MenuStrip 项目启用/禁用 vb.net
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/29661171/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
MenuStrip items Enable/Disable vb.net
提问by Anel Hodzic
How to programaticaly Enable or Disable MenuStrip items.
如何以编程方式启用或禁用 MenuStrip 项目。
Example if i have this
例如，如果我有这个
I want to disable the item2 and item3. Tried with
我想禁用 item2 和 item3。试过
MenuStrip1.Items("Item 1").Enabled = False
MenuStrip1.Items(2).Enabled = False
采纳答案by ??ssa P?ngj?rdenlarp
Going by the image, it appears you want to disable/enable things in the dropdown.
通过图像，您似乎想要禁用/启用下拉列表中的内容。
Each top level menu item is itself an object which contains the actual drop down items - the MenuStrip is just a container for them. So, if I have a File | View | Toolsmenu, there will be three ToolStripMenuItems to work with, each with a DropDownItemscollection of those entries. So:
每个顶级菜单项本身就是一个包含实际下拉项的对象 - MenuStrip 只是它们的容器。所以，如果我有一个File | View | Tools菜单，将有三个ToolStripMenuItems 可以使用，每个都有DropDownItems这些条目的集合。所以：
ViewMenuItem.DropDownItems(2).Enabled = False
This disables the 3rd dropdown item on the View menu. Yours might be named ItemsToolStripMenuItem. The UI designer doesn't use a key to create/add new dropdown items, so the string overload wont work unless you are adding them manually:
这将禁用“查看”菜单上的第三个下拉项。你的可能会被命名为ItemsToolStripMenuItem。UI 设计器不使用键来创建/添加新的下拉项，因此除非您手动添加它们，否则字符串重载将不起作用：
' create new DD item
Dim foo = New ToolStripMenuItem("Foo", Nothing,
AddressOf FooToolStripMenuItem_Click, "Foo")
' add to menu
ViewMenuItem.DropDownItems.Add(foo)
' access by key
ViewMenuItem.DropDownItems("Foo").Enabled = True
回答by Tony
Just to add to this. I'm using VS Express 2013, and ViewMenuItem.DropDownItems(2).Enabled = Falsewouldn't work for me.
只是为了补充这一点。我正在使用 VS Express 2013，ViewMenuItem.DropDownItems(2).Enabled = False对我不起作用。
I found that this did.
我发现确实如此。
ShowRawDataToolStripMenuItem.Enabled = True
My menu name in this instance is "Show raw data" or "ShowRawData"
在这种情况下，我的菜单名称是“显示原始数据”或“ShowRawData”
I hope this helps somebody else.
我希望这对其他人有帮助。
回答by Mirko Tipka
I'm using:
我正在使用：
ContextMenuStrip1.Items.Item(1).Enabled = False
ContextMenuStrip1.Items.Item(2).Enabled = False
