Cerebrus I have small doubt
String hob=mp2("Hobbies")
which string will return Hobbies property?
because your hobbies property more then one
2009/3/1 Cerebrus <[email protected]>
>
> I believe that the answer depends on what you mean by "the User". If
> you mean another developer who will be using your class, then all the
> previous answers work well and you can ignore the rest of my post.
> Inheritance or extension methods may be a good solution.
>
> But if you mean an end user who is going to use your application, then
> the best way would be to expose a collection of name-value pairs. For
> example, you could have a NameValueCollection object exposed by a
> public property called "AdditionalInfo".
> ---
> Imports System.Collections.Specialized
>
> Public Class Person
>
> Private id As String
> Private moreInfo As NameValueCollection
>
> 'Constructor
> Public Sub New(ByVal uniqueID As String)
> 'Other class initialization.
> id = uniqueID
> moreInfo = New NameValueCollection()
> End Sub
>
> Default Public Property AdditionalInfo(ByVal key As String) As
> String
> Get
> Return moreInfo.Get(key)
> End Get
> Set(ByVal value As String)
> moreInfo.Add(key, value)
> End Set
> End Property
>
> Public ReadOnly Property PersonID() As String
> Get
> Return id
> End Get
> End Property
>
> End Class
> ---
> Couple of things to note about the above code:
> 1. I have assumed that the type of data that needs to be saved in
> every possible property is going to be a String. I would have used a
> Generic collection, but I make an exception because - You are a
> beginner and beginners may take some time to get familiar with
> Generics.
>
> 2. Your "hobbies" property will probably have more than one entry so
> I used a NameValueCollection as the base for my property. In case you
> feel that all possible properties entered by the user should only be
> of a single type (let's say, String), then you should probably use a
> StringDictionary (or better still, lean towards a Generic dictionary).
>
>
> Sample usage of this class:
> ---
> Dim mp As New MyClasses.Person("1")
> 'One way of setting the properties
> mp.AdditionalInfo("Name") = "Mr. Smith"
> mp.AdditionalInfo("Address") = "1, Hollywood way, Bollywood"
> mp.AdditionalInfo("TelephoneNumber") = "1-800-MR-SMITH"
> mp.AdditionalInfo("SoftwareVersion") = "0.1"
>
> Dim mp2 As New MyClasses.Person("2")
> 'Another way of setting the properties. Allowed because it's a Default
> Property.
> mp2("Name") = "Mr. Brown"
> mp2("Address") = "1, Bollywood way, Hollywood"
> mp2("TelephoneNumber") = "1-800-MR-BROWN"
> mp2("Hobbies") = "80-ball pool"
> mp2("Hobbies") = "Collecting dust"
> mp2("Hobbies") = "Watching pr0n"
> mp2("website") = "www.mrbrownisborn.com"
> ---
>
> Since this is the end user, You could now build a UI with two
> textboxes, one for the name of the property(eg, Hobbies) and the other
> for the value to set.
>
> On Feb 27, 3:04 pm, Belisario <[email protected]> wrote:
> > Hello everybody!
> >
> > I'm a VB.Net beginner.
> > I'm trying to understand if it's possible to create a class with a
> > method in it to add new properties to this class.
> >
> > Let me put it better: I am building a customer class. This would have
> > some base fixed properties like "Name" or "Address", but I would like
> > to give the user the possibility to build his own free custom
> > property, like "Telephone Number" and "Software version" for Mr. Smith
> > and "Customer hobbies" and "Website" for Mr. Brown.
> > So:
> >
> > Mr. Smith's Customer Object properties:
> > "Name"
> > "Address"
> > "Telephone Number"
> > "Software version"
> >
> > Mr. Brown Customer Object properties:
> > "Name"
> > "Address"
> > "Customer hobbies"
> > "Website"
> >
> > I searched a lot through the net but I still can't understand if this
> > is possible and how. I heard about something called "reflection", but
> > I am still not sure if I am searching the right way...
> >
> > Could you please help me on this point or show me other possible ways
> > to overcome the issue?
> >
> > Thank you very much!
>
--
Regards
*******************
*C.Arun Kumar *
*******************
