如何在contextmenustrip上的子项上添加事件？ 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);     
     } 

如何我得到了项目[1]或项[2]分项？

Answer 1

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

，另一方面，所有其他的子项由ToolStripItemCollection DropDownItems

所以最简单的方式来获得两个被引用创建的项目是：

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

将成为：

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); 

或访问所有子项：

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

或访问特定的子项：

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