Working with Enum, Enumerated types, Enums, Enum tips

Whenever I work with Enums I find myself googling for the implementation details (aka, “command syntax”). Handling of Enums have improved in recent years, eliminating a lot of copy-n-paste hardcoding. In particular, it’s easy to get meta-level Enum information in C# / .Net. I don’t work with Enums frequently enough to store this knowledge in quick-access storage, and googling the details repeatedly wastes time.  For future reference, my Enum tips:

Given this enum:

private enum FieldIDs {

SerialNumber,

FromPartNumber,

FromEngineeringRevision,

EndItemShopOrder,

ToPartNumber,

ToEngineeringRevision

}

Get the numeric value of an enum:

int serialNumberVal = (int)FieldIDs.SerialNumber; //”1″

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string serialNumberValName = FieldIDs.SerialNumber.ToString(); //”SerialNumber”

 Translate a value or string representation to an enum:

string selectedField = “SerialNumber”;

FieldIDs fi = (FieldIDs)Enum.Parse(typeof(FieldIDs), “SerialNumber”);

Count of values of an enum:

int enumLEDCount = Enum.GetValues(typeof(FieldIDs)).Length;

Check whether a string is present in the Enum:

bool validField = Enum.IsDefined(typeof(FieldIDs), “SerialNumber”);

List all string representations of the Enum:

string[] fieldNames;

Enum.GetNames(typeof(FieldIDs)).CopyTo(fieldNames);

Finally, another tip for Enums is that you can use the switch() code snippet to quickly create explicit switch() cases for all values of the enum. Nice, Microsoft!