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This article mainly shows you the "VB.NET interface development and application skills", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "what are the VB.NET interface development and application skills" this article.

VB.NET interface

VB allows us to create projects with multiple interfaces. To do this, we can use the Implements keyword. When the class is about to execute a new interface, we need to write code to execute each method on the interface. When inheritance provides a change, we may also want to execute multiple interfaces in our object. VB.NET saves the Implements keyword, which improves the concept of the interface and is much simpler than VB6.

How to deal with the interface

VB.NET enters a formal structure to define the interface. It changes the syntax used in the class to execute the interface, making the code more intuitive and clear.

VB.NET interface declaration

The most intuitive improvement is the introduction of a formal syntax for the declaration interface, which uses the Interface keyword, as follows:

Public Interface MyInterface

Event MyEvent ()

Sub MyMethod ()

Function MyFunction (ByVal

Param1 As Integer) As Integer

Property MyProperty () As String

End Interface

This approach is more formal than VB6's. It can declare not only subfunctions, functions, and property methods, but also events as part of the interface.

Overload method

Methods (subfunctions or functions) can be declared using the Overloads keyword. The guidelines for overloading are the same as those in previous tutorials. Each overloaded declaration must have a special list of parameters, depending on the data type of the parameter.

The following example formally uses the overload method to declare a VB.NET interface:

Public Interface MyInterface

Overloads Sub MyMethod ()

Overloads Sub MyMethod (Data As String)

Overloads Function MyFunction

(ByVal Param1 As Integer) As Integer

Overloads Function MyFunction

(ByVal Param1 As Single) As Integer

End Interface

When a class uses the Implement keyword to execute a VB.NET interface that leverages overloaded methods, the class must execute every overloaded method declaration.

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