dotNETportal.cz

Dobrý den,

vytvořil jsem si jednoduchý prográmek pro komunikaci s COM portem a mám problém s počítáním řádků v textboxu.

Chci, aby mi přičetl +1 do lablu při každém přidaném řádku.

Prosím o pomoc. Zde je můj kod

Imports System
Imports System.ComponentModel
Imports System.Threading
Imports System.IO.Ports
Imports System.Windows.Forms




Public Class frmMain
   
    Dim myPort As Array  'COM Ports +detected on the system will be stored here
    Delegate Sub SetTextCallback(ByVal [text] As String) 'Added to prevent threading errors during receiveing of data
    Dim bytes() As Byte = {&H2A, &H61, &H0, &H5, &HFE, &H2, &H60, &HF, &HD}
    Dim buffer As String
    Dim count As Integer
    Dim enc = New System.Text.UTF8Encoding
    Dim currentLineIndex As Integer = 0
    Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        'When our form loads, auto detect all serial ports in the system and populate the cmbPort Combo box.
        myPort = IO.Ports.SerialPort.GetPortNames() 'Get all com ports available
        cmbBaud.Items.Add(9600)     'Populate the cmbBaud Combo box to common baud rates used
        cmbBaud.Items.Add(19200)
        cmbBaud.Items.Add(38400)
        cmbBaud.Items.Add(57600)
        cmbBaud.Items.Add(115200)
     

        For i = 0 To UBound(myPort)
            cmbPort.Items.Add(myPort(i))
        Next
        cmbPort.Text = cmbPort.Items.Item(0)    'Set cmbPort text to the first COM port detected
        cmbBaud.Text = cmbBaud.Items.Item(0)    'Set cmbBaud text to the first Baud rate on the list

        btnDisconnect.Enabled = False           'Initially Disconnect Button is Disabled

    End Sub

   



    Private Sub btnConnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnConnect.Click
        SerialPort1.PortName = cmbPort.Text         'Set SerialPort1 to the selected COM port at startup
        SerialPort1.BaudRate = cmbBaud.Text         'Set Baud rate to the selected value on

        'Other Serial Port Property
        SerialPort1.Parity = IO.Ports.Parity.None
        SerialPort1.StopBits = IO.Ports.StopBits.One
        SerialPort1.DataBits = 8            'Open our serial port

        Try
            SerialPort1.Open()
        Catch
            MessageBox.Show("Přístup ke COM portu byl odepřen")
        End Try

        btnConnect.Enabled = False          'Disable Connect button
        btnDisconnect.Enabled = True        'and Enable Disconnect button

    End Sub

    Private Sub btnDisconnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisconnect.Click
        SerialPort1.Close()             'Close our Serial Port

        btnConnect.Enabled = True
        btnDisconnect.Enabled = False
    End Sub

    Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click


        Try
            SerialPort1.Write(bytes, 0, bytes.Length)
        Catch
            MessageBox.Show("Port je zavřený")
        End Try

        'SerialPort1.Write(txtTransmit.Text & vbCr) 'The text contained in the txtText will be sent to the serial port as ascii
        'plus the carriage return (Enter Key) the carriage return can be ommitted if the other end does not need it
    End Sub

    Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
        'ReceivedText(SerialPort1.ReadExisting())    'Automatically called every time a data is received at the serialPort

        Dim bytelenght As Integer = SerialPort1.BytesToRead
        Dim test As String
        Dim testpole(bytelenght - 1) As Byte
        SerialPort1.Read(testpole, 0, bytelenght)
        test = BitConverter.ToString(testpole, 0)
        ' test = test.Replace("-", "")
        ReceivedText(test)
        Me.rtbReceived.Text = String.Format("{0}", vbCrLf & (currentLineIndex + 1).ToString())
        Label1.Text = rtbReceived.Lines.Count.ToString

    End Sub
    Private Sub ReceivedText(ByVal [text] As String)
        'compares the ID of the creating Thread to the ID of the calling Thread
        If Me.rtbReceived.InvokeRequired Then
            Dim x As New SetTextCallback(AddressOf ReceivedText)
            Me.Invoke(x, New Object() {(text)})
        Else
            Me.rtbReceived.Text &= [text] + vbLf

        End If



    End Sub

    Private Sub cmbPort_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbPort.SelectedIndexChanged
        If SerialPort1.IsOpen = False Then
            SerialPort1.PortName = cmbPort.Text         'pop a message box to user if he is changing ports
        Else                                                                               'without disconnecting first.
            MsgBox("Uzavřete port", vbCritical)
        End If
    End Sub

    Private Sub cmbBaud_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbBaud.SelectedIndexChanged
        If SerialPort1.IsOpen = False Then
            SerialPort1.BaudRate = cmbBaud.Text         'pop a message box to user if he is changing baud rate
        Else                                                            'without disconnecting first.
            MsgBox("Uzavřete port", vbCritical)
        End If

Nejlepší by bylo synchronizovat program s ryanem , ale to už je nad moje síly. Potřebuji automaticky počítat řádky. Díky za pomoc

Ryanova stránka http://ryanfarley.com/blog/archive/2004/...

zdravím a co takto?

    Private Sub TextBox1_TextChanged(sender As System.Object, e As System.EventArgs) Handles TextBox1.TextChanged
        Dim x As Integer = Split(TextBox1.Text, vbCrLf).Count
        Label1.Text = x
    End Sub