Enum.CompareTo(Object) メソッド

定義

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。Compares this instance to a specified object and returns an indication of their relative values.

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 nullAn object to compare, or null.

戻り値

このインスタンスと target の相対値を示す符号付き数値。A signed number that indicates the relative values of this instance and target.

[値]Value 意味Meaning
0 より小さい値Less than zero このインスタンスの値が target より小さい値です。The value of this instance is less than the value of target.
0Zero このインスタンスの値が target の値と同じです。The value of this instance is equal to the value of target.
0 より大きい値Greater than zero このインスタンスの値が target より大きい値です。The value of this instance is greater than the value of target. または-or- targetnull です。target is null.

実装

例外

target とこのインスタンスは同じ型ではありません。target and this instance are not the same type.

このインスタンスの型は SByteInt16Int32Int64ByteUInt16UInt32UInt64 のいずれでもありません。This instance is not type SByte, Int16, Int32, Int64, Byte, UInt16, UInt32, or UInt64.

このインスタンスは null です。This instance is null.

次の例は、CompareToのコンテキストでEnumを使用する方法を示しています。The following example illustrates the use of CompareTo in the context of Enum.

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
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

適用対象

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