Adding a WPF menuitem at rutime -- how to specify a click event handler?

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Hi all!

I am teaching myself WPF and slowly building my first application, so please be patient.

I have an array, named sProjectList, after which I add menuitems to a menu, this is working fine:

VB

Dim x As Integer
...
If IsArray(sProjectList) Then
    For i = sProjectList.GetLowerBound(0) To sProjectList.GetUpperBound(0)
        x = miProjectList.Items.Add(sProjectList(i, 0).ToString)
    Next i
End If

Now.. I need my menuitems to have a click event handler... how do I specify that? I have been searching but I am unable to find out... I tried getting a reference to the new menu item:

VB

Dim x As Integer
Dim mi As MenuItem
...
If IsArray(sProjectList) Then
            For i = sProjectList.GetLowerBound(0) To sProjectList.GetUpperBound(0)
                x = miProjectList.Items.Add(sProjectList(i, 0).ToString)
                mi = DirectCast(miProjectList.Items(x), MenuItem)
                '''what to do now???
            Next i
        End If

I am sure this is very easy, but I am just stuck on this one. Thank you in advance for your help!

Posted 25-Feb-11 0:50am

iris.frigole

Updated 25-Feb-11 3:16am

Toli Cuturicu

v2

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Toli Cuturicu 25-Feb-11 9:16am

Not c#. Removed misleading tag.

iris.frigole 25-Feb-11 11:03am

you are right, i tagged c# because although i am using vb .net i was happy to receive c# code as an answer, as i was more interested in the logic than the language. thank you.

2 solutions

Solution 2

This is the VB.NET code that does the trick (the one posted with the question would give a runtime error when casting to menu item):

VB

Dim sProjectList(,) As Object 'array with project names and ids
Dim mi As MenuItem
...
If IsArray(sProjectList) Then
    For i = sProjectList.GetLowerBound(0) To sProjectList.GetUpperBound(0)
        mi = New MenuItem()
        mi.Header = sProjectList(i, 0).ToString
        AddHandler mi.Click, AddressOf subShowOneProject
        miProjectList.Items.Add(mi)
    Next i
End If

miProjectList is a menuitem I defined in the xaml file.
subShowOneProject is the procedure that handles the click event.

HTH,

Iris

Posted 25-Feb-11 6:38am

iris.frigole

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Arun India · Accepted Answer · 2011-02-25T00:56:00

Solution 1

You Need to attach the event to the Menuitem
Menuitem+=new (Corresponding event Handler)(methodName)

Posted 25-Feb-11 0:56am

Arun India

Comments

iris.frigole 25-Feb-11 7:04am

Accepting your answer, as (as far as i can tell) this is C# for

AddHandler mi.Click, AddressOf the_handler_sub

Thank you!

Espen Harlinn 25-Feb-11 7:32am

Nice and simple, my 5