CODEWITHSUNDEEP
vb.net
SmashedPotato
SmashedPotato

Reputation: 75

How to delete dynamically-created controls in vb.net?

I have this program that creates control(textboxes, progressbars, labels, timers) dynamically. Now I created a button that when clicked, will erase the created controls on the form. What's the code to this?

Upvotes: 1

Views: 4130

Answers (2)

Oli Bowe
Oli Bowe

Reputation: 46

Like @Jens said above

    For each tb as TextBox in burstbox
        burstbox.Remove(tb)
        tb.Dispose()
    Next

Upvotes: 0

Jens
Jens

Reputation: 6375

When creating the controls keep the references around. For example you can use a list as a global variable.

Dim MyControls as List(Of Control)

When you create the controls you add them to the form's control collection and also to the list

MyControls = New List(Of Control)
[...]
Me.Controls.Add(NewControl)
MyControls.Add(NewControl)

Do delete the controls you remove them from the form and dispose them (free ressources)

For each c as Control in MyControls
  Me.Controls.Remove(c)
  c.Dispose()
Next

You can do this because controls are reference types. That means the objects in both the MyControls list and the ones displayed on the form point to the same instance and you can therefore dispose them easily afterwards.

Upvotes: 3

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