vb.net 如何在运行时动态添加菜单项
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时间：2020-09-09 17:29:53 来源:igfitidea点击:
How to add menu item dynamically during run time
提问by user2150279
I can perform the submenu list down using the codes below:
我可以使用以下代码向下执行子菜单列表：
Dim cm As GoContextMenu = New GoContextMenu(view) 'GoContextMenu Inherits System.Windows.Forms.ContextMenu
Dim subTop(1) As MenuItem ' if you have 2 submenu, then the array count is 2-1 = 1; subm(1)
Dim orMenu As New MenuItem("OR", New EventHandler(AddressOf Me.OrTopGateItem_Click))
Dim andMenu As New MenuItem("AND", New EventHandler(AddressOf Me.AndTopGateItem_Click))
cm.MenuItems.Add(New MenuItem("Type", subTop))
From the case above, I manage to create a submenu which is shown in the image below: screen shot of my submenu outcome
从上面的案例中，我设法创建了一个子菜单，如下图所示： 我的子菜单结果的屏幕截图
How can I dynamically add more submenu during run time?
如何在运行时动态添加更多子菜单？
Thank you.
谢谢你。
回答by John
Public Class Form1
Private Sub Form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load
Me.ContextMenuStrip = ContextMenuStrip1
Dim menu1 As New ToolStripMenuItem() With {.Text = "Menu Item 1", .Name = "mnuItem1"}
AddHandler menu1.Click, AddressOf mnuItem_Clicked
ContextMenuStrip1.Items.Add(menu1)
'Add a submenu to Menu 1
Dim menu2 As New ToolStripMenuItem() With {.Text = "Menu Item 2", .Name = "mnuItem2"}
'We have a reference to menu1 already, but here's how you can find the menu item by name...
For Each item As ToolStripMenuItem In ContextMenuStrip1.Items
If item.Name = "mnuItem1" Then
item.DropDownItems.Add(menu2)
AddHandler menu2.Click, AddressOf mnuItem_Clicked
End If
Next
End Sub
Private Sub mnuItem_Clicked(sender As Object, e As EventArgs)
ContextMenuStrip1.Hide() 'Sometimes the menu items can remain open. May not be necessary for you.
Dim item As ToolStripMenuItem = TryCast(sender, ToolStripMenuItem)
If item IsNot Nothing Then
MsgBox("You've clicked " & item.Name)
End If
End Sub
End Class
