如何將ContextMenu放入TabPage的標題中

Question

我有一個自定義TabControl ，其中我有TabPages與ContextMenu綁定到它們。

我希望菜單僅在單擊頁眉時顯示。

我所做的是，當單擊TabControl時，我檢查以下條件：

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);
            }
        }
    }
}

如果我將MouseUp綁定到TabControl ，我會在整個TabPage獲取ContextMenu 。 如果我將它綁定到TabPage ，我只在正文中獲取ContextMenu而不在標題中。

有沒有辦法讓ContextMenu只顯示在標題點擊？

Answer 1

只是不要將ContextMenu分配給任何東西......只需顯示它：

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);
    }

}

Answer 2

而不是像Idle_Mind所說的那樣覆蓋，你也可以對mouseevent上的普通tabcontrol做同樣的事情：

    private void tabControl1_MouseClick(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Right)
        {
            for (int i = 0; i < tabControl1.TabCount; ++i)
            {
                Rectangle r = tabControl1.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(tabControl1, e.Location);
                    break;
                }
            }
        }
    }

它完全相同，但不會在工具箱中添加額外的控件:)如果要在多個TabControl上使用它，也可以使它成為通用的。

    private void showContextMenu_MouseClick(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Right)
        {
            TabControl tabControl1 = sender as TabControl;
            [...]