ToolStripItem.DragDrop 事件

定義

發生於使用者拖曳項目以及釋放滑鼠按鈕時,表示項目應該放入這個項目中。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;
member this.DragDrop : System.Windows.Forms.DragEventHandler 
Public Custom Event DragDrop As DragEventHandler 
屬性

範例

下列程式碼範例示範如何將 XY 屬性轉換為用戶端 PointThe following code example shows how to convert the X and Y properties to a client Point. 這個程式碼範例是針對 ToolStripRenderer 類別所提供的較大範例的一部分。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

備註

DragEventArgsXY 屬性是在螢幕座標中,而不是用戶端座標。The X and Y properties of the DragEventArgs are in screen coordinates, not client coordinates. 如需處理事件的詳細資訊,請參閱處理和引發事件For more information about handling events, see Handling and Raising Events.

適用於