cross thread problem

[hamzahkh]

hi .
i have 2 application clinet/server the server broadcast media files to client i used tcp/ip protocol the server code is work good but i have a problem in client code i need help , ineed someone to correct the code .iwll show where the error is in the code
note: i call the class in the main form dim a as recive in the starter of the main form class to be gloable .
thanks

Imports System.Net.Sockets
Imports System.Windows.Forms
Imports System.IO
Imports System.Threading
Imports System.Windows.Forms.Control
Imports System.Runtime.Remoting
Imports System.Runtime.Remoting.Channels
Imports System.Net



Public Class recieve


    Private reader As BinaryReader
    Private message As String = ""
    Private frmObject As frmMain

    ' Dim k As String = ""C:\Users\hamzah\Desktop\BVP\BVP_client\BVP.txt

    Private readthred As Thread
    Public Sub New(ByVal frmObject As frmMain)
        MyBase.New()
        Me.frmObject = frmObject

        readthred = New Thread(AddressOf runClinet)


        readthred.TrySetApartmentState(ApartmentState.STA)
        readthred.SetApartmentState(ApartmentState.STA)






        ' If readthred.TrySetApartmentState(ApartmentState.STA) Then
        readthred.Start()
        '   End If





    End Sub


    Public Sub runClinet()
        Dim client As TcpClient
        Try

            client = New TcpClient()
            client.Connect("127.0.0.1", 5234)
            reader = New BinaryReader(client.GetStream())

            Try
                Dim Path As String
                Path = reader.ReadString

                frmMain.ListBox1.SelectedItem = path'Cross-thread operation not valid: Control 'ListBox1' accessed from a thread other than the thread it was created on.

                frmObject.Playlist.SelectedItem = frmObject.ListBox.SelectedItem  'Cross-thread operation not valid: Control 'ListBox1' accessed from a thread other than the thread it was created on.
                frmMain.AxWindowsMediaPlayer1.URL = Path

                frmObject.ListBox1.Items.Add(Path)
                frmObject.Playlist.Items.Add(Path)
                Try
                    While True
                        Path = reader.ReadString
                        Select Case Path
                            Case "1"
                                frmObject.AxWindowsMediaPlayer1.Ctlcontrols.pause()
                            Case "2"
                                frmObject.AxWindowsMediaPlayer1.Ctlcontrols.play()
                            Case "3"
                                frmObject.AxWindowsMediaPlayer1.Ctlcontrols.stop()
                        End Select
                    End While
                Catch ex As Exception
                End Try

            Catch inputoutputException As IOException
            Finally
            End Try
            Try
                frmObject.AxWindowsMediaPlayer1.Ctlcontrols.stop()
                reader.Close()
                client.Close()

            Catch exx As Exception
            End Try
        Catch inputoutputException As IOException
        End Try
    End Sub
   
End Class

[BackWoodsCoder]

http://social.msdn.microsoft.com/For...-2958d7415eb3/


A background worker would probably be the best choice here.

[hamzahkh]

can you till me the functionalty of background worker ? and in my problem what i should type inside it ??

[BackWoodsCoder]

Did you read the MSDN thread? There's a few links in there that explain everything you need to know about background workers.

[jmcilhinney]

You can follow the CodeBank link in my signature and check out my thread on Using The BackgroundWorker.