c# - 动态禁用特定的上下文菜单项

Question

我在上下文菜单中添加了 4 个菜单。如果在启动上下文菜单项期间被单击，如何禁用该特定的 ("Start") 菜单项？

ContextMenu conMenu1 = new ContextMenu();
public Form1()
{
            InitializeComponent();
    conMenu1.MenuItems.Add("Start", new System.EventHandler(this.Start_Click));
    conMenu1.MenuItems.Add("Pause", new System.EventHandler(this.Pause_Click));
    conMenu1.MenuItems.Add("Resume", new System.EventHandler(this.Resume_Click));
    conMenu1.MenuItems.Add("Stop", new System.EventHandler(this.Stop_Click));
}

private void Start_Click(object sender, EventArgs e)
{
    // Functionalities to disable start context menu item
}

Answer 1

你可以这样做。处理 ContextMenu.Opening 事件

private void conMenu1_Opening(object sender, CancelEventArgs e)
{
    conMenu1.Items[0].Enabled= false;
}