Thursday, 18 July 2019

Examples Of Csharp


     (1)   Example of Boxing and Un-boxing?
static void Main(string[] args)
            {
            int N = 15;
            // boxing
            object obj = N;
            // unboxing
            int i = (int)obj;
            // Display result
            Console.WriteLine("Value of object is : " + obj);
            Console.WriteLine("Value of i is : " + i);
            Console.ReadLine();
          }

     (2)   Lambda Expression Example?
class StudentList
      {
        public int StudentId { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
        static void Main(string[] args)
        {
            IList<StudentList> studentList = new List<StudentList>()
            {
            new StudentList(){StudentId =1, Name="Anil", Age=20},
            new StudentList() { StudentId = 2, Name = "Ajay", Age = 30 },
            new StudentList() { StudentId = 3, Name = "Boss", Age = 40 },
            new StudentList() { StudentId = 4, Name = "Cag", Age = 50 },
            };
            var Names = studentList.Select(x => x.Name);
            foreach (var Name in Names)
            {
                Console.WriteLine(Name);
            }
            Console.Read();
             }
          }

       (3)   Example of Delegate?

class Program
            {
            delegate int Calculator(int n);
            static int number = 20;
            public static int add(int n)
            {
                number = number + n;
                return number;
            }
            public static int mul(int n)
            {
                number = number * n;
                return number;
            }
            public static int sub(int n)
             {
            number = number - n;
            return number;
              }
       
            public static int getNumber()
            {
                return number;
            }
            public static void Main(string[] args)
            {
                Calculator c1 = new Calculator(add);
                Calculator c2 = new Calculator(mul);
                Calculator c3 = new Calculator(sub);
                c1(20);
                Console.WriteLine("c1 delegate number is: " + getNumber());
                c2(3);
                Console.WriteLine("c2 delegate number is: " + getNumber());
                c3(15);
                Console.WriteLine("c3 delegate number is: " + getNumber());
                Console.ReadLine();
            }
        }

       (4)   Example of Multilevel Inheritance?
class Program
        {
        public class Employee
        {
            public int salary = 40000;
        }
    
        public class Programmer : Employee
        {
            public int bonus = 10000;
        }
        public class developer:Programmer
        {
            public int Hrd = 1200;
        }
      
            static void Main(string[] args)
            {
                developer p1 = new developer();            
                Console.WriteLine("Salary: " + p1.salary);
                Console.WriteLine("bonus: " + p1.bonus);
               Console.WriteLine("Hrd:" + p1.Hrd);             
               Console.ReadLine();
            }       
    }

      (5)   First Duplicate value is a given an array { 3, 6, 9, 7, 1, 9, 5, 7 }?

class Program
       {
        static void Main(string[] args)
        {
            int[] arr = new int[] { 3, 6, 9, 7, 1, 9, 5, 7 };
            PrintFirstDuplicateValue(arr);
            Console.ReadKey();
        }

        private static void PrintFirstDuplicateValue(int[] arr)
        {
           for(int i=0;i<arr.Length-1;i++)
            {
                for(int j=i+1;j<arr.Length;j++)
                {
                    if (arr[i] == arr[j])
                    {
                        Console.WriteLine("First Duplicate Value is:" + arr[i]);
                        return;
                    }
                }
            }
           }
    }

       (6)   Palindrome or Not you can take 6 words?

static void Main(string[] args)
        {
            string[] Strng = { "ANIL", "VASU", "MADAM", "ANJI", "KRISH",
"MALAYALAM"};
           foreach(var str in Strng)
            {
                string revstr = "";
                for(int i=str.Length-1;i>=0;i--)
                {
                    revstr += str[i].ToString();
                }
                if(revstr==str)
                {
                    Console.WriteLine("Palindrome is:{0}",str,revstr);
                }
                else
                {
                    Console.WriteLine("Not a palindrome:{0}",str,revstr);
                }               
            }
            Console.ReadLine();
      }

     
         (7)   CallByRef and CallByOut Example? 

 class RefOut
    {
        static void Main(string[] args)
        {
            int val = 4;//Given to the reference and out
            Refoutclass obj = new Refoutclass();//Instance of class Refoutclass
            obj.Add(ref val); //Called Method1
            Console.WriteLine("Reference Value is:{0}",val);

            obj.Multiplic(out int val1); //Called Method2
            Console.WriteLine("Out Value is:{0}",val1);
            Console.ReadLine();
        }
    }

    class Refoutclass
    {
        public void Add(ref int a) //Calling Method1
        {           
            a += a;         
        }
        public void Multiplic(out int b) //Calling Method2
        {
            //out- to print the multiple values.
            int s = 6; //initializing the value.
            b = s;
            b *= b;   //Method or Logic Execution       
        }
    }
}

     (8)   Remove Duplicate Characters of a strings (“Google”, “Assistant”)?

     class Program
        {
        static void Main()
        {
            string value1 = StringChar("Csharpstar");
            string value2 = StringChar("Assistant ");
            string value3 = StringChar("Google ");
            Console.WriteLine(value1);
            Console.WriteLine(value2);
            Console.WriteLine(value3);
            Console.ReadLine();
        }

        private static string StringChar(string Char)
        {
            string result = "";
            foreach (var value in Char)
                if (result.IndexOf(value) == -1)
                    result += value;
            return result;
        }
    }
  
Remove Duplicate Characters of a strings?

 string[] str = { "Assistant", "Csharpstar", "Google" };
            foreach(var item in str)
            {
                var word = new HashSet<char>(item);
                foreach(var remove in word)
                {
                    Console.Write(remove);
                }
                Console.WriteLine();
            }

            Console.ReadLine();

      (9)   Static Example?

        class MyOffice
       {
        static string officename;
        static string Address;

        static MyOffice()
        {
            officename = "xyz";
            Address = "123";
        }
   
     static void Main(string[] args)
       {
        Console.WriteLine(MyOffice.officename);
        Console.WriteLine(MyOffice.Address);
        Console.ReadKey();
        }
}

      (10)  StreamWriter and StreamReader example?

         class Program
          {
             static void Main(string[] args)
              {   
   
       //Reader Example

            FileStream f = new FileStream("C:\\Desktop\\C# Concept Word\\out.txt", FileMode.OpenOrCreate);
            StreamReader s = new StreamReader(f);
            string line = "";
            while((line=s.ReadLine())!=null)
            {
                Console.WriteLine(line);
            }
            s.Close();
            f.Close();
            Console.ReadLine();              
            }
        }

        public static void WriteToFile()
        {
            FileStream f = new FileStream("C:\\Users\\Desktop\\out.txt", FileMode.Create);
            StreamWriter s = new StreamWriter(f);
            s.WriteLine("Hello Anil");
            s.WriteLine("How r u");
            s.Close();
            f.Close();
            Console.WriteLine("File created successfully...");
            Console.ReadLine(); 
        
            }
        }
    }

       (11) Update indexes of an array int based?

          static void Main(string[] args)
           {
            int[] arr = new int[] { 3, 4, 5 };
            Console.WriteLine("Original array");
            for (int i = 0; i < arr.Length; i++)
            {
                Console.WriteLine(arr[i] + "");
            }
            arr[1] = 5;
            arr[2] = 6;
            Console.WriteLine("Updated");
            for (int i = 0; i < arr.Length; i++)
            {
                Console.WriteLine(arr[i] + "");
            }
            Console.ReadLine();

             Update indexes of an array String based?
            string[] str = { "Ali", "Ajay", "Boss" };
            Console.WriteLine("Original array IS");
            for(int i=0;i<str.Length;i++)
            {
               Console.WriteLine(str[i] + "");
            }
            str[1] ="Krish";
            str[2] = "Vasu";
            Console.WriteLine("Updated Array IS");
            for(int j=0;j<str.Length;j++)
            {
               Console.WriteLine(str[j]+"");
            }
            Console.ReadLine();
        }

at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)