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Member Property (Delphi and VB.Net Cross Reference Guide)

By Mike Prestwood

Delphi versus VB.Net: A side by side comparison between Delphi and VB.Net.

 
OOP Basics
 

Some languages support object-based concepts such as Paradox, Access, and VB Classic. Other languages have OO extensions and fully support object orientation in a hybrid fashion (such as C++ and Dephi for Win32). Finally, some lanages such as C#, VB.Net, Prism, and Java are entirely written in OO. Meaning, every line of code written must occur within a class).

Member Property

[Other Languages] 
Delphi:   property..read..write

Delphi uses a special property keyword to both get and set the values of properties. The read and write keywords are used to get and set the value of the property directly or through an accessor method. For a read-only property, leave out the write portion of the declaration.

You can give properties any visibility you wish (private, protected, etc). It is common in Delphi to start member fields with "F" ("FName" in our example) and drop the "F" with properties that manage member fields ("Name" in our example).

Syntax Example:
TCyborg = class(TObject)
private
  FCName: String;
public
  property CyborgName: String read FCName write FCName;
end;
VB.Net:   property, get, set

VB.Net uses a special property keyword along with special get and set methods to both get and set the values of properties. For a read-only property, leave out the set method. The value keyword is used to refer to the member field. Properties can make use of any of the access modifiers (private, protected, etc).

My preference for VB.Net code is to start member fields with "F" ("FName" in our example) and drop the "F" with properties that manage member fields ("Name" in our example).

Syntax Example:
Public Class Cyborg
Private FCyborgName As String
 
  Public Property CyborgName()
Get
Return F
CyborgName
End Get
 
Set(ByVal value)
F
CyborgName = value
End Set
End Property
End Class












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