using System; enum EmpType : byte { Manager = 10, Grunt = 1, Contractor = 100, VP = 9 } class Program { static void Main(string[] args) { EmpType fred; fred = EmpType.VP; Array obj = Enum.GetValues(typeof(EmpType)); Console.WriteLine("This enum has {0} members:", obj.Length); } }
Enum.IsDefined()
using System; enum EmpType : byte { Manager = 10, Grunt = 1, Contractor = 100, VP = 9 } class Program { static void Main(string[] args) { EmpType fred; fred = EmpType.VP; // Does EmpType have a SaleEmployee value? if (Enum.IsDefined(typeof(EmpType), "SalesEmployee")) Console.WriteLine("Yep, we have sales people."); else Console.WriteLine("No, we have no profits...."); } }
Enum data type comparison
using System;
enum EmpType : byte {
Manager = 10,
Grunt = 1,
Contractor = 100,
VP = 9
}
class Program {
static void Main(string[] args) {
EmpType Joe = EmpType.VP;
EmpType Fran = EmpType.Grunt;
if (Joe < Fran) Console.WriteLine("Joe's value is less than Fran's value."); else Console.WriteLine("Fran's value is less than Joe's value."); } } [/csharp]
Enumerations: The System.Enum Type 2
/* A Programmer's Introduction to C# (Second Edition) by Eric Gunnerson Publisher: Apress L.P. ISBN: 1-893115-62-3 */ // 20 - EnumerationsThe System.Enum Type // copyright 2000 Eric Gunnerson using System; enum Color { red, green, yellow } public class TheSystemEnumType2 { public static void Main() { Color c = Color.red; // enum values and names foreach (int i in Enum.GetValues(c.GetType())) { Console.WriteLine("Value: {0} ({1})", i, Enum.GetName(c.GetType(), i)); } // or just the names foreach (string s in Enum.GetNames(c.GetType())) { Console.WriteLine("Name: {0}", s); } // enum value from a string, ignore case c = (Color) Enum.Parse(typeof(Color), "Red", true); Console.WriteLine("string value is: {0}", c); // see if a specific value is a defined enum member bool defined = Enum.IsDefined(typeof(Color), 5); Console.WriteLine("5 is a defined value for Color: {0}", defined); } }
Enumerations:The System.Enum Type
using System; enum Color { red, green, yellow } public class TheSystemEnumType1 { public static void Main() { Color c = Color.red; Console.WriteLine("c is {0}", c); } }
Enumerations:Bit Flag Enums 2
enum Values { A = 1, B = 5, C = 3, D = 42 } public class EnumerationsConversions { public static void Main() { Values v = (Values) 2; int ival = (int) v; } }
Enumerations:Bit Flag Enums 1
using System; [Flags] public enum BitValues: uint { NoBits = 0, Bit1 = 0x00000001, Bit2 = 0x00000002, Bit3 = 0x00000004, Bit4 = 0x00000008, Bit5 = 0x00000010, AllBits = 0xFFFFFFFF } public class BitFlagEnums { public static void Member(BitValues value) { // do some processing here } public static void Main() { Member(BitValues.Bit1 | BitValues.Bit2); } }