Enum.CompareTo(Object) メソッド

定義

名前空間:

System

アセンブリ:

System.Runtime.dll

ソース:

Enum.cs

指定したオブジェクトとこのインスタンスを比較し、これらの相対値を示す値を返します。

public:
 virtual int CompareTo(System::Object ^ target);

public int CompareTo (object? target);

abstract member CompareTo : obj -> int
override this.CompareTo : obj -> int

Public Function CompareTo (target As Object) As Integer

パラメーター

target

Object

比較対象のオブジェクト、または null。

戻り値

Int32

このインスタンスと target の相対値を示す符号付き数値。

値	説明
0 より小さい値	このインスタンスの値が target より小さい値です。
ゼロ	このインスタンスの値が target の値と同じです。
0 より大きい値	このインスタンスの値が target の値より大きいか、target が null です。

実装

CompareTo(Object)

例外

ArgumentException

target とこのインスタンスは同じ型ではありません。

InvalidOperationException

このインスタンスの型は SByte、Int16、Int32、Int64、Byte、UInt16、UInt32、UInt64 のいずれでもありません。

NullReferenceException

このインスタンスは null です。

例

次の例は、EnumコンテキストでCompareToを使用する方法を示しています。

using namespace System;

public enum class VehicleDoors
{
   Motorbike = 0,
   Sportscar = 2,
   Sedan = 4,
   Hatchback = 5
};

int main()
{
   VehicleDoors myVeh = VehicleDoors::Sportscar;
   VehicleDoors yourVeh = VehicleDoors::Motorbike;
   VehicleDoors otherVeh = VehicleDoors::Sedan;
   Console::WriteLine(  "Does a {0} have more doors than a {1}?", myVeh, yourVeh );
   Int32 iRes = myVeh.CompareTo( yourVeh );
   Console::WriteLine(  "{0}{1}", iRes > 0 ? (String^)"Yes" : "No", Environment::NewLine );
   Console::WriteLine(  "Does a {0} have more doors than a {1}?", myVeh, otherVeh );
   iRes = myVeh.CompareTo( otherVeh );
   Console::WriteLine(  "{0}", iRes > 0 ? (String^)"Yes" : "No" );
}
// The example displays the following output:
//       Does a Sportscar have more doors than a Motorbike?
//       Yes
//       
//       Does a Sportscar have more doors than a Sedan?
//       No

using System;

public class CompareToTest {
    enum VehicleDoors { Motorbike = 0, Sportscar = 2, Sedan = 4, Hatchback = 5 };

    public static void Main() {
        VehicleDoors myVeh = VehicleDoors.Sportscar;
        VehicleDoors yourVeh = VehicleDoors.Motorbike;
        VehicleDoors otherVeh = VehicleDoors.Sedan;

        Console.WriteLine("Does a {0} have more doors than a {1}?", myVeh, yourVeh);
        Console.WriteLine( "{0}{1}", myVeh.CompareTo(yourVeh) > 0 ? "Yes" : "No", Environment.NewLine );

        Console.WriteLine("Does a {0} have more doors than a {1}?", myVeh, otherVeh);
        Console.WriteLine( "{0}", myVeh.CompareTo(otherVeh) > 0 ? "Yes" : "No" );
    }
}
// The example displays the following output:
//       Does a Sportscar have more doors than a Motorbike?
//       Yes
//
//       Does a Sportscar have more doors than a Sedan?
//       No

type VehicleDoors =
    | Motorbike = 0
    | Sportscar = 2
    | Sedan = 4
    | Hatchback = 5

let myVeh = VehicleDoors.Sportscar
let yourVeh = VehicleDoors.Motorbike
let otherVeh = VehicleDoors.Sedan

printfn $"Does a {myVeh} have more doors than a {yourVeh}?"
printfn $"""{if myVeh.CompareTo yourVeh > 0 then "Yes" else "No"}\n"""

printfn $"Does a {myVeh} have more doors than a {otherVeh}?"
printfn $"""{if myVeh.CompareTo otherVeh > 0 then "Yes" else "No"}"""

// The example displays the following output:
//       Does a Sportscar have more doors than a Motorbike?
//       Yes
//
//       Does a Sportscar have more doors than a Sedan?
//       No

Public Class CompareToTest
    Enum VehicleDoors
        Motorbike = 0
        Sportscar = 2
        Sedan = 4
        Hatchback = 5
    End Enum
    
    Public Shared Sub Main()
        Dim myVeh As VehicleDoors = VehicleDoors.Sportscar
        Dim yourVeh As VehicleDoors = VehicleDoors.Motorbike
        Dim otherVeh As VehicleDoors = VehicleDoors.Sedan
        
        Dim output as String

        If myVeh.CompareTo(yourVeh) > 0 Then output = "Yes" Else output = "No"
        Console.WriteLine("Does a {0} have more doors than a {1}?", myVeh, yourVeh)
        Console.WriteLine("{0}{1}", output, Environment.NewLine)
        
        Console.WriteLine("Does a {0} have more doors than a {1}?", myVeh, otherVeh)
        If myVeh.CompareTo(otherVeh) > 0 Then output = "Yes" Else output = "No"
        Console.WriteLine("{0}", output)
    End Sub
End Class
' The example displays the following output:
'       Does a Sportscar have more doors than a Motorbike?
'       Yes
'       
'       Does a Sportscar have more doors than a Sedan?
'       No

こちらもご覧ください

• Equals(Object)