如何在contextmenustrip的子項目上添加事件？ C＃

Question

for (int i = 0; i < client.Folders.Count; i++)
        {

            (ContextMenuListView.Items[1] as ToolStripMenuItem).DropDownItems.Add(client.Folders[i].Name);//add Folder to Move To
            (ContextMenuListView.Items[2] as ToolStripMenuItem).DropDownItems.Add(client.Folders[i].Name);                
        }

如何獲得Items [1]或Items [2]中的子項目？

Answer 1

ToolStripItemCollection.Add(string) （DropDownItems.Add（））將返回新的ToolStripItem ...

另一方面，所有其他子項由ToolStripItemCollection DropDownItems引用

因此，獲取兩個已創建項目的簡單方法是：

(ContextMenuListView.Items[1] as ToolStripMenuItem).DropDownItems.Add(client.Folders[i].Name);
(ContextMenuListView.Items[2] as ToolStripMenuItem).DropDownItems.Add(client.Folders[i].Name);

會成為：

ToolStripItem firstItem = (ContextMenuListView.Items[1] as ToolStripMenuItem).DropDownItems.Add(client.Folders[i].Name);
ToolStripItem secondItem = (ContextMenuListView.Items[2] as ToolStripMenuItem).DropDownItems.Add(client.Folders[i].Name);

或訪問所有子項：

foreach(ToolStripItem i in (ContextMenuListView.Items[1] as ToolStripMenuItem).DropDownItems.OfType<ToolStripItem>())
{
   //...
}

或訪問特定的子項目：

var specificItem = (ContextMenuListView.Items[1] as ToolStripMenuItem).DropDownItems.Item[0];