Class wth Thread

[nondos]

Hello

I have a problem with thread i have a class defntion i've create but every
time i call it from thread it's null any idea why?

code:

dim test as class1

test.a=1
test.b=2
test.c =3
Dim t As Thread

t = New Thread(AddressOf Me.DoIt)

t.Start()

sub doit()

dim a = test.a ' i get null

end sub

Public Class Class1

Public a As Integer

Public b As Integer

Public c As Integer

End Class

 

[Armin Zingler]

Hello

I have a problem with thread i have a class defntion i've create but
every time i call it from thread it's null any idea why?

You did not assign an object to variable test. Use "new" to do that:

code:

dim test as class1

test = new class1

test.a=1
test.b=2
test.c =3
Dim t As Thread

t = New Thread(AddressOf Me.DoIt)

t.Start()

sub doit()

dim a = test.a ' i get null

end sub

Public Class Class1

Public a As Integer

Public b As Integer

Public c As Integer

End Class

Armin

 

[Mr. Arnold]

Hello

I have a problem with thread i have a class defntion i've create but every
time i call it from thread it's null any idea why?

code:

dim test as class1

test.a=1
test.b=2
test.c =3
Dim t As Thread

t = New Thread(AddressOf Me.DoIt)

t.Start()

sub doit()

dim a = test.a ' i get null

end sub

Public Shared Class Class1

Public Shared a As Integer

Public Shared b As Integer

Public Shared c As Integer

End Class

Then you can use Class1.a = test.a

Use Goggle or go to the VS Help and look-up the *Shared* keyword and find
out what it does.

Either you have to instantiate class1 with Dim class1 = new class1 at some
point or you use the Shared keyword.

It should have not compiled or blew up IMHO. I don't know how you got away
with it. You must have Option Strict turned off for the project.

 

[Cor Ligthert [MVP]]

Hi mr Arnold,

Can you tell us why option strict should be off. At least (I am sure of)
both Armin and I are very interested in that.

Cor

 

[Mr. Arnold]

Hi mr Arnold,

Can you tell us why option strict should be off. At least (I am sure of)
both Armin and I are very interested in that.

I don't know ask the OP. The OP is the one that has the problem.

 

[Michel Posseth [MCP]]

I don't know ask the OP. The OP is the one that has the problem.

Lol

Well i guess the OP has a special sort of compiler

 

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Hi mr Arnold,

Can you tell us why option strict should be off. At least (I am sure of)
both Armin and I are very interested in that.

Cor

I must have been off, otherwise there would have been a compiling error.
That doesn't mean that it should be off.

 

[Guest]

Cor,


With option strict ON

the provided code would raise 2 errors

option strict requires all variabels to have an as clause
name Test is not declared ( as it is method scoped )

so it wouldn`t even compile

if run with option strict off it would also not compile because of some
coding errors



However this could run ( although not my prog style ) in this wayImports System.Threading
Public Class Form1
Private test As New Class1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
test.a = 1
test.b = 2
test.c = 3
Dim t As Thread

t = New Thread(AddressOf Me.doit)

t.Start()
End Sub
Sub doit()

Dim a As Integer = test.a ' now you get 1

End Sub

End Class
Public Class Class1
Public a As Integer
Public b As Integer
Public c As Integer
End Class

 

[Cor Ligthert [MVP]]

Michel,

I have had big fights with Armin about Option Strict, I found it very easy
to set it off, luckily it was as far as I remember me the only real
discussion with Armin. Now I think it is almost possible to cast to the
right object. (Even if that is casting over a cast).

Armin is one of the oldest members of this newsgroup, however it is normal
that he is doing nothing for almost a year and than begins again very
intensive.

Cor

 

[Cor Ligthert [MVP]]

correction
Almost "forever" possible