VB.NET Перенаправление вывода команды захвата tshark застряло в StreamReader.ReadLine

Все это было проблемой tshark и никогда не было проблемой VB.Net. Как упомянул Mr.Kurt Knochner при ответе на вопрос Как передать вывод tshark в реальном времени?:

вывод tshark буферизуется. Пожалуйста, используйте опцию tshark -l, если вы хотите, чтобы tshark сбрасывал STDOUT после каждого пакета.

И, обратившись к документации tshark здесь:

-l Сбрасывать стандартный вывод после печати информации для каждого пакета.

Поэтому, чтобы заставить его работать, я добавил параметр --print вместе с -l в свою командную строку, и теперь он работает как шарм, где теперь он выглядит так:

tshark --print -l -i 10 -w ./sample.pcap -E separator=/t -T fields -e frame.number -e dns.qry.name src port 53

Вот моя окончательная версия кода:

Public Class Form1

    Dim outputQueue As New Queue(Of String)
    Dim captureAdapterID As Integer = 0
    Dim oProcess As Process

    Private Sub Button1_Click(sender1 As Object, e1 As EventArgs) Handles Button1.Click
        Button1.Enabled = False
        Button2.Enabled = True
        captureAdapterID = (ComboBox1.SelectedIndex + 1)
        BackgroundWorker1.RunWorkerAsync()
    End Sub

    Private Sub BackgroundWorker1_DoWork(sender1 As Object, e1 As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        Try
            oProcess = New Process()
            Dim oStartInfo As New ProcessStartInfo("C:\Program Files\Wireshark\tshark.exe", " --print -l -i " & captureAdapterID & " -w ./sample.pcap -E separator=/t -T fields -e frame.number -e dns.qry.name src port 53")
            oStartInfo.WorkingDirectory = New Uri(System.Windows.Forms.Application.StartupPath).LocalPath
            oStartInfo.UseShellExecute = False
            oStartInfo.RedirectStandardOutput = True

            oStartInfo.RedirectStandardError = True
            oStartInfo.CreateNoWindow = True
            oStartInfo.WindowStyle = ProcessWindowStyle.Hidden
            oProcess.StartInfo = oStartInfo

            If oProcess.Start() Then
                appendOutput("Capturing on device: " & captureAdapterID & " started.")
                Dim sOutput As String
                Using oStreamReader As System.IO.StreamReader = oProcess.StandardOutput
                    sOutput = oStreamReader.ReadLine
                    While Not sOutput Is Nothing
                        appendOutput(sOutput)
                        sOutput = oStreamReader.ReadLine
                    End While
                End Using

                Using oStreamReader As System.IO.StreamReader = oProcess.StandardError
                    sOutput = oStreamReader.ReadLine
                    While Not sOutput Is Nothing
                        appendOutput(sOutput)
                        sOutput = oStreamReader.ReadLine
                    End While
                End Using

                MsgBox("finished")
            Else
                MsgBox("Error starting the process")
            End If
        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            BackgroundWorker1.ReportProgress(10)
        End Try

    End Sub

    Private Sub appendOutput(sOutput As String)
        outputQueue.Enqueue(sOutput)
        BackgroundWorker1.ReportProgress(10)
    End Sub

    Private Sub BackgroundWorker1_ProgressChanged(sender As Object, e As System.ComponentModel.ProgressChangedEventArgs) Handles BackgroundWorker1.ProgressChanged
        Dim i As Integer = 0
        For i = 0 To outputQueue.Count - 1 Step 1
            RichTextBox1.AppendText(outputQueue.Dequeue & vbNewLine)
        Next
        RichTextBox1.ScrollToCaret()
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        BackgroundWorker1.CancelAsync()
        oProcess.Kill()
        Button1.Enabled = True
        Button2.Enabled = False
    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Try
            Dim process As New Process()
            Dim oStartInfo As New ProcessStartInfo("C:\Program Files\Wireshark\tshark.exe", " -D")
            oStartInfo.WorkingDirectory = New Uri(System.Windows.Forms.Application.StartupPath).LocalPath
            oStartInfo.UseShellExecute = False
            oStartInfo.RedirectStandardOutput = True

            oStartInfo.RedirectStandardError = True
            oStartInfo.CreateNoWindow = True
            oStartInfo.WindowStyle = ProcessWindowStyle.Hidden
            process.StartInfo = oStartInfo

            If process.Start() Then

                Dim sOutput As String
                Using oStreamReader As System.IO.StreamReader = process.StandardOutput
                    sOutput = oStreamReader.ReadToEnd
                    If Not sOutput Is Nothing Then
                        ComboBox1.Items.AddRange(sOutput.Trim.Split(vbNewLine))
                        Try
                            ComboBox1.SelectedIndex = 0
                        Catch ex As Exception

                        End Try
                    End If
                End Using
            Else
                MsgBox("Error starting the get adapter process failed")
            End If
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub
End Class