c# - 如何将 ContextMenu 放入 TabPage 的页眉

Question

我有一个自定义的 TabControl，其中我有 TabPages 和 ContextMenu 绑定(bind)到它们。

我希望菜单仅在单击页眉时显示。

我所做的是，当点击 TabControl 时，我会检查这些条件:

private void MouseUp(object sender, MouseEventArgs e) 
{
    if (e.Button == Mousebuttons.Right) 
    {
        for (int i = 0; i < TabCount; ++i) 
        {
            Rectangle r = GetTabRect(i);
            if (r.Contains(e.Location) /* && it is the header that was clicked*/) 
            {
                // Change slected index, get the page, create contextual menu
                ContextMenu cm = new ContextMenu();
                // Add several items to menu
                page.ContextMenu = cm;
                page.ContextMenu.Show(this, e.Location);
            }
        }
    }
}

如果我将 MouseUp 绑定(bind)到 TabControl，我将在整个 TabPage 中获得 ContextMenu .如果我将它绑定(bind)到 TabPage，我只会在正文中获得 ContextMenu，而不会在 header 中获得。

有没有办法让 ContextMenu 仅在标题点击时显示？

Answer 1

永远不要将 ContextMenu 分配给任何东西...只需显示它:

public class MyTabControl : TabControl
{

    protected override void OnMouseUp(MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Right)
        {
            for (int i = 0; i < TabCount; ++i)
            {
                Rectangle r = GetTabRect(i);
                if (r.Contains(e.Location) /* && it is the header that was clicked*/)
                {
                    // Change slected index, get the page, create contextual menu
                    ContextMenu cm = new ContextMenu();
                    // Add several items to menu
                    cm.MenuItems.Add("hello");
                    cm.MenuItems.Add("world!");
                    cm.Show(this, e.Location);
                    break;
                }
            }
        }
        base.OnMouseUp(e);
    }

}