Ping machines from list and update .txt file

Posted on 2009-07-07
Last Modified: 2013-11-27
Hi Guys,

I need some help getting started with this, I have only just downloaded VB E 2008 and realised I cant update my old VB6 apps with it. So I need to start form scratch with this one.

I need a simple application to ping a list of machines listed in a .txt file, then update the .txt to file to state if ping was succesful or not.

I have got about 500 machines on a network at work and I want to see how many are left on through the night by running this, if they are on I will send a shutdown commmand. Before you ask they are not on a domain so I cant do this via a GP.

As always thanks for your help guys.
Question by:pnorris99
LVL 28

Accepted Solution

strickdd earned 160 total points
Comment Utility
1) Use a stream reader to read your list of computers to ping

2) Send a ping to the computer listed on each line as you loop through the stream reader
-- (vb example at the bottom)

3) Store the ping results for active computers to an arraylist (or text file and stream read again)

4) Loop through arraylist (or text file via stream reader) and send shutdown command.
LVL 41

Assisted Solution

graye earned 160 total points
Comment Utility
If you're interested in a complete example in VB.Net, take a look at the following:

Assisted Solution

emresamisuzer earned 160 total points
Comment Utility
I have written a small program to like you need. I think it will help you... This won't update the text file but create an xml report about the ping results. You need to have a dataset also!

<?xml version="1.0" standalone="yes"?>
<PingTest xmlns="">
Imports System.Net

Imports System.Net.NetworkInformation

Imports System.ComponentModel

Public Class Form1

    Private p As New Ping

    Private WithEvents workers As New List(Of BackgroundWorker)

    Private sets As New List(Of PingTest)

    Private hosts As New Hashtable

    Private cancel As Boolean = True

    Private Function PingIt(ByVal host As String) As PingReply

        Return p.Send(host)

    End Function

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim ofd As New OpenFileDialog

        ofd.Filter = "Text Files (*.txt)|*.txt"

        If ofd.ShowDialog = Windows.Forms.DialogResult.OK Then

            If ofd.FileName.Length > 0 Then

                If ofd.FileName.EndsWith(".txt") Then

                    TextBox1.Text = ofd.FileName

                End If

            End If

        End If

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        Label3.Text = Now.ToString

        Button2.Enabled = False

        Button3.Enabled = Not Button2.Enabled

        cancel = False





            Dim hs() As String = System.IO.File.ReadAllText(TextBox1.Text).Split(vbLf)

            For h As Integer = 0 To hs.Length - 1

                If hs(h).Trim.Length > 0 Then

                    hosts.Add(h, hs(h).Trim)

                    workers.Add(New BackgroundWorker())

                    sets.Add(New PingTest)

                    AddHandler workers(h).DoWork, AddressOf DoJob

                    workers(h).RunWorkerAsync(New Object() {h})

                End If


        Catch ex As Exception


            Button2.Enabled = True

            Button3.Enabled = Not Button2.Enabled

        End Try

    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        cancel = True

        Button2.Enabled = True

        Button3.Enabled = Not Button2.Enabled

    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click

        For s As Integer = 0 To sets.Count - 1

            sets(s).WriteXml(My.Application.Info.DirectoryPath & "\" & hosts(s) & ".xml")



    End Sub

    Private Sub DoJob(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs)

        While Not cancel

            Dim rep As PingReply = PingIt(hosts(e.Argument(0)))

            sets(e.Argument(0)).Pings.AddPingsRow(Now, hosts(e.Argument(0)), rep.RoundtripTime, rep.Status = IPStatus.Success)


        End While

    End Sub

End Class

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Author Closing Comment

Comment Utility
Thanks guys

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