How to determine the ToolStripItem actual type from a ToolStripItemsCollection

djack10

New member
Joined
Jul 31, 2011
Messages
1
Programming Experience
10+
I am converting a VB.Net application to C#. Everything else is going great. Except this bit. I have a function which builds menus,sub menus and seperators from a database. It can build a MenuStrip or a ContextMenuStrip which can then be assigned to a form.


This means that menus can be extensive and conpmex but managed outside the application, which I also use as part of my security access model. All menus are controlled from the database externally, it also means I can develop visual tools (Treeviews etc) to manage user menus. The application uses menus extensively which is by design.


Programmatically I want to assign an eventhandler to every item that isnt a dropdown or a seperator


In VB I would do this, (works perfectly)


C#:
Private Sub AddHandlers (ByVal voMenuItems As ToolStripItemCollection)


    For Each oItem in voMenuItems
        If TypeOf(oItem is ToolStripDropDown) then
            if oItem.DropDownItems.Count > 0 then
                AddHandlers(oItem.DropDownItems)
            Else
                AddHandler oItem.Click, AddressOf ToolBarButtonClick
            End If
        End If
    Next


End Sub


Private Sub ToolbarButtonClick(ByVal sender As System.Object, ByVal e As System.EventArgs)


    'Do something


End Sub
but how would I achieve the same in C#


I have to code my loop like this

C#:
    foreach (ToolStripItem oItem in voMenuItems)
Which always returns a ToolStripItem (using either, GetType or typeof), I cannot find any way to determine the type of item (ToolStripDropDown or ToolStripSeperator) that the ToolStripItem actually is, and even then I can't cast to the type that I want e.g.


C#:
    (ToolStripDropDown)oItem.DropDownItems.Count ...
This gives a compile time error


"System.Windows.Forms.ToolStripItem' does not contain a definition for 'DropDownItems' and no extension method 'DropDownItems' accepting a first argument of type 'System.Windows.Forms.ToolStripItem' could be found (are you missing a using directive or an assembly reference?)"
 

JohnH

C# Forum Moderator
Staff member
Joined
Apr 23, 2011
Messages
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Location
Norway
Programming Experience
10+
You can paste valid VB code into an online automatic code converter, and usually you get the code converted properly, try searching for 'convert vb to c#'. It would help more if you coded VB with Option Strict turned On of course.
By the way, DropDownItems is a property of ToolStripDropDownItem, which ToolStripMenuItem and a few others inherit. .
 
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