CODEWITHSUNDEEP
vb.net
user3617487
user3617487

Reputation: 175

vb form re-appearing without requesting

I have narrowed my problem to this simple case, but can't seem to find what's going on:

In addition, when entering VisibleChanged, Form2 will stop with a MsgBox The code follows.

Now the Expected behavior, when clicking on button would be

all this does happend, but then,

Any idea why?

here's the code:

Public Class Form1
    Private Sub ButtonGO_Click(sender As Object, e As EventArgs) Handles ButtonGO.Click
        Me.Hide()
        Form2.Show()
    End Sub
End Class

and also

Public Class Form2
    Dim calls As Integer = 0
    Private Sub Form2_VisibleChanged(sender As Object, e As EventArgs) Handles Me.VisibleChanged
        calls += 1
        MsgBox("calling : " & calls & " / Me.Visible : " & Me.Visible)
        If Me.Visible Then
            Me.Hide()
            Form1.Show()
        End If
    End Sub
End Class

Upvotes: 3

Views: 93

Answers (1)

user3617487
user3617487

Reputation: 175

Ok, so in order to close : thanks for your answers, they tell what to do for a "full" VB coder.

As for my students, i.e. people who just use drag-n-drop-VB, the solution is to check conditions in Form1 and then only call Form2 when it will show up.

Note : This might seem trivial, but it may not be compliant with the "encapsulation" idea. That is what brought this issue up in the first place in my case.

Upvotes: 0

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