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Thread: Online / Offline Status Notice Board

  1. #1

    Thread Starter
    Junior Member
    Join Date
    Feb 2014
    Posts
    17

    Online / Offline Status Notice Board

    Hi,

    (I assume that this has been created already!)

    I'm looking to create a program (style) application which continually checks for an online/offline status of a device (could be local or public) and to display a visual colour of green to show that the connection is alive & the time that it was last checked..

    Not asking for someone to create this for me, just some help in the right direction?

  2. #2
    Lively Member Goggy's Avatar
    Join Date
    Oct 2017
    Posts
    75

    Re: Online / Offline Status Notice Board

    Try to ping an IP address or an URL

    Code:
    If My.Computer.Network.Ping("192.168.0.1") Then
            MsgBox("Connection ok")
        Else
            MsgBox("No Connection")
        End If
    https://msdn.microsoft.com/en-us/lib...v=vs.110).aspx
    Utterly useless, but always willing to help

    As a finishing touch god created the dutch

  3. #3
    You don't want to know.
    Join Date
    Aug 2010
    Posts
    4,550

    Re: Online / Offline Status Notice Board

    The hard part is "determining if the device is online/offline".

    If you're lucky, it has some API-like way to query its status. If that's true, this project is as trivial as using that.

    If you're not lucky, it doesn't. Then you have to figure out some way your program can do something that tells you if the thing is on or off. Goggy showed some code that can work, IF the device responds to ICMP pings. That's not guaranteed, and many devices don't. And you have to worry about all the usual suspects in terms of networking such as firewalls, outages, etc.
    This answer is wrong. You should be using TableAdapter and Dictionaries instead.

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