Question

Hi before going to direct problem let me show my code :

//Definition of enum
public enum LogType
{
    Warning = -2,
    Error = -1,
    Info = 0,
    EruCtorDtor = 1,
    Notifications = 2,
    CommunicationWithAOT = 4,
    ExecutedOrder = 8,
    ERUInfo = 16,
    DebugLog = 32,
}

//Use of enum
CurrentLogFlagSettings = nLogFlag;
LogFlagMap = new SortedDictionary<LogType, int>();

ulong mask = 1;
while(mask <= nLogFlag)
{
     if ((nLogFlag & mask) == mask)
     {
          LogType type = (LogType)mask;  //Step 1
          string val = type.ToString(); //Step 2
          //Processing the value
          LogFlagMap.Add(type, tempVal)
          LogMsg(val + " added", type);
      }
      mask <<= 1;
 }

What I want is : Process step2 only after step1 has produced valid value. I mean value should be between range defined in enum definition. Otherwise I dont want to process it.
for e.g.

1. case 1 – Lets say mask value is 32,
   its defined in enum. So type is
   getting value DebugLog and so it
   type.ToString() (i.e. “DebugLog”),
   this is a valid case.
2. case 2- Lets
   say mask value is 128 and its not
   defined in enum, in this case I dont
   want to process anything on 128
   value. But what is happening its
   geting value 128 in type and
   type.ToString() is converting it
   into 128. I dont want this, I want
   to make sure whether 128 belongs to
   enum values or not.

I want to prevent 2nd case to be executed. Is there any solution for my problem?

Please let me know if more details are needed.

Answer 1

You could use Enum.IsDefined, like so:

int value = 128;
Console.WriteLine(Enum.IsDefined(typeof(LogType), value)); // will print out False