Csharp/CSharp Tutorial/Data Structure/Array object

Arrays of Objects

using System;
class Employee
{
    public Employee(string name, float billingRate)
    {
        this.name = name;
        this.billingRate = billingRate;
    }
    
    public float CalculateCharge(float hours)
    {
        return(hours * billingRate);
    }
    
    public string TypeName()
    {
        return("Employee");
    }
    
    private string name;
    protected float billingRate;
}
class Manager: Employee
{
    public Manager(string name, float billingRate) :
    base(name, billingRate)
    {
    }
    
    public new float CalculateCharge(float hours)
    {
        if (hours < 1.0F)
        hours = 1.0F;        // minimum charge.
        return(hours * billingRate);
    }
    
    public new string TypeName()
    {
        return("Civil Employee");
    }
}
class MainClass
{
    public static void Main()
    {
        // create an array of Employees
        Employee[]    earray = new Employee[2];
        earray[0] = new Employee("A", 15.50F);
        earray[1] = new Manager("B", 40F);
        
        Console.WriteLine("{0} charge = {1}",
        earray[0].TypeName(),
        earray[0].CalculateCharge(2F));
        Console.WriteLine("{0} charge = {1}",
        earray[1].TypeName(),
        earray[1].CalculateCharge(0.75F));
    }
}

Employee charge = 31
Employee charge = 30

A two dimensional array of objects

using System;
public class Employee
{
  public string name;
  public int no;
  public Employee(string name,int no)
  {
    this.name = name;
    this.no = no;
  }
}

class MainClass
{
  public static void Main()
  {
    Employee[,,] empArray = new Employee[10, 5, 3];
    empArray[1, 3, 2] = new Employee("S", 3);
    empArray[4, 1, 2] = new Employee("A", 9);
    Console.WriteLine("empArray.Rank (number of dimensions) = " + empArray.Rank);
    Console.WriteLine("empArray.Length (number of elements) = " + empArray.Length);
    for (int x = 0; x < empArray.GetLength(0); x++)
    {
      for (int y = 0; y < empArray.GetLength(1); y++)
      {
        for (int z = 0; z < empArray.GetLength(2); z++)
        {
          if (empArray[x, y, z] != null)
          {
            Console.WriteLine("empArray[" + x + ", " + y + ", " + z +"].name = " + empArray[x, y, z].name);
            Console.WriteLine("empArray[" + x + ", " + y + ", " + z +"].no = " + empArray[x, y, z].no);
          }
        }
      }
    }
  }
}

empArray.Rank (number of dimensions) = 3
empArray.Length (number of elements) = 150
empArray[1, 3, 2].name = S
empArray[1, 3, 2].no = 3
empArray[4, 1, 2].name = A
empArray[4, 1, 2].no = 9

string arrays

using System;
class MainClass
{
  public static void Main()
  {
   
    string[] stringArray = new string[2];
    Console.WriteLine("stringArray[0] = " + stringArray[0]);
    stringArray[0] = "Hello";
    stringArray[1] = "World";
    foreach (string myString in stringArray)
    {
      Console.WriteLine("myString = " + myString);
    }
  }
}

stringArray[0] =
myString = Hello
myString = World

Use object to create a generic array.

using System; 
 
class MainClass {   
  public static void Main() {   
    object[] ga = new object[10]; 
  
    // store ints 
    for(int i=0; i < 3; i++) 
      ga[i] = i; 
  
    // store doubles 
    for(int i=3; i < 6; i++) 
      ga[i] = (double) i / 2;  
 
 
    // store two strings, a bool, and a char 
    ga[6] = "String"; 
    ga[7] = true; 
    ga[8] = "X"; 
    ga[9] = "asdf"; 
 
    for(int i = 0; i < ga.Length; i++) 
      Console.WriteLine("ga[" + i + "]: " + ga[i] + " "); 
 
  }  
}

ga[0]: 0
ga[1]: 1
ga[2]: 2
ga[3]: 1.5
ga[4]: 2
ga[5]: 2.5
ga[6]: String
ga[7]: True
ga[8]: X
ga[9]: asdf

Use the Sort() method to sort the elements in a char array

using System;
class MainClass
{
  public static void Main()
  {
    char[] charArray = {"w", "e", "l", "c", "o", "m", "e"};
    Array.Sort(charArray);  // sort the elements
    Console.WriteLine("Sorted charArray:");
    for (int i = 0; i < charArray.Length; i++)
    {
      Console.WriteLine("charArray[" + i + "] = " +
        charArray[i]);
    }
  }
}

Sorted charArray:
charArray[0] = c
charArray[1] = e
charArray[2] = e
charArray[3] = l
charArray[4] = m
charArray[5] = o
charArray[6] = w