Question

vb.net - keeping a running count ...

Asked by: sirbounty

I'm developing a service that will basically test a list of devices for network presence.
If they're 'live', then nothing is to happen, however, if they don't respond on the network, I want to keep a tally.
They will be tested weekly, but after three strikes, I want to perform another function.

So, I'm looking for suggestions on storing such a tally.
Registry, external file, something else?
Realize there could be 100 or more of these being tracked at any given point.  Eventually, it'll be reduced, but still somewhere in the neighborhood of up to a couple dozen would still be possible...

So something that basically lists the hostname and the number of absences.  Suggestions?

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Asked On
2008-08-01 at 10:38:47ID23614884
Topics

.NET

,

Microsoft Visual Basic.Net

,

.NET Framework 2.x

Participating Experts
2
Points
350
Comments
5

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Answers

 

by: sl8rzPosted on 2008-08-01 at 10:52:19ID: 22140461

Wheather you use a database or flat file the functionality you need is "ping", it's built into .NET (see "Systm.Net.Networkinformation" of the System Namespace).

 

by: sirbountyPosted on 2008-08-01 at 10:53:39ID: 22140476

Yes, I've got all that part down, just curious on how to store the number of failures...

 

by: Joe_GriffithPosted on 2008-08-01 at 10:57:05ID: 22140502

A database seems like overkill. I would just load and save an xml document. It's easy to search for the item you want and is flexible if you need to add other data besides a count at a later time.

 

by: sirbountyPosted on 2008-08-01 at 10:59:44ID: 22140530

That's what I was thinking along the lines of as well.
Besides, it'll run under the system account, and since the db would be remote, it would be a bit more difficult to accomplish.

However, I've only worked with xml in .net once or twice - would you have any quick references on how to set this up?

 

by: Joe_GriffithPosted on 2008-08-01 at 12:26:47ID: 22141242

Just use notepad to create an xml file that looks something like this:

<?xml version="1.0" encoding="UTF-8" ?>
<MyData>
  <Red Count = "2"/>
  <Blue Count = "5"/>
  <Green Count = "0"/>
</MyData>

Then use the code below to access the data

  Private MyXML As XmlDocument
 
  Private Sub LoadData()
    MyXML = New XmlDocument
    MyXML.Load("C:\SomeFile.XML")
  End Sub
 
  Private Function GetBlueCount() As Integer
    Return CInt(MyXML.SelectSingleNode("//Blue").Attributes("Count").Value)
  End Function
 
  Private Sub PutRedCount(ByVal theCount As Integer)
    MyXML.SelectSingleNode("//Red").Attributes("Count").Value = theCount.ToString
  End Sub
 
  Private Sub SaveData()
    MyXML.Save("C:\SomeFile.XML")
  End Sub

                                              
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