CODEWITHSUNDEEP
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Bluscream
Bluscream

Reputation: 253

Get Next item in Enum and return first if last+1

I saw How to get next (or previous) enum value in C# and was wondering if that could also return the first item if the next item would be (last+1). So imagine:

public enum MODE {
    OFF,
    CHANNEL,
    TALKING
}

MODE Mode = MODE.OFF;

Mode = Mode.Next(); // should give me MODE.CHANNEL
Mode = Mode.Next(); // should give me MODE.TALKING
Mode = Mode.Next(); // should give me MODE.OFF

Upvotes: 1

Views: 1989

Answers (2)

Moises Quintero
Moises Quintero

Reputation: 76

Maybe this could be useful:

    static void Main(string[] args)
    {
        MODE Mode = MODE.TALKING; //Whatever value;
        int index = (int)Mode;
        index = ++index % 3;
        Mode = (MODE)index;
        Console.WriteLine("Mode value {0} ; index {1}", Mode, index );
        Console.ReadKey();

    }

Upvotes: 0

Dmitrii Bychenko
Dmitrii Bychenko

Reputation: 186698

Add modulo arithmetics to husayt's answer

How to get next (or previous) enum value in C#

Code:

public static class Extensions {
  public static T Next<T>(this T src) where T : struct {
    if (!typeof(T).IsEnum)
      throw new ArgumentException(String.Format("Argument {0} is not an Enum", 
                                                 typeof(T).FullName));

    T[] Arr = (T[])Enum.GetValues(src.GetType());

    int j = (Array.IndexOf<T>(Arr, src) + 1) % Arr.Length; // <- Modulo % Arr.Length added

    return Arr[j];
  }
}

Upvotes: 2

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