How to check If a Enum contain a number?

Question

I have a Enum like this:

 public enum PromotionTypes {     Unspecified = 0,      InternalEvent = 1,     ExternalEvent = 2,     GeneralMailing = 3,       VisitBased = 4,     PlayerIntroduction = 5,     Hospitality = 6 } 

I want to check if this Enum contain a number I give. For example: When I give 4, Enum contain that, So I want to return True, If I give 7, There isn't 7 in this Enum, So it returns False. I tried Enum.IsDefine but it only check the String value. How can I do that?

Answer 1

The IsDefined method requires two parameters. The first parameter is the type of the enumeration to be checked. This type is usually obtained using a typeof expression. The second parameter is defined as a basic object. It is used to specify either the integer value or a string containing the name of the constant to find. The return value is a Boolean that is true if the value exists and false if it does not.

enum Status {     OK = 0,     Warning = 64,     Error = 256 }  static void Main(string[] args) {     bool exists;      // Testing for Integer Values     exists = Enum.IsDefined(typeof(Status), 0);     // exists = true     exists = Enum.IsDefined(typeof(Status), 1);     // exists = false      // Testing for Constant Names     exists = Enum.IsDefined(typeof(Status), "OK");      // exists = true     exists = Enum.IsDefined(typeof(Status), "NotOK");   // exists = false } 

SOURCE

Answer 2

Try this:

IEnumerable<int> values = Enum.GetValues(typeof(PromotionTypes))                               .OfType<PromotionTypes>()                               .Select(s => (int)s); if(values.Contains(yournumber)) {       //... }