I have an enum construct like this:
public enum EnumDisplayStatus
{
None = 1,
Visible = 2,
Hidden = 3,
MarkedForDeletion = 4
}
In my database, the enumerations are referenced by value. My question is, how can I turn the number representation of the enum back to the string name.
For example, given 2
the result should be Visible
.
nameof(EnumDisplayStatus.Visible)
Hope it helps somebody
var x = MyEnum.Visible; nameof(x)
would produce "x"
, not "Visible"
.
You can convert the int
back to an enumeration member with a simple cast, and then call ToString()
:
int value = GetValueFromDb();
var enumDisplayStatus = (EnumDisplayStatus)value;
string stringValue = enumDisplayStatus.ToString();
If you need to get a string "Visible"
without getting EnumDisplayStatus
instance you can do this:
int dbValue = GetDBValue();
string stringValue = Enum.GetName(typeof(EnumDisplayStatus), dbValue);
Try this:
string m = Enum.GetName(typeof(MyEnumClass), value);
Use this:
string bob = nameof(EnumDisplayStatus.Visible);
The fastest, compile time solution using nameof
expression.
Returns the literal type casing of the enum or in other cases, a class
, struct
, or any kind of variable
(arg, param, local, etc).
public enum MyEnum {
CSV,
Excel
}
string enumAsString = nameof(MyEnum.CSV)
// enumAsString = "CSV"
Note:
You wouldn't want to name an enum in full uppercase, but used to demonstrate the case-sensitivity of nameof.
you can just cast it
int dbValue = 2;
EnumDisplayStatus enumValue = (EnumDisplayStatus)dbValue;
string stringName = enumValue.ToString(); //Visible
ah.. kent beat me to it :)
SOLUTION:
int enumValue = 2; // The value for which you want to get string
string enumName = Enum.GetName(typeof(EnumDisplayStatus), enumValue);
Also, using GetName is better than Explicit casting of Enum.
[Code for Performance Benchmark]
Stopwatch sw = new Stopwatch (); sw.Start (); sw.Stop (); sw.Reset ();
double sum = 0;
int n = 1000;
Console.WriteLine ("\nGetName method way:");
for (int i = 0; i < n; i++) {
sw.Start ();
string t = Enum.GetName (typeof (Roles), roleValue);
sw.Stop ();
sum += sw.Elapsed.TotalMilliseconds;
sw.Reset ();
}
Console.WriteLine ($"Average of {n} runs using Getname method casting way: {sum / n}");
Console.WriteLine ("\nExplicit casting way:");
for (int i = 0; i < n; i++) {
sw.Start ();
string t = ((Roles)roleValue).ToString ();
sw.Stop ();
sum += sw.Elapsed.TotalMilliseconds;
sw.Reset ();
}
Console.WriteLine ($"Average of {n} runs using Explicit casting way: {sum / n}");
[Sample result]
GetName method way:
Average of 1000 runs using Getname method casting way: 0.000186899999999998
Explicit casting way:
Average of 1000 runs using Explicit casting way: 0.000627900000000002
DB to C#
EnumDisplayStatus status = (EnumDisplayStatus)int.Parse(GetValueFromDb());
C# to DB
string dbStatus = ((int)status).ToString();
Just need:
string stringName = EnumDisplayStatus.Visible.ToString("f");
// stringName == "Visible"
"f"
specifier is nuanced, and may or may not be what the caller wants (it depends on: what they want): docs.microsoft.com/en-us/dotnet/standard/base-types/…
i have used this code given below
CustomerType = ((EnumCustomerType)(cus.CustomerType)).ToString()
For getting the String value [Name]:
EnumDisplayStatus enumDisplayStatus = (EnumDisplayStatus)GetDBValue();
string stringValue = $"{enumDisplayStatus:G}";
And for getting the enum value:
string stringValue = $"{enumDisplayStatus:D}";
SetDBValue(Convert.ToInt32(stringValue ));
Just cast the int to the enumeration type:
EnumDisplayStatus status = (EnumDisplayStatus) statusFromDatabase;
string statusString = status.ToString();
Given:
enum Colors {
Red = 1,
Green = 2,
Blue = 3
};
In .NET 4.7 the following
Console.WriteLine( Enum.GetName( typeof(Colors), Colors.Green ) );
Console.WriteLine( Enum.GetName( typeof(Colors), 3 ) );
will display
Green
Blue
In .NET 6 the above still works, but also:
Console.WriteLine( Enum.GetName( Colors.Green ) );
Console.WriteLine( Enum.GetName( (Colors)3 ) );
will display:
Green
Blue
You can try this
string stringValue=( (MyEnum)(MyEnum.CSV)).ToString();
Success story sharing
enum Foo { A = 1, B= 1 }
?