private void MainTabControl_DragOver(object sender, DragEventArgs e)
{
TabPage source = (TabPage)e.Data.GetData(typeof(TabPage));
//SetCurrStatus($"MainTabControl_DragOver：{source}");
if (source != null)
{
for (int i = 0; i < MainTabControl.TabPages.Count; i++)
{
if (MainTabControl.GetTabRect(i).Contains(MainTabControl.PointToClient(new Point(e.X, e.Y))))
{
if (MainTabControl.TabPages.IndexOf(source) != i)
{
e.Effect = DragDropEffects.Move;
TabAdapter.Swap(MainTabControl.TabPages.IndexOf(source), i);
MainTabControl.SelectedTab = source;
SetCurrStatus($"拖动结束：{source.Text}");
return;
}
}
}
}
e.Effect = DragDropEffects.None;
}