Enum String Name from Value

Question

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 .

Answer 1

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();

Answer 2

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);

Answer 3

尝试这个：

string m = Enum.GetName(typeof(MyEnumClass), value);

Answer 4

用这个：

string bob = nameof(EnumDisplayStatus.Visible);

Answer 5

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 .

Answer 6

you can just cast it

int dbValue = 2;
EnumDisplayStatus enumValue = (EnumDisplayStatus)dbValue;
string stringName = enumValue.ToString(); //Visible

ah.. kent beat me to it :)

Answer 7

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

Answer 8

DB to C#

EnumDisplayStatus status = (EnumDisplayStatus)int.Parse(GetValueFromDb());

C# to DB

string dbStatus = ((int)status).ToString();

Answer 9

Just need:

string stringName = EnumDisplayStatus.Visible.ToString("f");
// stringName == "Visible"

Answer 10

我使用了下面给出的代码

 CustomerType = ((EnumCustomerType)(cus.CustomerType)).ToString()

Answer 11

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 ));

Answer 12

Just cast the int to the enumeration type:

EnumDisplayStatus status = (EnumDisplayStatus) statusFromDatabase;
string statusString = status.ToString();

Answer 13

Simply you can do this.

public enum EnumDisplayStatus
{
    None    = 1,
    Visible = 2,
    Hidden  = 3,
    MarkedForDeletion = 4
}

int value = 2;    
string stringValue = ((EnumDisplayStatus)value).ToString();

Answer 14

你可以试试这个

string stringValue=( (MyEnum)(MyEnum.CSV)).ToString();