Structure can implement interface

When you implement an interface explicitly, you can access interface members only through the instance of an interface type.

In the above example, file1 object can only access members of IFile , and file2 can only access members of FileInfo class. This is the limitation of explicit implementation.

A class or struct can implement multiple interfaces. It must provide the implementation of all the members of all interfaces. It is recommended to implement interfaces explicitly when implementing multiple interfaces to avoid confusion and more readability. C ASP.

Skill Tests ASP. Example: Invalid Interface with Access Modifiers. Example: Invalid Interface with Implementation. Example: Interface Implementation. Interface members must be implemented with the public modifier; otherwise, the compiler will give compile-time errors.

ReadFile ; file1. WriteFile "content" ; file2. ReadFile ; file2. Try it. Do not use public modifier with an explicit implementation. It will give a compile-time error. The purpose of interfaces is to allow the computer to enforce these properties and to know that an object of TYPE T whatever the interface is must have functions called X,Y,Z, etc. For example, say we have a car class and a scooter class and a truck class.

An interface has a very simple syntax that looks very much like a class definition Interfaces are placed in their own files which have the same name as the interface are Capitalized and end with the familiar language extension e. The following interface would be placed in a "Vehicle. Here is an example of the Vehicle interface referred to above only a partial definition.

An interface is about actions that are allowed, not about data or implementation of those actions. The keyword public is not placed in front of the function prototypes. By definition, all functions listed in an interface must be public functions. There is no code after the function prototype. To tell the computer that a new class that you are writing will fulfill all the requirements implement all the functions of an interface, you must use the keyword implements in the same location where you can use the keyword extends.

Remember: While all functions in the interface must be implemented in the class, you can also create any other functions you want for that class.

What is the power of the interface? The power is that once we have a number of classes which implement the interface, from some point of view, they are equivalent. For example, say we want to create a Car and a Truck, but all our program wants to do is "start" them and "drive" them. PoorEnglish 6-Sep Paramecium13 3-Sep Go to top. Layout: fixed fluid. Article Copyright by lincoln. United States. First Prev Next. Pass as ref? Could you pass the struct as a reference?

And if so how would that get along with the class type? Re: Pass as ref? Try it out, and tell us.