Better Way To Get Char Enum

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Is there a cleaner way to get the char value of an enum in C#.

 public enum DivisionStatus
        {
            None = 'N',
            Active = 'A',
            Inactive = 'I',
            Waitlist = 'W'
        }

string status = Enums.DivisionStatus.Active.ToString()[0].ToString(); // "A"

Just cast the value:

char status = (char)Enums.DivisionStatus.Active;

Note that this will use the value instead of the identifier. The Enums.DivisionStatus.Active value is the character code of 'A', as that is the value that you have defined.

Using the value directly is faster than looking up the identifier for the value.

C# Enum with Char Valued Items, How to use a char as a value for enum items, and why. ToString();. This way, you can extract the char from the int , and get your value! var status = (char)Enums.DivisionStatus.Active; nên làm chính xác những gì bạn muốn. Cách bạn đang làm trước đây sẽ không hiệu quả nếu ký tự đầu tiên của văn bản enum không khớp với giá trị char cơ bản.

I build a "pseudo-enum" that solves the problem. In your case it could look like:

public class DivisionStatus
{
    public static readonly DivisionStatus None = new DivisionStatus('N');
    public static readonly DivisionStatus Active = new DivisionStatus('A');
    public static readonly DivisionStatus Inactive = new DivisionStatus('I');
    public static readonly DivisionStatus Waitlist = new DivisionStatus('W');

    internal char Value { get; private set; }

    public override string ToString()
    {
        return Value.ToString();
    }

    protected DivisionStatus(char value)
    {
        this.Value = value;
    }
}

You can use it like an enum that returns the char enum value on ToString() without casting:

Console.WriteLine(DivisionStatus.None); // returns 'N'

https://social.msdn.microsoft.com/Forums/vstudio/e, https://docs.microsoft.com › Docs › .NET › C# guide › Language reference var status = (char)Enums.DivisionStatus.Active; ควรทำสิ่งที่คุณต้องการ วิธีที่คุณทำก่อนหน้านี้จะไม่ได้ผลถ้าอักขระตัวแรกของข้อความ enum ไม่ตรงกับค่า

Simple casting works, I tried it:

using System;

public enum DivisionStatus
{
  None = 'N',
  Active = 'X',
  Inactive = 'I',
  Waitlist = 'W'
}

class Program
{
  public static void Main()
  {
    var ds = DivisionStatus.Active;
    Console.WriteLine((char)ds);
  }
}

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You could also use a static class. Although, if you're always going to using the values as strings, you could just as easily make each property a string instead. One advantage of this method is that you can add descriptions for each item that will show up in the InteliSense.

public static class DivisionStatus
{
    /// <summary>
    /// Some information about None
    /// </summary>
    public const char None = 'N';
    /// <summary>
    /// Some information about Active, blah blah
    /// </summary>
    public const char Active = 'A';
    /// <summary>
    /// Some information about Inactive, blah blah
    /// </summary>
    public const char Inactive = 'I';
    /// <summary>
    /// Some information about Waitlist, blah blah
    /// </summary>
    public const char Waitlist = 'W';
}

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var status = (char)Enums.DivisionStatus.Active; should do exactly what you want. The way you were doing it before wouldn't have worked if the first character of the enum text didn't match the underlying char value.

This also works for enums that have an int as a backing type.

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Comments
  • OmG... Good that you asked here.
  • You were asking of a cleaner way to get the char value, but you do not get the char value at all. You get the first character of the name of the constant. If you changed the char value of Active to 'B', the result woudl still be "A".
  • The underlying type can be any integral type except char: msdn.microsoft.com/en-us/library/sbbt4032(v=vs.80).aspx
  • I think I didn't explain it correctly. If I wanted it has a string as the ending result and not a char.
  • @MikeFlynn: I see, I assumed that you wanted a char value when you asked for a char value. ;) Then just add .ToString() at the end, that is the simplest way to create a string from the enumeration value.
  • This does not return 'N', DivisionStatus.None.ToString() returns 'N'
  • The enum does have an int as a backing type (as it's the default). The char values that are used in the definition are implicitly converted to int values.