Byte.CompareTo Metoda

Definice

Obor názvů:: System

Sestavení:: mscorlib.dll, System.Runtime.dll

Sestavení:: netstandard.dll, System.Runtime.dll

Sestavení:: System.Runtime.dll

Sestavení:: mscorlib.dll

Sestavení:: netstandard.dll

Důležité

Některé informace platí pro předběžně vydaný produkt, který se může zásadně změnit, než ho výrobce nebo autor vydá. Microsoft neposkytuje žádné záruky, výslovné ani předpokládané, týkající se zde uváděných informací.

Porovná tuto instanci se zadaným objektem nebo Byte vrátí indikaci jejich relativních hodnot.

Přetížení

Name	Description
CompareTo(Byte)	Porovná tuto instanci se zadaným 8bitovým celočíselnou hodnotou bez znaménka a vrátí indikaci jejich relativních hodnot.
CompareTo(Object)	Porovná tuto instanci se zadaným objektem a vrátí indikaci jejich relativních hodnot.

CompareTo(Byte)

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Porovná tuto instanci se zadaným 8bitovým celočíselnou hodnotou bez znaménka a vrátí indikaci jejich relativních hodnot.

public:
 virtual int CompareTo(System::Byte value);

public int CompareTo(byte value);

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

Public Function CompareTo (value As Byte) As Integer

Parametry

value: Byte

8bitové celé číslo bez znaménka, které se má porovnat.

Návraty

Int32

Celé číslo se znaménkem, které označuje relativní pořadí této instance a value.

Návratová hodnota	Popis
Menší než nula	Tato instance je menší než `value`.
Nula	Tato instance je rovna `value`.
Větší než nula	Tato instance je větší než `value`.

Implementuje

CompareTo(T)

Příklady

Následující příklad kódu ukazuje obecné a ne generické verze CompareTo metody pro několik hodnot a odkazové typy.

// This example demonstrates the generic and non-generic versions of the
// CompareTo method for several base types.
// The non-generic version takes a parameter of type Object, while the generic
// version takes a type-specific parameter, such as Boolean, Int32, or Double.

using System;

class Sample
{
    public static void Main()
    {
    string    nl = Environment.NewLine;
    string    msg = "{0}The following is the result of using the generic and non-generic{0}" +
                    "versions of the CompareTo method for several base types:{0}";

    DateTime  now = DateTime.Now;
// Time span = 11 days, 22 hours, 33 minutes, 44 seconds
    TimeSpan  tsX = new TimeSpan(11, 22, 33, 44);
// Version = 1.2.333.4
    Version   versX = new Version("1.2.333.4");
// Guid = CA761232-ED42-11CE-BACD-00AA0057B223
    Guid      guidX = new Guid("{CA761232-ED42-11CE-BACD-00AA0057B223}");

    Boolean  a1 = true,  a2 = true;
    Byte     b1 = 1,     b2 = 1;
    Int16    c1 = -2,    c2 = 2;
    Int32    d1 = 3,     d2 = 3;
    Int64    e1 = 4,     e2 = -4;
    Decimal  f1 = -5.5m, f2 = 5.5m;
    Single   g1 = 6.6f,  g2 = 6.6f;
    Double   h1 = 7.7d,  h2 = -7.7d;
    Char     i1 = 'A',   i2 = 'A';
    String   j1 = "abc", j2 = "abc";
    DateTime k1 = now,   k2 = now;
    TimeSpan l1 = tsX,   l2 = tsX;
    Version  m1 = versX, m2 = new Version("2.0");
    Guid     n1 = guidX, n2 = guidX;

// The following types are not CLS-compliant.
    SByte    w1 = 8,     w2 = 8;
    UInt16   x1 = 9,     x2 = 9;
    UInt32   y1 = 10,    y2 = 10;
    UInt64   z1 = 11,    z2 = 11;
//
    Console.WriteLine(msg, nl);
    try
        {
// The second and third Show method call parameters are automatically boxed because
// the second and third Show method declaration arguments expect type Object.

        Show("Boolean:  ", a1, a2, a1.CompareTo(a2), a1.CompareTo((Object)a2));
        Show("Byte:     ", b1, b2, b1.CompareTo(b2), b1.CompareTo((Object)b2));
        Show("Int16:    ", c1, c2, c1.CompareTo(c2), c1.CompareTo((Object)c2));
        Show("Int32:    ", d1, d2, d1.CompareTo(d2), d1.CompareTo((Object)d2));
        Show("Int64:    ", e1, e2, e1.CompareTo(e2), e1.CompareTo((Object)e2));
        Show("Decimal:  ", f1, f2, f1.CompareTo(f2), f1.CompareTo((Object)f2));
        Show("Single:   ", g1, g2, g1.CompareTo(g2), g1.CompareTo((Object)g2));
        Show("Double:   ", h1, h2, h1.CompareTo(h2), h1.CompareTo((Object)h2));
        Show("Char:     ", i1, i2, i1.CompareTo(i2), i1.CompareTo((Object)i2));
        Show("String:   ", j1, j2, j1.CompareTo(j2), j1.CompareTo((Object)j2));
        Show("DateTime: ", k1, k2, k1.CompareTo(k2), k1.CompareTo((Object)k2));
        Show("TimeSpan: ", l1, l2, l1.CompareTo(l2), l1.CompareTo((Object)l2));
        Show("Version:  ", m1, m2, m1.CompareTo(m2), m1.CompareTo((Object)m2));
        Show("Guid:     ", n1, n2, n1.CompareTo(n2), n1.CompareTo((Object)n2));
//
        Console.WriteLine("{0}The following types are not CLS-compliant:", nl);
        Show("SByte:    ", w1, w2, w1.CompareTo(w2), w1.CompareTo((Object)w2));
        Show("UInt16:   ", x1, x2, x1.CompareTo(x2), x1.CompareTo((Object)x2));
        Show("UInt32:   ", y1, y2, y1.CompareTo(y2), y1.CompareTo((Object)y2));
        Show("UInt64:   ", z1, z2, z1.CompareTo(z2), z1.CompareTo((Object)z2));
        }
    catch (Exception e)
        {
        Console.WriteLine(e);
        }
    }

    public static void Show(string caption, Object var1, Object var2,
                            int resultGeneric, int resultNonGeneric)
    {
    string relation;

    Console.Write(caption);
    if (resultGeneric == resultNonGeneric)
        {
        if      (resultGeneric < 0) relation = "less than";
        else if (resultGeneric > 0) relation = "greater than";
        else                        relation = "equal to";
        Console.WriteLine("{0} is {1} {2}", var1, relation, var2);
        }

// The following condition will never occur because the generic and non-generic
// CompareTo methods are equivalent.

    else
        {
        Console.WriteLine("Generic CompareTo = {0}; non-generic CompareTo = {1}",
                           resultGeneric, resultNonGeneric);
        }
   }
}
/*
This example produces the following results:

The following is the result of using the generic and non-generic versions of the
CompareTo method for several base types:

Boolean:  True is equal to True
Byte:     1 is equal to 1
Int16:    -2 is less than 2
Int32:    3 is equal to 3
Int64:    4 is greater than -4
Decimal:  -5.5 is less than 5.5
Single:   6.6 is equal to 6.6
Double:   7.7 is greater than -7.7
Char:     A is equal to A
String:   abc is equal to abc
DateTime: 12/1/2003 5:37:46 PM is equal to 12/1/2003 5:37:46 PM
TimeSpan: 11.22:33:44 is equal to 11.22:33:44
Version:  1.2.333.4 is less than 2.0
Guid:     ca761232-ed42-11ce-bacd-00aa0057b223 is equal to ca761232-ed42-11ce-bacd-00
aa0057b223

The following types are not CLS-compliant:
SByte:    8 is equal to 8
UInt16:   9 is equal to 9
UInt32:   10 is equal to 10
UInt64:   11 is equal to 11
*/

' This example demonstrates the generic and non-generic versions of the 
' CompareTo method for several base types.
' The non-generic version takes a parameter of type Object, while the generic
' version takes a type-specific parameter, such as Boolean, Int32, or Double.

Class Sample
   Public Shared Sub Main()
      Dim nl As String = Environment.NewLine
      Dim msg As String = _
          "{0}The following is the result of using the generic and non-generic{0}" & _
          "versions of the CompareTo method for several base types:{0}"
      
      Dim now As DateTime = DateTime.Now
      ' Time span = 11 days, 22 hours, 33 minutes, 44 seconds
      Dim tsX As New TimeSpan(11, 22, 33, 44)
      ' Version = 1.2.333.4
      Dim versX As New Version("1.2.333.4")
      ' Guid = CA761232-ED42-11CE-BACD-00AA0057B223
      Dim guidX As New Guid("{CA761232-ED42-11CE-BACD-00AA0057B223}")
      
      Dim a1 As [Boolean] = True,    a2 As [Boolean] = True
      Dim b1 As [Byte] = 1,          b2 As [Byte] = 1
      Dim c1 As Int16 = -2,          c2 As Int16 = 2
      Dim d1 As Int32 = 3,           d2 As Int32 = 3
      Dim e1 As Int64 = 4,           e2 As Int64 = -4
      Dim f1 As [Decimal] = -5.5D,   f2 As [Decimal] = 5.5D
      Dim g1 As [Single] = 6.6F,     g2 As [Single] = 6.6F
      Dim h1 As [Double] = 7.7,      h2 As [Double] = -7.7
      Dim i1 As [Char] = "A"c,       i2 As [Char] = "A"c
      Dim j1 As String = "abc",      j2 As String = "abc"
      Dim k1 As DateTime = now,      k2 As DateTime = now
      Dim l1 As TimeSpan = tsX,      l2 As TimeSpan = tsX
      Dim m1 As Version = versX,     m2 As New Version("2.0")
      Dim n1 As Guid = guidX,        n2 As Guid = guidX
      
      ' The following types are not CLS-compliant.
      ' SByte, UInt16, UInt32, UInt64

      Console.WriteLine(msg, nl)
      Try
         ' The second and third Show method call parameters are automatically boxed because
         ' the second and third Show method declaration arguments expect type Object.

         Show("Boolean:  ", a1, a2, a1.CompareTo(a2), a1.CompareTo(CObj(a2)))
         Show("Byte:     ", b1, b2, b1.CompareTo(b2), b1.CompareTo(CObj(b2)))
         Show("Int16:    ", c1, c2, c1.CompareTo(c2), c1.CompareTo(CObj(c2)))
         Show("Int32:    ", d1, d2, d1.CompareTo(d2), d1.CompareTo(CObj(d2)))
         Show("Int64:    ", e1, e2, e1.CompareTo(e2), e1.CompareTo(CObj(e2)))
         Show("Decimal:  ", f1, f2, f1.CompareTo(f2), f1.CompareTo(CObj(f2)))
         Show("Single:   ", g1, g2, g1.CompareTo(g2), g1.CompareTo(CObj(g2)))
         Show("Double:   ", h1, h2, h1.CompareTo(h2), h1.CompareTo(CObj(h2)))
         Show("Char:     ", i1, i2, i1.CompareTo(i2), i1.CompareTo(CObj(i2)))
         Show("String:   ", j1, j2, j1.CompareTo(j2), j1.CompareTo(CObj(j2)))
         Show("DateTime: ", k1, k2, k1.CompareTo(k2), k1.CompareTo(CObj(k2)))
         Show("TimeSpan: ", l1, l2, l1.CompareTo(l2), l1.CompareTo(CObj(l2)))
         Show("Version:  ", m1, m2, m1.CompareTo(m2), m1.CompareTo(CObj(m2)))
         Show("Guid:     ", n1, n2, n1.CompareTo(n2), n1.CompareTo(CObj(n2)))
         '
         Console.WriteLine("{0}The following types are not CLS-compliant:", nl)
         Console.WriteLine("SByte, UInt16, UInt32, UInt64")

      Catch e As Exception
         Console.WriteLine(e)
      End Try
   End Sub
   
   Public Shared Sub Show(caption As String, var1 As [Object], var2 As [Object], _
                          resultGeneric As Integer, resultNonGeneric As Integer)
      Dim relation As String
      
      Console.Write(caption)
      If resultGeneric = resultNonGeneric Then
         If resultGeneric < 0 Then
            relation = "less than"
         ElseIf resultGeneric > 0 Then
            relation = "greater than"
         Else
            relation = "equal to"
         End If
         Console.WriteLine("{0} is {1} {2}", var1, relation, var2)
      
      ' The following condition will never occur because the generic and non-generic
      ' CompareTo methods are equivalent.

      Else
         Console.WriteLine("Generic CompareTo = {0}; non-generic CompareTo = {1}", _
                            resultGeneric, resultNonGeneric)
      End If
   End Sub
End Class
'
'This example produces the following results:
'
'The following is the result of using the generic and non-generic versions of the
'CompareTo method for several base types:
'
'Boolean:  True is equal to True
'Byte:     1 is equal to 1
'Int16:    -2 is less than 2
'Int32:    3 is equal to 3
'Int64:    4 is greater than -4
'Decimal:  -5.5 is less than 5.5
'Single:   6.6 is equal to 6.6
'Double:   7.7 is greater than -7.7
'Char:     A is equal to A
'String:   abc is equal to abc
'DateTime: 12/1/2003 5:37:46 PM is equal to 12/1/2003 5:37:46 PM
'TimeSpan: 11.22:33:44 is equal to 11.22:33:44
'Version:  1.2.333.4 is less than 2.0
'Guid:     ca761232-ed42-11ce-bacd-00aa0057b223 is equal to ca761232-ed42-11ce-bacd-00
'aa0057b223
'
'The following types are not CLS-compliant:
'SByte, UInt16, UInt32, UInt64
'

Poznámky

Tato metoda implementuje System.IComparable<T> rozhraní a provádí mírně lépe než Byte.CompareTo(Object) metoda, protože nemusí převést value parametr na objekt.

V závislosti na programovacím jazyce může být možné zakódovat metodu CompareTo , ve které má typ parametru méně bitů (je užší) než typ instance. Je to možné, protože některé programovací jazyky provádějí implicitní rozšiřující převod, který představuje parametr jako typ s tolika bity, kolik bitů má instance.

Předpokládejme například, že typ instance je Int32 a typ parametru je Byte. Kompilátor jazyka C# Microsoft generuje instrukce představující hodnotu parametru jako Int32 a pak vygeneruje metodu Int32.CompareTo, která porovnává hodnoty instance Int32 a reprezentaci parametru Int32.

Pokud chcete zjistit, jestli kompilátor provádí implicitní rozšiřující převody u číselných typů, projděte si dokumentaci k programovacímu jazyku.

Viz také

Platí pro

CompareTo(Object)

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Zdroj:: Byte.cs

Porovná tuto instanci se zadaným objektem a vrátí indikaci jejich relativních hodnot.

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

public int CompareTo(object? value);

public int CompareTo(object value);

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

Public Function CompareTo (value As Object) As Integer

Parametry

value: Object

Objekt, který chcete porovnat, nebo null.

Návraty

Int32

Celé číslo se znaménkem, které označuje relativní pořadí této instance a value.

Návratová hodnota	Popis
Menší než nula	Tato instance je menší než `value`.
Nula	Tato instance je rovna `value`.
Větší než nula	Tato instance je větší než `value`nebo `value` je `null`.

Implementuje

CompareTo(Object)

Výjimky

ArgumentException

valuenení .Byte

Příklady

Následující příklad kódu ukazuje metodu CompareTo .

public void Compare(Byte myByte)
{
   int myCompareResult;

   myCompareResult = MemberByte.CompareTo(myByte);

   if(myCompareResult > 0)
   {
      Console.WriteLine("{0} is less than the MemberByte value {1}", myByte.ToString(), MemberByte.ToString());
   }
   else if(myCompareResult < 0)
   {
      Console.WriteLine("{0} is greater than the MemberByte value {1}", myByte.ToString(), MemberByte.ToString());
   }
   else
   {
      Console.WriteLine("{0} is equal to the MemberByte value {1}", myByte.ToString(), MemberByte.ToString());
   }
}

let compare (byte1: byte) byte2 =
    let myCompareResult = byte1.CompareTo byte2

    if myCompareResult > 0 then
        printfn $"{byte1} is less than the MemberByte value {byte2}"

    elif myCompareResult < 0 then
        printfn $"{byte1} is greater than the MemberByte value {byte2}"
    
    else
        printfn $"{byte1} is equal to the MemberByte value {byte2}"

Public Sub Compare(ByVal myByte As [Byte])
   Dim myCompareResult As Integer

   myCompareResult = MemberByte.CompareTo(myByte)

   If myCompareResult > 0 Then
      Console.WriteLine("{0} is less than the MemberByte value {1}", myByte.ToString(), MemberByte.ToString())
   Else
      If myCompareResult < 0 Then
         Console.WriteLine("{0} is greater than the MemberByte value {1}", myByte.ToString(), MemberByte.ToString())
      Else
         Console.WriteLine("{0} is equal to the MemberByte value {1}", myByte.ToString(), MemberByte.ToString())
      End If
   End If
End Sub

Poznámky

value musí být null nebo instance Byte; v opačném případě je vyvolán výjimka.

Jakákoli instance Byte, bez ohledu na jeho hodnotu, je považována za větší než null.

Tato metoda je implementována pro podporu IComparable rozhraní.

Viz také

Platí pro

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