I have an enum that I'd like to display all possible values of. Is there a way to get an array or list of all the possible values of the enum instead of manually creating such a list? e.g. If I have an enum:
public enum Enumnum { TypeA, TypeB, TypeC, TypeD }
how would I be able to get a List<Enumnum> that contains { TypeA, TypeB, TypeC, TypeD }?
This gets you a plain array of the enum values using Enum.GetValues:
var valuesAsArray = Enum.GetValues(typeof(Enumnum));
And this gets you a generic list:
var valuesAsList = Enum.GetValues(typeof(Enumnum)).Cast<Enumnum>().ToList();
Enumnum.GetValues() and Enumnum.GetNames() doesn't exist.
var valuesAsArray = (Enumnum[])Enum.GetValues(typeof(Enumnum));.
Enum.GetValues(typeof(Enumnum)).Cast<ActualType>().ToList();
ActualType mean? For an enum, it would be Enumnum in the OP's example, or it could be the underlying type (usually int). Did you have anything else in mind?
Try this code:
Enum.GetNames(typeof(Enumnum));
This return a string[] with all the enum names of the chosen enum.
This is way easier now with the generic method in .NET 5.0.
ColorEnum[] colors = Enum.GetValues<ColorEnum>();
Enum.GetValues(typeof(Enumnum));
returns an array of the values in the Enum.
You may want to do like this:
public enum Enumnum {
TypeA = 11,
TypeB = 22,
TypeC = 33,
TypeD = 44
}
All int values of this enum is 11,22,33,44.
You can get these values by this:
var enumsValues = Enum.GetValues(typeof(Enumnum)).Cast<Enumnum>().ToList().Select(e => (int)e);
string.Join(",", enumsValues) is 11,22,33,44.
You can use
Enum.GetValues(typeof(SomeEnum)).Cast<SomeEnum>().ToArray();
This returns an array!
Something little different:
typeof(SomeEnum).GetEnumValues();
If you prefer a more generic way, here it is. You can add up more converters as per your need.
public static class EnumConverter
{
public static string[] ToNameArray<T>()
{
return Enum.GetNames(typeof(T)).ToArray();
}
public static Array ToValueArray<T>()
{
return Enum.GetValues(typeof(T));
}
public static List<T> ToListOfValues<T>()
{
return Enum.GetValues(typeof(T)).Cast<T>().ToList();
}
public static IEnumerable<T> ToEnumerable<T>()
{
return (T[])Enum.GetValues(typeof(T));
}
}
Sample Implementations :
string[] roles = EnumConverter.ToStringArray<ePermittedRoles>();
List<ePermittedRoles> roles2 = EnumConverter.ToListOfValues<ePermittedRoles>();
Array data = EnumConverter.ToValueArray<ePermittedRoles>();
with this:
string[] myArray = Enum.GetNames(typeof(Enumnum));and you can access values array like so:
Array myArray = Enum.GetValues(typeof(Enumnum));
The OP asked for How to get an array of all enum values in C# ?
What if you want to get an array of selected enum values in C# ?
Your Enum
enum WeekDays
{
Sunday,
Monday,
Tuesday
}
If you want to just select Sunday from your Enum.
WeekDays[] weekDaysArray1 = new WeekDays[] { WeekDays.Sunday };
WeekDays[] weekDaysArray2 = Enum.GetValues(typeof(WeekDays)).Cast<WeekDays>().Where
(x => x == WeekDays.Sunday).ToArray();
Credits goes to knowledgeable tl.
References:
Hope helps someone.
also you can use
var enumAsJson=typeof(SomeEnum).Name + ":[" + string.Join(",", Enum.GetValues(typeof(SomeEnum)).Cast<SomeEnum>().Select(e => e.ToString())) + "]";
for get all elements in enum as json format.
