Hi, i am facing a weir error..
bellow are the code that give by 32feet.net, it is (Bluetooth chatting sample)
Imports System.Net
Imports System.IO
Imports System.Net.Sockets
Imports InTheHand.Net.Sockets
Imports InTheHand.Net.Bluetooth
Imports InTheHand.Net
Public Class ChatForm
Inherits System.Windows.Forms.Form
Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu
Const MAX_MESSAGE_SIZE As Integer = 128
Const MAX_TRIES As Integer = 3
Private ServiceName As New Guid("{E075D486-E23D-4887-8AF5-DAA1F6A5B172}")
Dim btClient As New BluetoothClient
Dim btListener As BluetoothListener
Private listening As Boolean = True
'holds the incoming message
Dim str As String
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
MyBase.Dispose(disposing)
End Sub
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents txtMessagesArchive As System.Windows.Forms.TextBox
Friend WithEvents txtMessage As System.Windows.Forms.TextBox
Friend WithEvents mnuSend As System.Windows.Forms.MenuItem
Friend WithEvents mnuMenu As System.Windows.Forms.MenuItem
Friend WithEvents mnuSearch As System.Windows.Forms.MenuItem
Friend WithEvents mnuExit As System.Windows.Forms.MenuItem
Friend WithEvents cboDevices As System.Windows.Forms.ComboBox
Friend WithEvents btnSend As System.Windows.Forms.Button
Private Sub InitializeComponent()
Me.MainMenu1 = New System.Windows.Forms.MainMenu
Me.mnuSend = New System.Windows.Forms.MenuItem
Me.mnuMenu = New System.Windows.Forms.MenuItem
Me.mnuSearch = New System.Windows.Forms.MenuItem
Me.mnuExit = New System.Windows.Forms.MenuItem
Me.txtMessagesArchive = New System.Windows.Forms.TextBox
Me.txtMessage = New System.Windows.Forms.TextBox
Me.cboDevices = New System.Windows.Forms.ComboBox
Me.btnSend = New System.Windows.Forms.Button
'
'MainMenu1
'
Me.MainMenu1.MenuItems.Add(Me.mnuSend)
Me.MainMenu1.MenuItems.Add(Me.mnuMenu)
'
'mnuSend
'
Me.mnuSend.Text = "Send"
'
'mnuMenu
'
Me.mnuMenu.MenuItems.Add(Me.mnuSearch)
Me.mnuMenu.MenuItems.Add(Me.mnuExit)
Me.mnuMenu.Text = "Menu"
'
'mnuSearch
'
Me.mnuSearch.Text = "Search Again"
'
'mnuExit
'
Me.mnuExit.Text = "Exit"
'
'txtMessagesArchive
'
Me.txtMessagesArchive.Location = New System.Drawing.Point(8, 72)
Me.txtMessagesArchive.Multiline = True
Me.txtMessagesArchive.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
Me.txtMessagesArchive.Size = New System.Drawing.Size(224, 184)
Me.txtMessagesArchive.Text = ""
'
'txtMessage
'
Me.txtMessage.Location = New System.Drawing.Point(8, 8)
Me.txtMessage.Size = New System.Drawing.Size(176, 20)
Me.txtMessage.Text = ""
'
'cboDevices
'
Me.cboDevices.Location = New System.Drawing.Point(8, 40)
Me.cboDevices.Size = New System.Drawing.Size(224, 21)
'
'btnSend
'
Me.btnSend.Location = New System.Drawing.Point(184, 8)
Me.btnSend.Size = New System.Drawing.Size(48, 24)
Me.btnSend.Text = "Send"
'
'ChatForm
'
Me.Controls.Add(Me.btnSend)
Me.Controls.Add(Me.cboDevices)
Me.Controls.Add(Me.txtMessage)
Me.Controls.Add(Me.txtMessagesArchive)
Me.Menu = Me.MainMenu1
Me.MinimizeBox = False
Me.Text = "Bluetooth Chat"
End Sub
#End Region
Private Sub sendMessage(ByVal NumRetries As Integer, _
ByVal Buffer() As Byte, _
ByVal BufferLen As Integer)
Dim client As BluetoothClient = Nothing
Dim CurrentTries As Integer = 0
Do
Try
client = New BluetoothClient
client.Connect(New BluetoothEndPoint(CType(cboDevices.SelectedItem, BluetoothDeviceInfo).DeviceAddress, ServiceName))
Catch se As SocketException
If (CurrentTries >= NumRetries) Then
Throw se
End If
client = Nothing
End Try
CurrentTries = CurrentTries + 1
Loop While client Is Nothing And _
CurrentTries < NumRetries
If (client Is Nothing) Then
'timeout occurred
MsgBox("Error establishing contact")
Return
End If
Dim stream As System.IO.Stream = Nothing
Try
stream = client.GetStream()
stream.Write(Buffer, 0, BufferLen)
Catch e As Exception
MsgBox("Error sending")
Finally
If (Not stream Is Nothing) Then
stream.Close()
End If
If (Not client Is Nothing) Then
client.Close()
End If
End Try
End Sub
Private Function receiveMessage(ByVal BufferLen As Integer) _
As String
Dim bytesRead As Integer = 0
Dim client As BluetoothClient = Nothing
Dim stream As System.IO.Stream = Nothing
Dim Buffer(MAX_MESSAGE_SIZE) As Byte
Try
client = btListener.AcceptBluetoothClient() ' blocking call
stream = client.GetStream()
bytesRead = stream.Read(Buffer, 0, BufferLen)
str = client.RemoteMachineName + "->" + _
System.Text.Encoding.Unicode.GetString(Buffer, 0, bytesRead) + vbCrLf
Catch e As Exception
'dont display error if we are ending the listener
If listening Then
MsgBox("Error listening to incoming message")
End If
Finally
If (Not stream Is Nothing) Then
stream.Close()
End If
If (Not client Is Nothing) Then
client.Close()
End If
End Try
Return str
End Function
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
'Dim s As New InTheHand.Windows.Forms.SelectBluetoothDeviceDialog()
's.ForceAuthentication = True
's.ShowAuthenticated = True
's.ShowRemembered = True
's.ShowUnknown = True
's.ShowDialog()
Dim t1 As System.Threading.Thread
t1 = New System.Threading.Thread(AddressOf receiveLoop)
t1.Start()
btClient = New BluetoothClient
Dim bdi As BluetoothDeviceInfo() = btClient.DiscoverDevices()
cboDevices.DataSource = bdi
cboDevices.DisplayMember = "DeviceName"
End Sub
Public Sub receiveLoop()
Dim strReceived As String
btListener = New BluetoothListener(ServiceName)
btListener.Start()
strReceived = receiveMessage(MAX_MESSAGE_SIZE)
While listening '---keep on listening for new message
If strReceived <> "" Then
Me.Invoke(New EventHandler(AddressOf UpdateTextBox))
strReceived = receiveMessage(MAX_MESSAGE_SIZE)
End If
End While
End Sub
Private Sub UpdateTextBox(ByVal sender As Object, ByVal e As EventArgs)
'---delegate to update the textbox control
txtMessagesArchive.Text += str
End Sub
Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
'stop receive loop
listening = False
'stop listening service
btListener.Stop()
Application.Exit()
End Sub
Private Sub mnuSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuSend.Click
sendMessage(MAX_TRIES, _
System.Text.Encoding.Unicode.GetBytes(txtMessage.Text), _
txtMessage.Text.Length * 2)
End Sub
Private Sub mnuExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuExit.Click
Me.Close()
End Sub
Private Sub mnuSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuSearch.Click
Cursor.Current = Cursors.WaitCursor
Dim bdi As BluetoothDeviceInfo() = btClient.DiscoverDevices()
cboDevices.DataSource = bdi
Cursor.Current = Cursors.Default
End Sub
Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
mnuSend_Click(sender, e)
End Sub
End Classi just want to edit add with a function, that is when when txtMessagesArchive.text = "1" then messagebox will appear
Private Sub txtMessagesArchive_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtMessagesArchive.TextChanged
If txtMessagesArchive.Text = "1" Then
SessageBox.Show("ok")
End Ifbut when i received "1" in the "txtMessagesArchive.Text", it did not show me "ok".
for the same i create a simple application with the same concept, textbox1 as the component:
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
If TextBox1.Text = "1" Then
MessageBox.Show ("ok")
End If
End Subthis simple application is work.
kindly advice what is my codding mistake?
thanks
