Enum.CompareTo(Object) Metode

Definisi

Ruang nama:

System

Rakitan:

System.Runtime.dll

Sumber:

Enum.cs

Membandingkan instans ini dengan objek tertentu dan mengembalikan indikasi nilai relatifnya.

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

Parameter

target

Object

Objek untuk dibandingkan, atau null.

Mengembalikan

Int32

Nomor yang ditandatangani yang menunjukkan nilai relatif instans ini dan target.

Nilai	Makna
Kurang dari nol	Nilai instans ini kurang dari nilai target.
Nol	Nilai instans ini sama dengan nilai target.
Lebih besar dari nol	Nilai instans ini lebih besar dari nilai target, atau target adalah null.

Penerapan

CompareTo(Object)

Pengecualian

ArgumentException

target dan instans ini bukan jenis yang sama.

InvalidOperationException

Instans ini bukan jenis SByte, , Int32Int16, Int64, Byte, UInt16, UInt32, atau UInt64.

NullReferenceException

Instans ini null.

Contoh

Contoh berikut mengilustrasikan penggunaan CompareTo dalam konteks 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

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

Lihat juga

• Equals(Object)