I Hv A Private Constructor Can I Use Method Out Side The Class An How...?

Question

1.00/5 (1 vote)

See more:

C#

i m fresher i m seeking many time from this question in interview

Posted 6-Feb-14 4:47am

Gajendra Jangid Gazzu

Add a Solution

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Pete O'Hanlon · Answer 1 · 2014-02-06T05:08:00

The only real way to instantiate a private constructor is from inside the class itself. It's common to see this being misused as a way to achieve a singleton pattern by doing something like this:

C#

public class MyFactory
{
  private int _threadCount;
  private static MyFactory _instance;
  private MyFactory()
  {
    _threadCount = 10;
  }
  public static MyFactory Instance
  {
    get
    {
      if (_instance == null)
      {
        // As this belongs to the same object, we can
        // new it up here.
        _instance = new MyFactory();
      }
      return _instance;
    }
  }
}

Sandeep Singh Shekhawat · Answer 2 · 2014-02-06T05:32:00

I am giving a example that calls method of class that class has private constructor.

1. Create a class that has private constructor

C#

using System;

namespace SingletonExample
{
   public  class User
    {
       private static User user = null;
       private static readonly object padlock = new object();
       private User()
       {
       }

       public static User GetInstance()
       {
           lock (padlock)
           {
               if (user == null)
               {
                   user = new User();
               }
               return user;
           }
       }

       public void GetMessage()
       {
           Console.WriteLine("I am method of class user");
       }

    }
}

2. call the method in execution program

C#

using System;

namespace SingletonExample
{
    class Program
    {
        static void Main(string[] args)
        {
            User user = User.GetInstance();
            user.GetMessage();
            Console.ReadKey();
        }
    }
}

If you want to know more then read this

http://csharpindepth.com/articles/general/singleton.aspx[^]

OriginalGriff · Answer 3 · 2014-02-06T04:59:00

Solution 1

See wiki: Singleton Pattern[^]

Posted 6-Feb-14 4:59am

OriginalGriff

I Hv A Private Constructor Can I Use Method Out Side The Class An How...?

3 solutions

Solution 2

Solution 3

Solution 1

Add your solution here

Preview 0