ToolStripItem.DragDrop Event

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Source:

ToolStripItem.cs

Occurs when the user drags an item and the user releases the mouse button, indicating that the item should be dropped into this item.

public:
 event System::Windows::Forms::DragEventHandler ^ DragDrop;

[System.ComponentModel.Browsable(false)]
public event System.Windows.Forms.DragEventHandler? DragDrop;

[<System.ComponentModel.Browsable(false)>]
member this.DragDrop : System.Windows.Forms.DragEventHandler 

Public Custom Event DragDrop As DragEventHandler 

Event Type

DragEventHandler

Attributes

BrowsableAttribute

Examples

The following code example shows how to convert the X and Y properties to a client Point. This code example is part of a larger example provided for the ToolStripRenderer class.

// This method defines the DragOver event behavior. 
protected override void OnDragOver(DragEventArgs dea)
{
    base.OnDragOver(dea);

    // Get the ToolStripButton control 
    // at the given mouse position.
    Point p = new Point(dea.X, dea.Y);
    ToolStripButton item = this.GetItemAt(
        this.PointToClient(p)) as ToolStripButton;

    // If the ToolStripButton control is the empty cell,
    // indicate that the move operation is valid.
    if( item == this.emptyCellButton )
    {
        // Set the drag operation to indicate a valid move.
        dea.Effect = DragDropEffects.Move;
    }
}

' This method defines the DragOver event behavior. 
Protected Overrides Sub OnDragOver(dea As DragEventArgs)
   MyBase.OnDragOver(dea)
   
   ' Get the ToolStripButton control 
   ' at the given mouse position.
   Dim p As New Point(dea.X, dea.Y)
   Dim item As ToolStripButton = CType(Me.GetItemAt(Me.PointToClient(p)), ToolStripButton)
   
   
   ' If the ToolStripButton control is the empty cell,
   ' indicate that the move operation is valid.
     If item Is Me.emptyCellButton Then
         ' Set the drag operation to indicate a valid move.
         dea.Effect = DragDropEffects.Move
     End If
 End Sub

Remarks

The X and Y properties of the DragEventArgs are in screen coordinates, not client coordinates. For more information about handling events, see Handling and Raising Events.