Doubt In Interface ?

Hi,

1. How do we use Interface in real time scenario. 

Interface is used basically where we don't want our client to know about the changes proposed. Interface creates a layer where you can add new functionality without doing much code change in client.


2.How to assign Interface for a given Class?

below is the interface which is returning the brand name and accepting car id as a parameter.


Interface Icar
{
   string GetCarDetail(int Carid)
}


Interface IBike
{
   string GetBikeDetail(int Carid)
}


Implementation

public class car :Icar
{
 
}

3. How to inherit two Interface in a class?

Public Class Vehicle :Icar,IBike

{

}

4. Why do we use interface instead of creating object for a class and using in another class?

Abstraction can be achieved by doing this.

Thanks

 

Hi Survan,

Firstly i will tell you why we use interface.
(1):- Interface allows us to develop loosely  coupled system.
(2) :- Interface are very useful for dependency Injection.
(3) :- Interface makes unit testing & mocking easier.

 interface can't have implementation for any of its method.There is no access modifiers.

 declaring Interface

Public interface interfacename
// interface members
int id;
char Id;

How to inherit two Interface in a class

public interface ITest {     void Test(); } public interface ITest2 {     void Test(); } public class Dual : ITest, ITest2 {     void ITest.Test() {         Console.WriteLine("ITest.Test");     }     void ITest2.Test() {         Console.WriteLine("ITest2.Test");     } }

Hi Suren
 
  1.  we can useinterface like this:-
 
interface IOurDevices { void connectToDevice(); }
2.to assign interface to class just inherit interface class and define the method:-
 
class USBDevice : IOurDevices
{

void connectToDevice() { connectionState = "connected"; }}


3.class USBDevice : IOurDevices,GenericDevice
{
  //define ur methods
}


4.for security reasons we use interface beacause we can't create an object of
  interface so there is no communication at runtime.

Hi,
1. How do we use Interface in real time scenario.
2. How to assign Interface for a given Class?
    Answer for both the question is Here, the real time usage of interface in Log4Net.

3. How to inherit two Interface in a class?
    You can do like, public class C : A, B // A & B are interfaces here
4. Why do we use interface instead of creating object for a class and using in another class?
    As mentioned in the answer 1 & 2, interface is just a contract which should be implemented in the Class which is to be initiated.