VS2010 - IP Monitor Program Question

Hey guys. I'm trying to build a program that can tell me if Lan, Wan1, and Wan2 are up or down on each of our offices. The Office and IP information are coming from a text file and I'm using listview to display the office and IPs. The format of the text file is like this:

San Jose, 192.x.x.x, 66.x.x.x, 209.x.x.x
San Francisco, 192.x.x.x, 66.x.x.x, 209.x.x.x
Sacramento, 192.x.x.x, 66.x.x.x, 209.x.x.x

Now what I want is for the IP font color to be green if there is network connection and it turns red if there is no network connection. I was wondering if you guys can give me some pointers on how I can achive this. Thanks.

Code:

---

Dim Office As String
        Dim Lan As String
        Dim Wan1 As String
        Dim Wan2 As String

        Try

            Dim sr As StreamReader
            Dim fs As FileStream
            fs = New FileStream(("C:\offices.txt"), FileMode.OpenOrCreate)
            sr = New StreamReader(fs)

            Dim itm As Object
            itm = sr.ReadLine
            While Not itm = Nothing
                Dim split As String() = itm.split(New [Char]() {","})
                Office = split(0)
                Lan = split(1)
                Wan1 = split(2)
                Wan2 = split(3)

                lvMain.Items.Add(Office)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Lan)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan1)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan2)

                itm = sr.ReadLine
            End While

            sr.Close()
            fs.Close()
        Catch ex As System.Exception

            System.Windows.Forms.MessageBox.Show(ex.Message, "Load Tool Data Error", MessageBoxButtons.OK, MessageBoxIcon.Error)

        End Try

    End Sub

---

http://msdn.microsoft.com/en-us/libr...tion.ping.aspx

Thanks dunfiddlin.

I don't know if I'm doing this right but I'm trying to get the green and red color on the Lan, for now but I get An unhandled exception of type 'System.Net.NetworkInformation.PingException' occurred in System.dll when starting the program.

Code:

---

Dim Office As String
        Dim Lan As String
        Dim Wan1 As String
        Dim Wan2 As String


        Try

            Dim sr As StreamReader
            Dim fs As FileStream
            fs = New FileStream(("C:\users\albertc\desktop\offices.txt"), FileMode.OpenOrCreate)
            sr = New StreamReader(fs)

            Dim itm As Object
            itm = sr.ReadLine
            While Not itm = Nothing
                Dim split As String() = itm.split(New [Char]() {","})
                Office = split(0)
                Lan = split(1)
                Wan1 = split(2)
                Wan2 = split(3)

                lvMain.Items.Add(Office)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Lan)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan1)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan2)

                itm = sr.ReadLine
            End While

            sr.Close()
            fs.Close()
        Catch ex As System.Exception

            System.Windows.Forms.MessageBox.Show(ex.Message, "Load Tool Data Error", MessageBoxButtons.OK, MessageBoxIcon.Error)

        End Try

        If My.Computer.Network.Ping(lvmain.Items(0).SubItems(1).Text) Then
            lvmain.Items(0).SubItems(1).ForeColor = Color.Green
        Else
            lvmain.Items(0).SubItems(1).ForeColor = Color.Red

        End If




    End Sub

---

Looks like you're leaving a space in the address string in the split so effectively it's like ...

My.Computer.Network.Ping(" 192.168.0.1")

Try trimming the string before you use it.

Thanks dundifflin. That helped. I removed the space and I added a new column for camera so it goes like this

Office,Lan,Wan1,Wan2,Camera
San Jose,192.x.x.x,65.x.x.x,66.x.x.x,192.x.x.x

So far, I have it working but it only works for row 1. I can make it work for row 2 but i have to repeat the same code as row one but just change the listview.items(0) to listview.items(1). The code can get really long if I'm having to do this for 22 offices. How do I simplify this? Any help would be greatly appreciated. Thanks.

Code:

---

Dim Office As String
        Dim Lan As String
        Dim Wan1 As String
        Dim Wan2 As String
        Dim Camera As String


        Try

            Dim sr As StreamReader
            Dim fs As FileStream
            fs = New FileStream(("C:\users\albertc\desktop\offices.txt"), FileMode.OpenOrCreate)
            sr = New StreamReader(fs)

            Dim itm As Object
            itm = sr.ReadLine
            While Not itm = Nothing
                Dim split As String() = itm.split(New [Char]() {","})
                Office = split(0)
                Lan = split(1)
                Wan1 = split(2)
                Wan2 = split(3)
                Camera = split(4)

                lvMain.Items.Add(Office)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Lan)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan1)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan2)
                lvmain.Items(lvmain.Items.Count - 1).SubItems.Add(Camera)
                itm = sr.ReadLine
            End While

            sr.Close()
            fs.Close()
        Catch ex As System.Exception

            System.Windows.Forms.MessageBox.Show(ex.Message, "Load Tool Data Error", MessageBoxButtons.OK, MessageBoxIcon.Error)

        End Try


        'Row One
        lvmain.Items(0).UseItemStyleForSubItems = False
        'Lan
        If My.Computer.Network.Ping(lvmain.Items(0).SubItems(1).Text) Then
            lvmain.Items(0).SubItems(1).ForeColor = Color.Green
        Else
            lvmain.Items(0).SubItems(1).ForeColor = Color.Red
        End If
        'Wan1
        If My.Computer.Network.Ping(lvmain.Items(0).SubItems(2).Text) Then
            lvmain.Items(0).SubItems(2).ForeColor = Color.Green
        Else
            lvmain.Items(0).SubItems(2).ForeColor = Color.Red
            'Wan2

        End If
        If My.Computer.Network.Ping(lvmain.Items(0).SubItems(3).Text) Then
            lvmain.Items(0).SubItems(3).ForeColor = Color.Green
        Else
            lvmain.Items(0).SubItems(3).ForeColor = Color.Red

        End If
        'Camera
        Dim portnum As Integer = 3000
            Dim hostname As String = lvmain.Items(0).SubItems(4).Text
            Try
                Dim client As New TcpClient(hostname, portnum)
                Dim ns As NetworkStream = client.GetStream()
                lvmain.Items(0).SubItems(4).ForeColor = Color.Green

            Catch
                lvmain.Items(0).SubItems(4).ForeColor = Color.Red

            End Try

       

    End Sub

---

Haven't tested but should do the job ...

vb.net Code:

Try
 
            'Dim sr As StreamReader
            'Dim fs As FileStream
            'fs = New FileStream(("C:\users\albertc\desktop\offices.txt"), FileMode.OpenOrCreate)
            'sr = New StreamReader(fs)
 
            'Dim itm As Object
            'itm = sr.ReadLine
            'While Not itm = Nothing
            For Each itm In IO.File.ReadLines("C:\users\albertc\desktop\offices.txt")
                Dim split As String() = itm.Split(New [Char]() {","})
                Office = split(0)
                Lan = split(1)
                Wan1 = split(2)
                Wan2 = split(3)
                Camera = split(4)
 
                lvMain.Items.Add(Office)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Lan)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan1)
                lvMain.Items(lvMain.Items.Count - 1).SubItems.Add(Wan2)
                lvmain.Items(lvmain.Items.Count - 1).SubItems.Add(Camera)
                itm = sr.ReadLine
            Next
 
            'sr.Close()
            'fs.Close()
        Catch ex As System.Exception
 
            System.Windows.Forms.MessageBox.Show(ex.Message, "Load Tool Data Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
 
        End Try

You can loop throught the Items and SubItems of the ListView control. Instead of the MessageBox, you can ping them and then act accordingly.

Code:

---

For i As Integer = 0 To lvMain.Items.Count - 1
  For j As Integer = 1 To lvMain.Items(i).SubItems.Count - 1
      MessageBox.Show(String.Format("{0} : ({1}) {2}", lvMain.Items(i).Text, lvMain.Columns(j).Text, lvMain.Items(i).SubItems(j).Text))
  Next
Next

---

EDIT: The code block messed up my formatting
EDIT 2: Added code to see the Column header related to the sub item.