTemplate = targetHeaderCell.GridViewElement.Template;
targetTemplate.Columns.Insert(targetTemplate.Columns.IndexOf(targetHeaderCell.ColumnInfo.Name),
sourceHeaderCell.ColumnInfo as GridViewDataColumn );
}
}
Note that this is just an example and it may not cover all possible cases. Feel free to modify it on a way which suits your requirement best.
I hope this information helps. Should you have further questions I would be glad to help.
Regards,
Dess
Telerik
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the
Telerik Feedback Portal and vote to affect the priority of the items