Member
Please let me know the differences and similarity between a class and a structure in VB.NET. This is because classes and structure has almost the same meaning but I think there would be some major points on the basis of which it would be differentiated.
Member
A struct cannot inherit from another struct or class, and it cannot be the base of a class. They are user-defined and provide a method for packing together data of different types. There is no inheritance for structs as there is for classes. Structures can be defined as a tool for handling a group of logically related data items. Structs, however, inherit from the base class Object. Both can have constructors, methods, properties , fields, constants , enumerations, events and event handlers. A struct can implement interfaces, and it does that exactly as classes do. Structure and class can implement interface.
Member
Structures are implicitly derived from a class called System.ValueType. The purpose of System.ValueType is to override the virtual methods defined by System.Object. When we create a struct object using the new operator, it gets created and the appropriate constructor is called. Both of them can have constructor without parameter and with parameter. Now VB.NET is object-oriented language. The following are some of the differences: Data Type Changes
Member
A Class has many uses in the object oriented environment of programming. One of its major advantages is that it can act as a blueprint for a new program you are about to write. When the runtime encounters a type derived from System.ValueType, then stack allocation is achieved. A Structure on the other hand deals with the data-type issue. if you are writing a job application program, you will need different types of data. It is an error to declare a default (parameterless) constructor for a struct. A default constructor is always provided to initialize the struct members to their default values.
Posting Permissions
Reply With Quote
Bookmarks