TreeView.DragItemsStarting TreeView.DragItemsStarting TreeView.DragItemsStarting TreeView.DragItemsStarting Event


Occurs when a drag operation that involves one of the items in the view is initiated.

public : event TypedEventHandler<TreeView, TreeViewDragItemsStartingEventArgs> DragItemsStarting
// Register
event_token DragItemsStarting(TypedEventHandler<TreeView, TreeViewDragItemsStartingEventArgs> const& handler) const;

// Revoke with event_token
void DragItemsStarting(event_token const& cookie) const;

// Revoke with event_revoker
DragItemsStarting_revoker DragItemsStarting(auto_revoke_t, TypedEventHandler<TreeView, TreeViewDragItemsStartingEventArgs> const& handler) const;
public event TypedEventHandler<TreeView, TreeViewDragItemsStartingEventArgs> DragItemsStarting
Public Event DragItemsStarting As TypedEventHandler (Of TreeView, TreeViewDragItemsStartingEventArgs)
<TreeView DragItemsStarting="eventhandler"/>


To receive this event, set the CanDragItems property to true.

This event occurs when you start a drag-and-drop operation, including when you perform a reorder operation by drag-and-drop. When you perform custom actions as a result of a drag-and-drop operation, you typically listen to this event and provide more data using the TreeViewDragItemsStartingEventArgs.Data property.

You can inspect the items being dragged by checking the TreeViewDragItemsStartingEventArgs.Items property.

You can cancel the drag operation by setting the TreeViewDragItemsStartingEventArgs.Cancel property to true.

See also