C# Enum HasFlag

Description

Enum HasFlag determines whether one or more bit fields are set in the current instance.

Syntax

Enum.HasFlag has the following syntax.


public bool HasFlag(
  Enum flag
)

Parameters

Enum.HasFlag has the following parameters.

flag - An enumeration value.

Returns

Enum.HasFlag method returns true if the bit field or bit fields that are set in flag are also set in the current instance; otherwise, false.

Example

Call HasFlag only if the underlying value of flag is non-zero.


//from w  w w  .  j a  va2 s  .c om
using System;

[Flags] 
public enum Pet {
   None = 0,
   Dog = 1,
   Cat = 2,
   Bird = 4,
   Rabbit = 8,
   Other = 16
}

public class Example
{
   public static void Main()
   {
      Pet[] petsInFamilies = { Pet.None, Pet.Dog | Pet.Cat, Pet.Dog };

      foreach (Pet petsInFamily in petsInFamilies)
      {
         if (petsInFamily.Equals(Pet.None))
            Console.WriteLine("None"); 
         else if (petsInFamily.HasFlag(Pet.Dog))
            Console.WriteLine("Dog");   
      }
        
      
   }
}

The code above generates the following result.