Enum.GetUnderlyingType(Type) 메서드

정의

네임스페이스:

System

어셈블리:

System.Runtime.dll

어셈블리:

mscorlib.dll

어셈블리:

netstandard.dll

지정된 열거형의 내부 형식을 반환합니다.

public:
 static Type ^ GetUnderlyingType(Type ^ enumType);

public static Type GetUnderlyingType (Type enumType);

[System.Runtime.InteropServices.ComVisible(true)]
public static Type GetUnderlyingType (Type enumType);

static member GetUnderlyingType : Type -> Type

[<System.Runtime.InteropServices.ComVisible(true)>]
static member GetUnderlyingType : Type -> Type

Public Shared Function GetUnderlyingType (enumType As Type) As Type

매개 변수

enumType

Type

내부 형식이 검색되는 열거형입니다.

반환

Type

enumType의 내부 형식입니다.

특성

ComVisibleAttribute

예외

ArgumentNullException

enumType이(가) null인 경우

ArgumentException

enumType이 Enum이 아닌 경우

예제

다음 예제에서는 메서드를 GetUnderlyingType 호출하여 일부 열거형 멤버의 기본 형식을 표시합니다.

using System;

public class Example
{
   public static void Main()
   {
      Enum[] enumValues = { ConsoleColor.Red, DayOfWeek.Monday,
                            MidpointRounding.ToEven, PlatformID.Win32NT,
                            DateTimeKind.Utc, StringComparison.Ordinal };
      Console.WriteLine("{0,-10} {1, 18}   {2,15}\n",
                        "Member", "Enumeration", "Underlying Type");
      foreach (var enumValue in enumValues)
         DisplayEnumInfo(enumValue);
   }

   static void DisplayEnumInfo(Enum enumValue)
   {
      Type enumType = enumValue.GetType();
      Type underlyingType = Enum.GetUnderlyingType(enumType);
      Console.WriteLine("{0,-10} {1, 18}   {2,15}",
                        enumValue, enumType.Name, underlyingType.Name);
   }
}
// The example displays the following output:
//       Member            Enumeration   Underlying Type
//
//       Red              ConsoleColor             Int32
//       Monday              DayOfWeek             Int32
//       ToEven       MidpointRounding             Int32
//       Win32NT            PlatformID             Int32
//       Utc              DateTimeKind             Int32
//       Ordinal      StringComparison             Int32

open System

let displayEnumInfo (enumValue: Enum) =
    let enumType = enumValue.GetType()
    let underlyingType = Enum.GetUnderlyingType enumType
    printfn $"{enumValue,-10} {enumType.Name, 18}   {underlyingType.Name,15}"

let enumValues: Enum list =
    [ ConsoleColor.Red; DayOfWeek.Monday
      MidpointRounding.ToEven; PlatformID.Win32NT
      DateTimeKind.Utc; StringComparison.Ordinal ]

printfn "%-10s %18s   %15s\n" "Member" "Enumeration" "Underlying Type"
for enumValue in enumValues do
    displayEnumInfo enumValue

// The example displays the following output:
//       Member            Enumeration   Underlying Type
//
//       Red              ConsoleColor             Int32
//       Monday              DayOfWeek             Int32
//       ToEven       MidpointRounding             Int32
//       Win32NT            PlatformID             Int32
//       Utc              DateTimeKind             Int32
//       Ordinal      StringComparison             Int32

Module Example
   Public Sub Main()
      Dim enumValues() As [Enum] = { ConsoleColor.Red, DayOfWeek.Monday, 
                                     MidpointRounding.ToEven, PlatformID.Win32NT, 
                                     DateTimeKind.Utc, StringComparison.Ordinal }
      Console.WriteLine("{0,-10} {1, 18}   {2,15}", 
                        "Member", "Enumeration", "Underlying Type")
      Console.WriteLine()
      For Each enumValue In enumValues
         DisplayEnumInfo(enumValue)
      Next
   End Sub

   Sub DisplayEnumInfo(enumValue As [Enum])
      Dim enumType As Type = enumValue.GetType()
      Dim underlyingType As Type = [Enum].GetUnderlyingType(enumType)
      Console.WriteLine("{0,-10} {1, 18}   {2,15}",
                        enumValue, enumType.Name, underlyingType.Name)   
   End Sub
End Module
' The example displays the following output:
'       Member            Enumeration   Underlying Type
'       
'       Red              ConsoleColor             Int32
'       Monday              DayOfWeek             Int32
'       ToEven       MidpointRounding             Int32
'       Win32NT            PlatformID             Int32
'       Utc              DateTimeKind             Int32
'       Ordinal      StringComparison             Int32

설명

구조체 Enum 를 사용하면 값을 명명된 상수로 나타낼 수 있습니다. 열거형 값의 데이터 형식을 기본 형식이라고 합니다. 예를 들어 요일(DayOfWeek.TuesdayDayOfWeek.Monday등)을 나타내는 상수로 구성된 열거형의 기본 형식 DayOfWeek 은 Int32다음과 같습니다.

추가 정보

• GetTypeCode()