Multiple Args to Background worker

[John Veldthuis]

I have set up a background worker and now find I need to give it multiple arguments.
What is the best way of doing this? An example would be nice.

[Bart Mermuys]

Hi,

"John Veldthuis" <wh******@you.s pam.me.com> wrote in message
news:g8******** *************** *********@4ax.c om...

I have set up a background worker and now find I need to give it multiple
arguments.
What is the best way of doing this? An example would be nice.

I assume your talking about BackgroundWorke r (NET2.0 component). Well you
can pass one argument, if you need to pass multiple then you could use a
class, a Hashtable or an array to group them and then pass that.

* Example using an array:

' start BackgroundWorke r
BackgroundWorke r1.RunWorkerAsy nc( New Object() { 10, "test" } )

' DoWork event
Private Sub BackgroundWorke r1_DoWork(ByVal sender As System.Object, ByVal e
As System.Componen tModel.DoWorkEv entArgs) Handles BackgroundWorke r1.DoWork

Dim args As Object() = DirectCast( e.Argument, Object() )

Dim arg1 As Integer = CInt(args(0))
Dim arg2 As String = CStr(args(1))

End Sub
HTH,
Greetings

[John Veldthuis]

On Tue, 27 Dec 2005 11:41:18 +1300, John Veldthuis <wh******@you.s pam.me.com> wrote:

I have set up a background worker and now find I need to give it multiple arguments.
What is the best way of doing this? An example would be nice.

Also forgot I need to return multiple results as well.

[Bart Mermuys]

Hi,

"John Veldthuis" <wh******@you.s pam.me.com> wrote in message
news:gt******** *************** *********@4ax.c om...

On Tue, 27 Dec 2005 11:41:18 +1300, John Veldthuis
<wh******@you.s pam.me.com> wrote:

I have set up a background worker and now find I need to give it multiple
arguments.
What is the best way of doing this? An example would be nice.

Also forgot I need to return multiple results as well.

That doesn't change much, as per my previous reply you could use an array,
Hashtable or class to group parameters and pass them as an object (for
e.Argument and e.Result ):

* Example using an array (multiple args & results):

' start BackgroundWorke r
BackgroundWorke r1.RunWorkerAsy nc( New Object() { 10, "test" } )

' DoWork event
Private Sub BackgroundWorke r1_DoWork(ByVal sender As System.Object, ByVal e
As System.Componen tModel.DoWorkEv entArgs) Handles BackgroundWorke r1.DoWork

Dim args As Object() = DirectCast( e.Argument, Object() )

Dim arg1 As Integer = CInt(args(0))
Dim arg2 As String = CStr(args(1))

' do something

e.Result = New Object() { -1, "test" }

End Sub

Private Sub BackgroundWorke r1_RunWorkerCom pleted(ByVal sender As Object,
ByVal e As System.Componen tModel.RunWorke rCompletedEvent Args) Handles
BackgroundWorke r1.RunWorkerCom pleted
Dim ret As Object() = DirectCast( e.Result, Object() )

Dim ret1 As Integer = CInt(ret(0))
Dim ret2 As String = CStr(ret(1))
End Sub

HTH,
Greetings

[John Veldthuis]

On Tue, 27 Dec 2005 00:38:29 +0100, "Bart Mermuys" <bm************ *@hotmail.com> wrote:

Hi,

"John Veldthuis" <wh******@you.s pam.me.com> wrote in message
news:g8******* *************** **********@4ax. com...

I have set up a background worker and now find I need to give it multiple
arguments.
What is the best way of doing this? An example would be nice.

I assume your talking about BackgroundWorke r (NET2.0 component). Well you
can pass one argument, if you need to pass multiple then you could use a
class, a Hashtable or an array to group them and then pass that.

* Example using an array:

' start BackgroundWorke r
BackgroundWork er1.RunWorkerAs ync( New Object() { 10, "test" } )

' DoWork event
Private Sub BackgroundWorke r1_DoWork(ByVal sender As System.Object, ByVal e
As System.Componen tModel.DoWorkEv entArgs) Handles BackgroundWorke r1.DoWork

Dim args As Object() = DirectCast( e.Argument, Object() )

Dim arg1 As Integer = CInt(args(0))
Dim arg2 As String = CStr(args(1))

End Sub

Thanks, Just what the doctor ordered for part one.