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[Bogoh67]

So i have an array of controls on the form

Code: Select all

Dim thectrls() As Control = {RegionBTN, FSBTN, FollowBTN, browseBTN, WBrowseBTN, Label1, Label2, Label3, SavetoTXT, WorkingTXT}

and i want to disable all of them in one code section i use this

Code: Select all

 For Each i As Control In thectrls
            i.Visible = False
        Next

but when i run this happens

For Each i As Control In thectrls
i.Visible = False
Next

Object reference not set to an instance of an object.

any help?

[M1z23R]

I used that but with same control type (label only) and it worked, i only changed it to For each L as Label. Not sure how to solve this :/

Edit:

If you are using threading (sockets for example) you'd have to use a callback thread. Maybe the error here is cross-thread operation. Not sure, but you can try with safe multi-thread.

Yet another edit: xD

I also remembered something, if you are doing this on form load event, try putting it in a form shown. Or in a simple button click to see if it works.

[MrAksel]

Its because one of the controls is 'Nothing'.

Code: Select all

For Each i As Control In thectrls
            If i IsNot Nothing Then i.Visible = False 'i.Enabled = false   ? You said you wanted to disable it'
        Next

[mandai]

Depending on which event you are using this code in the cause could also be because thectrls is null.

[Bogoh67]

Its because one of the controls is 'Nothing'.

Code: Select all

For Each i As Control In thectrls
            If i IsNot Nothing Then i.Visible = False 'i.Enabled = false   ? You said you wanted to disable it'
        Next

Depending on which event you are using this code in the cause could also be because thectrls is null.

Well you guys are right i think. I declared the thectrls control array in the form class and the for loop in the button click event.

new code:

Code: Select all

  Dim thectrls() As Control = {RegionBTN, FSBTN, FollowBTN, browseBTN, WBrowseBTN, Label1, Label2, Label3, SavetoTXT, WorkingTXT}
        FullScreen.Show()
        For Each i As Control In thectrls
            If i IsNot Nothing Then i.Visible = False 'i.Enabled = false   ? You said you wanted to disable it'
        Next

Thanks guys