Difference Between Interface and Abstract Class in VB.NET

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Home » VB.NET » VISUAL BASIC 10 CATEGORIES Difference Between Interface And Abstract Class In VB.NET ACTIVE DIRECTOTRY IN VB.NET Posted in VB.NET | VISUAL BASIC 10 on November 06, 2012 ALGORITHMS AND VB.NET Tags: Interface, Abstract class, VB.NET, Visual Studio 2010 ARRAY IN VB.NET In this article we will learn What is the difference between interface and abstract class in VB.NET ASP.NET AJAX IN VB.NET 7758 ASP.NET USING VB.NET ASSEMBLIES IN VB.NET In this article we will learn What is the difference between interface and abstract class in VB.NET. COM INTEROP IN VB.NET Interfaces:- CRYPTOGRAPHY IN VB.NET 1. A user defined data type similar to class but contains all abstract methods. CRYSTAL REPORTS IN VB.NET 2. All methods are abstract and public by default. DATABASE & DBA 3. All such methods are overridden in child class. 4. Allows to implement the multiple inheritance. DEPLOYMENT IN VB.NET 5. A class can inherit only one other class but any number of interfaces. 6. All interfaces in .NET starts with I. DESIGN & ARCHITECTURE 7. implements keyword to implement the interface. DIRECTX WITH VB.NET 8. use the Interface keyword to create an interface. ENTERPRISE DEVELOPMENT The following code demonstrates the use of interface. FILE IN VB.NET Module Module1 GAMES IN VB.NET Interface Common Sub Leaves() GDI+ IN VB.NET End Interface Interface IHr GENERAL Inherits Common LINQ WITH VB.NET Sub ShowSalary() End Interface MOBILE DEV IN VB.NET Interface IFinance Inherits Common MULTITHREADING IN VB.NET Sub Budget() NETWORKIN WITH VB.NET End Interface Class ERP OFFICE AND VB.NET Implements IHr Implements IFinance PRINTING IN VB.NET Public Sub ShowSalary() Implements IHr.ShowSalary REMOTING IN VB.NET System.Console.WriteLine("Salary will be on 10th") End Sub REPORTS IN VB.NET Public Sub Budget() Implements IFinance.Budget System.Console.WriteLine("Budget is 10 L") SECURITY IN VB.NET End Sub SILVERLIGHT USING VB.NET Public Sub Leaves() Implements Common.Leaves System.Console.WriteLine("Leaves are 10 Cs, 20 EL") SPEECH IN VB.NET End Sub End Class STRING IN VB.NET TABLET PC Class ITC Public Shared Sub Main() VB.NET ADO.NET Dim h As IHr = New ERP() h.ShowSalary() VB.NET ARTICLE h.Leaves() VB.NET EXCEPTION HANDLING End Sub End Class VB.NET FAQ End Module VB.NET HOW DO I

The mustinherit keyword is used to create abstract classes in VB.NET. VB.NET LANGUAGE Abstract Class VB.NET TUTORIALS An abstract class is a special kind of class that cannot be instantiated. So the question is why we need a class that cannot be VB.NET WINDOWS SERVICES instantiated? An abstract class is only to be sub-classed (inherited from). In other words, it only allows other classes to VBA inherit from it but cannot be instantiated. The advantage is that it enforces certain hierarchies for all the subclasses. In simple words, it is a kind of contract that forces all the subclasses to carry on the same hierarchies or standards. VISUAL BASIC 10 Example VISUAL BASIC LANGUAGE Module Module1 WCF WITH VB.NET Public MustInherit Class AbstractClass WEB CONTROL IN VB.NET Public MustOverride Function Add() As Integer Public MustOverride Function Mul() As Integer WEB DEV IN VB.NET End Class

converted by Web2PDFConvert.com WEB FORM WITH VB.NET Public Class AbstractOne Inherits AbstractClass WEB SERVICES IN VB.NET Dim i As Integer = 20 Dim j As Integer = 30 WINDOWS CONTROLS WINDOWS FORMS IN VB.NET Public Overrides Function Add() As Integer Return i + j WORKFLOW IN VB.NET End Function Public Overrides Function Mul() As Integer WPF IN VB.NET Return i * j XAML IN VB.NET End Function End Class XML IN VB.NET

Sub Main() Dim abs As New AbstractOne() MORE ARTICLES WriteLine("Sum is" & " " & abs.Add()) WriteLine("Multiplication is" & " " & abs.Mul()) Setup For A Windows Forms Application Using Visual Read() Studio 2010 In VB.NET End Sub How To Check Installed .NET Versions On Hosting End Module Server In VB.NET

TabControl In A Windows Forms Application In Visual Difference between interface and abstract class in VB.NET. Studio 2010 In VB.NET These are some differences between abstract class and interfaces. Xml Database In Windows Forms Application Using 1. An abstract class may contain complete or incomplete methods. Interfaces can contain only the signature of a Visual Studio 2010 In VB.NET method but no body. Thus an abstract class can implement methods but an interface can not implement methods. Date And Time In Window Application In VB.NET 2. An abstract class can contain fields,constructors, or destructors and implement properties. An interface can not contain fields, constructors, or destructors and it has only the property's signature but no implementation. ListBox Behavior In VB.NET Use Of ThreeState Property With CheckBox In VB.NET 3. An abstract class cannot support multiple inheritance, but an interface can support multiple inheritance. Thus a class may inherit several interfaces but only one abstract class. Difference Between Interface And Abstract Class In VB.NET 4. A class implementing an interface has to implement all the methods of the interface, but the same is not required in the case of an abstract Class. Type Conversion In Calculation In VB.NET

5. Various access modifiers such as abstract, protected, internal, public, virtual, etc. are useful in abstract Classes but String Class In VB.NET- String.Compare Method not in interfaces. Enumertors In VB.NET 6. Abstract classes are faster than interfaces. How To Use IDisposable Interface In VB.NET How To Use IDisposable Interface In VB.NET RELATED ARTICLES Structure In VB.NET Abstract class in VB.NET Abstract Classes in Visual Basic .NET ICloneable Interface In VB.NET Abstract classes in VB.NET MustInherit in VB.NET Conversion Classes & CultureInfo Class in VB.NET How to Re-Implement interfaces in VB.NET Overriding In VB.NET Structure in VB.NET ICloneable interface in VB.NET Use Indexer In VB.NET Difference between two dates in VB.NET Structures in Visual Basic .NET How To Change The Console Display In VB.NET Reflection In VB.NET Method Parameter Types In VB.NET How To Sort And Reverse Of Array In VB.NET Pass By Value And Pass By Reference In VB.NET Use Of IndexOf-Array In VB.NET Authentication And Code Groups In VB.NET Collections In VB.NET Use Of LowerBound And UpperBound With Array In VB.NET Interface In VB.NET Use Of CreateInstance Method To Construct An Array In VB.NET HelpProvider Control In VB.NET How To Clone An Array In VB.NET Registry.GetValue In VB.NET Use The Err.Number In VB.NET How To Use Activator In VB.NET Use Of RegistryKeys In VB.NET Use ControlChars.Lf In VB.NET Visual Studio 2010 ErrorProvider Control In VB.NET

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