我创建了一种在拖放时移动 PictureBox 的方法。但是当我拖动 PictureBox 时,图像具有图像的实际大小,我希望图像具有 PictureBox 的大小
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
picBox = (PictureBox)sender;
var dragImage = (Bitmap)picBox.Image;
IntPtr icon = dragImage.GetHicon();
Cursor.Current = new Cursor(icon);
DoDragDrop(pictureBox1.Image, DragDropEffects.Copy);
DestroyIcon(icon);
}
}
protected override void OnGiveFeedback(GiveFeedbackEventArgs e)
{
e.UseDefaultCursors = false;
}
protected override void OnDragEnter(DragEventArgs e)
{
if (e.Data.GetDataPresent(typeof(Bitmap))) e.Effect = DragDropEffects.Copy;
}
protected override void OnDragDrop(DragEventArgs e)
{
picBox.Location = this.PointToClient(new Point(e.X - picBox.Width / 2, e.Y - picBox.Height / 2));
}
[System.Runtime.InteropServices.DllImport("user32.dll")]
extern static bool DestroyIcon(IntPtr handle);