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How to parse specific output in vb.net

Posted on 2009-07-13
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Last Modified: 2012-05-07
I have the code working with the exception of it parsing only the output that I require. I'm having problems getting that to work. I'm wanting only the output to be the ip address within the brackets [xxx.xxx.xxx.xxx]


Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        If IO.File.Exists("C:\monitorlog.txt") Then
            IO.File.Delete("C:\monitorlog.txt")
        End If
 
        Dim Writer As New IO.StreamWriter("C:\monitor.txt", True)
        Dim item As Object
        For Each item In ListBox1.Items
            Dim machine As String = item.ToString
 
            ProgressBar1.Maximum = ListBox1.Items.Count
            ProgressBar1.Minimum = 0
            If ProgressBar1.Value < ListBox1.Items.Count Then
                ProgressBar1.Value = ProgressBar1.Value + 1
            End If
        Next
        'Try
        Dim si As New System.Diagnostics.ProcessStartInfo("cmd.exe")
 
        'Dim p As Process
        Dim x As String
        'Dim item
        Dim counter As Integer = 100            'you may need to play with this number to get it right for your system
        Dim y(counter) As Char
        Dim i As Integer
        Try
            Dim p As Process = New Process
            Dim entirefile
            Dim oread
 
            p.StartInfo.Arguments = " " & item
            'PrintDriverInfo.exe /S:MyServerName
            p.StartInfo.RedirectStandardOutput = True
            p.StartInfo.RedirectStandardInput = True
 
            p.StartInfo.CreateNoWindow = True
            p.StartInfo.UseShellExecute = False
            p.StartInfo.FileName = "ping.exe"
            p.Start()
 
            Dim sr As IO.StreamReader = p.StandardOutput 'out is a streamreader
            Dim sw As IO.StreamWriter = p.StandardInput  'inn is a streamwriter
            For i = 0 To counter - 1
 
            Next
            While Not p.HasExited
            End While
            Dim s As String = sr.ReadToEnd()
            If s <> "" Then
 
            End If
 
 
 
            If Not s Is Nothing Then
                          
 
 
                If s.StartsWith("Pinging") Then
                    Dim ip As String = s
 
                    If s.StartsWith("Pinging") Then
 
                        Dim u As Integer = s.IndexOf("[")
                        Dim r As Integer = s.IndexOf("]")
                        Dim q As Integer = s.IndexOf("]") - s.IndexOf("[")
                        s = s.Remove(u - r, s.Length - q)
                        WriteLog(s)
 
 
 
 
                        WriteLog(s)
 
 
 
 
                        p.Close()
 
 
                        
                    End If
 
 
                End If
 
            End If
 
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
 
 
 
 
 
 
 
 
 
 
 
        ProgressBar1.Value = 0
        Writer.Close()
        'Start("C:\monitor.txt")
 
 
 
    End Sub

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Question by:pover
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7 Comments
 
LVL 28

Expert Comment

by:strickdd
ID: 24841607
I would recommend using a regular expression to find the match of xxx.xxx.xxx.

Expression: "\d{1,3}\.\d{1,3}\.\d{1,3}"
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Author Comment

by:pover
ID: 24841946
Are you suggesting I put
If s.StartsWith("Pinging")


            Dim ip As String = [String].Format("\d{1,3}\.\d{1,3}\.\d{1,3}")

?
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LVL 28

Expert Comment

by:strickdd
ID: 24842135
I'm not sure what the VB.Net code is exactly (a little rusty) but here is the C# of what I suggest.
using System.Text.RegularExpressions
 
private void FindMatches(string StringToFindMatches)
{
   Regex myRegEx = new Regex(@"\d{1,3}\.\d{1,3}\.\d{1,3}");
 
   MatchCollection matches = myRegEx.FindMatches(StringToFindMatches);
 
   //matches will now contain a list of all IP addresses found in the file.
}

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Author Comment

by:pover
ID: 24843543
I changed the code to reflect to this but doesn't parse the data

 If Not s Is Nothing Then
         
                ' If s.StartsWith("Pinging") Then
                If True Then

                    Dim ip As String = s

                    Dim myRegEx As New Regex("\d{1,3}\.\d{1,3}\.\d{1,3}")

                    Dim matches As MatchCollection = myRegEx.Matches(ip)

                   
                    WriteLog(s)

It doesn't parse anything I checked with msgbox(s) to be sure.

I need it some way to parse the ip address which is in the brackets on a return ping.
Like you would see in a cmd shell  pinging hostname hostname.whatever.whatever.com [xxx.xxx.xxx.xx]  and have them appear in the Richtexbox that I have on the form.
Currently not just the ip in the brackets but everything else appears in the Richtextbox.

0
 
LVL 28

Expert Comment

by:strickdd
ID: 24848340
did you check the matches object? It should contain the list of IP addresses that you want. If it is empty, then we need to refine the regex.
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LVL 83

Expert Comment

by:CodeCruiser
ID: 24848346
The matches would be in matches collection so matches(0) would contain the first match and so on.
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Accepted Solution

by:
pover earned 0 total points
ID: 24849768
Unfortunately, I couldn't get it to work with those suggestions. However, this other code I was
tipped with works.

Dim s As String = sr.ReadLine()
                Do Until s Is Nothing
                    s = sr.ReadLine
                    Try
                        If s.StartsWith("Pinging") Then
                            Dim m As String() = s.Split("[")
                            Dim openbracket As String = m(1)
                            Dim splitlastbracket As String() = openbracket.Split("]")

                            Dim finalIP As String = splitlastbracket(0)

                            WriteLog(finalIP)

                        End If

                    Catch ex As Exception
                        'other error
                    End Try
                Loop
            Catch ex As Exception
                MsgBox(ex.ToString)
            End Try
        Next
        ProgressBar1.Value = 0
        Writer.Close()
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