ToolStripItem.DragDrop ToolStripItem.DragDrop ToolStripItem.DragDrop ToolStripItem.DragDrop Event

定义

当用户拖动某项后再释放鼠标按钮时发生,指示此项应该被放入该项内。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 
属性

示例

下面的代码示例演示如何将XY属性转换为客户端PointThe following code example shows how to convert the X and Y properties to a client Point. 此代码示例是为ToolStripRenderer类提供的更大示例的一部分。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

注解

XDragEventArgs属性处于屏幕坐标中, 而不是客户端坐标。 YThe X and Y properties of the DragEventArgs are in screen coordinates, not client coordinates. 有关处理事件的详细信息, 请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

适用于