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Array of a specific type

Posted on 2006-10-21
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Last Modified: 2010-04-23
Hello experts,

I am making an application that receives various blocks of information from a server application.  One type of information that my application will need to receive, process and display (in a list box) is the name of other users who are connected to the server.

The information is sent to my application through a socket connection and blocks of data are sent as applicable....as in if someone new connects then a new block with those details is sent.  

So I know I need to use an array of some kind in order to store this information.  At first the array will be empty because the application needs to receive a data block with a new user's details.  So lets say the application gets a new user....I will clearly need to redim the array (preserving current data) to enable me to add the new data block.  That's fine and easy - no problems.  The datablock contains the user's name and their connected name (callsign if you will).  Once I have this information my program requests more information and this is sent in a different datablock.  In total the information I need to store, for each user, is:

* Callsign
* Name
* Frequency
* Rating
* Sector File

All the above are string values.  

Now my question is how do I store that specific information in an array?  I could define a user type but how do I get that to work with the array?  I want to be able to display the data in the array on a column based list box if applicable.  I also need to be able to easily remove users from the array (by callsign) if they disconnect.

Any help on how I can best achieve the above would be much appreciated.

Regards,

Ady
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Question by:Ady Foot
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Nightman earned 500 total points
ID: 17781444
Why not work with a class (i.e. user class) and collection.

Public NotInheritable Class User
  Private m_name As String
  Private m_callsign As String
  Private m_frequency As String
  Private m_rating As String
  Private m_sectorFile As String

  Public Sub New(ByVal Name As String)
    m_name = Name
  End Sub

  Public Property Callsign() As String
    Get
      Return m_callsign
    End Get
    Set(ByVal Value As String)
      If m_callsign <> Value Then
        m_callsign = Value
      End If
    End Set
  End Property

  Public ReadOnly Property Name() As String
    Get
      Return m_name
    End Get
  End Property
End Class

Then you create a collection of users
Dim oUser As User
Dim oCol As Collection
oCol = New Collection
oUser = New User("afoot")
oCol.Add(oUser, oUser.Name)

'To Update a setting
oCol.Item("afoot").Callsign = "test"

'To Test that your value has been set correctly
Dim xCallsign As String = oCol.Item("afoot").Callsign
'To Remove
oCol.Remove("afoot")

This is definitely easier to work with. I have only provided the Constructor, the Name Property (readonly) and the Callsign Property - you could easily fill in the rest
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