How to add sub menu items in contextmenustrip using C#4.0?

问题

I have one contextmenustrip control associated with treenode. I have created one menu item in contextmenustrip manually in the form itself(for example named as "Assign").

Now I want to add sub menu items whenever user clicks this Assign item, it will create a list of users name as a sub menu item with checked or unchecked option.

For example, once user clicked Assign then I want to show the user name dynamically.

回答1:

To add an item, you would call

myContextMenuStrip.Items.Add("Item title", null, myClickHandler);

To add a sub-menu, you take an existing item and do the same to it:

(myContextMenuStrip.Items[0] as ToolStripMenuItem).DropDownItems.Add(...)

回答2:

Define your menu strip and items

ContextMenuStrip menu = new ContextMenuStrip();
ToolStripMenuItem item, submenu;

Create new item.

submenu = new ToolStripMenuItem();
submenu.Text = "Sub-menu 1";

At this time your new item is just like others. Now create several new items and add them to submenu:

item = new ToolStripMenuItem();
item.Text = "Sub-item 1";
submenu.DropDownItems.Add(item);

item = new ToolStripMenuItem();
item.Text = "Sub-item 2";
submenu.DropDownItems.Add(item);

At last add sub-menu to your main ContextMenuStrip

menu.Items.Add(submenu);

来源：https://stackoverflow.com/questions/5868446/how-to-add-sub-menu-items-in-contextmenustrip-using-c4-0