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CODE SNIPPETS IN VISUAL STUDIO

uk365guy
CODE SNIPPET TYPES

Expansion : These snippets allows the code snippet to be inserted at the cursor.

SurroundsWith: These snippets allows the code snippets to be placed around a selected piece of code

Refactoring: These snippets are used during code refactoring.

Control K X for intellesense in visual studio

right click in visual studio program and select the insert snippets > visual c# > for loop

CODE SNIPPET MANAGER

Tool > code snippet manager

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HOW TO MAKE METHOD PARAMETERS OPTIONAL IN C#

uk365guy

OPTIONAL PARAMETERS

FOUR WAYS

1) Use parameter arrays
2) Method overloading
3) Specify parameter defaults
4) Use OptionalAttribute that is present in System.Runtime.InteropService namespace


1)Use parameter arrays


using System;
using System.Text;
namespace ConsoleApplication4
{
    public class MainClass
    {
        public static void Main()
        {
            AddNumber(10, 20 new object[] {30,50,40});
        }

        public static void AddNumber(int firstNumber, int SecondNumber, params object[] restofNumbers)
        {
            int result = firstNumber + SecondNumber;
            if(restofNumbers != null)
            {
                foreach(int i in restofNumbers)
                {
                    result += i;
                }
            }
            Console.WriteLine(“Sum = ” + result);
            Console.ReadLine();
        }

    }

}


   

2) Making method parameters optional using Method overloading 


using System;
using System.Text;
namespace ConsoleApplication4
{
    public class MainClass
    {
        public static void Main()
        {
            AddNumber(10, 20, new int[] {30,40});
        }
// over loading method
      public static void AddNumber(int firstNumber, int SecondNumber)
        {
            AddNumber(firstNumber, SecondNumber, null);
        }
       

        public static void AddNumber(int firstNumber, int SecondNumber, params int[] restofNumbers)
        {
            int result = firstNumber + SecondNumber;
            if(restofNumbers != null)
            {
                foreach(int i in restofNumbers)
                {
                    result += i;
                }
            }
            Console.WriteLine(“Sum = ” + result);
            Console.ReadLine();
        }

    }

}

3) Specify parameter defaults


using System;
using System.Text;
namespace ConsoleApplication4
{
    public class MainClass
    {
        public static void Main()
        {
            AddNumber(10, 20, new int[] {30,40});
        }

        // optional parameters appears after all the parameters
     
        public static void AddNumber(int firstNumber, int SecondNumber,  int[] restofNumbers = null)
        {
            int result = firstNumber + SecondNumber;
            if(restofNumbers != null)
            {
                foreach(int i in restofNumbers)
                {
                    result += i;
                }
            }
            Console.WriteLine(“Sum = ” + result);
            Console.ReadLine();
        }

    }

}


   NAMED PARAMETERS

using System;
using System.Text;
namespace ConsoleApplication4
{
    public class MainClass
    {
        public static void Main()
        {
            Test(1,c:20);
        }

        // optional parameters appears after all the parameters

        public static void Test(int a, int b = 10, int c = 20)
        {
            Console.WriteLine(“a = ” + a);
            Console.WriteLine(“b = ” + b);
            Console.WriteLine(“c = ” + c);
            Console.ReadLine();
        }

    }

}

 4)  Making Method parameters optional by using OptionalAttributes


using System;
using System.Text;
using System.Collections.Generic;
using System.Runtime.InteropServices;
namespace ConsoleApplication4
{
    public class MainClass
    {
        public static void Main()
        {
            AddNumber(10, 20);
        }
        
        public static void AddNumber(int firstNumber, int SecondNumber,[Optional] int[] restofNumbers)
        {
            int result = firstNumber + SecondNumber;
            if (restofNumbers != null)
            {
                foreach (int i in restofNumbers)
                {
                    result += i;
                }
            }
            Console.WriteLine(“Sum = ” + result);
            Console.ReadLine();
        }
    }
}
   


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WHAT ARE PARTIAL CLASSES

uk365guy

WHAT ARE PARTIAL CLASSES

what are partial classes?
what are the advantages or uses of partial classes?
where are partail classes used?
Partial classes allows us to split class into 2 or more files. All these parts are then combined into a single class, when the application is compiled. the partial keyword can also be used to split a struct or an interface over two or more files.

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