One is to create a separate method for initialization. In VB6, there are two workarounds for this type of problem.
#VISUAL BASIC NET CONSTRUCTOR CODE#
By using a constructor, I can ensure that any client code that tries to create an instance of clsTransaction will not compile unless it passes a valid type to the class. My clsTransaction, for instance, must have a type. What is so good about this? Some objects are simply not valid unless they are initialized with some data. Here, the object is created and initialized in the same line. Set oTransaction = New clsTransaction(TYPE_CREDIT) In VB7, I will be able to write a line such as the following (in the example, TYPE_CREDIT is a value from an enumeration in the class). To be valid, an instance of this class must have a transaction type (such as sale or credit). In other words, they allow a new object to be created and initialized in a single expression.Īs an example, I am working on a project that has a class called clsTransaction.
ConstructorsĬonstructors allow you to create a new instance of a class while simultaneously passing arguments to the new instance. Instructions: Copy the declarations and code below and paste directly into your VB project. This is Part 4 of 5 mini-articles that were originally published in the newsletter language enhancements in Visual Basic.NET.
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