Decimal.CompareTo Méthode
Définition
Important
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Compare cette instance à un objet spécifié ou Decimal et retourne une indication de leurs valeurs relatives.
Surcharges
| CompareTo(Decimal) |
Compare cette instance à un objet Decimal spécifié et retourne une comparaison de leurs valeurs relatives. |
| CompareTo(Object) |
Compare cette instance à un objet spécifié et retourne une comparaison de leurs valeurs relatives. |
CompareTo(Decimal)
- Source:
- Decimal.cs
- Source:
- Decimal.cs
- Source:
- Decimal.cs
Compare cette instance à un objet Decimal spécifié et retourne une comparaison de leurs valeurs relatives.
public:
virtual int CompareTo(System::Decimal value);public int CompareTo (decimal value);abstract member CompareTo : decimal -> int
override this.CompareTo : decimal -> intPublic Function CompareTo (value As Decimal) As IntegerParamètres
- value
- Decimal
Objet à comparer avec cette instance.
Retours
Nombre signé indiquant les valeurs relatives de cette instance et value.
| Valeur retournée | Signification |
|---|---|
| Inférieure à zéro | Cette instance est inférieure à value.
|
| Zéro | Cette instance est égale à value.
|
| Supérieure à zéro | Cette instance est supérieure à value.
|
Implémente
Exemples
L’exemple de code suivant illustre les versions génériques et non génériques de la CompareTo méthode pour plusieurs types valeur et référence.
// This example demonstrates the two versions of the
// CompareTo method for several base types.
// The general version takes a parameter of type Object, while the specific
// version takes a type-specific parameter, such as Boolean, Int32, or Double.
using namespace System;
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 );
}
}
int 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}";
Object^ obj; // An Object used to insure CompareTo(Object) is called.
DateTime now = DateTime::Now;
// Time span = 11 days, 22 hours, 33 minutes, 44 seconds
TimeSpan tsX = TimeSpan(11,22,33,44);
// Version = 1.2.333.4
Version^ versX = gcnew Version( "1.2.333.4" );
// Guid = CA761232-ED42-11CE-BACD-00AA0057B223
Guid guidX = 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 = Decimal(-5.5), f2 = Decimal(5.5);
Single g1 = 6.6f,g2 = 6.6f;
Double h1 = 7.7,h2 = -7.7;
Char i1 = 'A',i2 = 'A';
String^ j1 = "abc", ^j2 = "abc";
DateTime k1 = now,k2 = now;
TimeSpan l1 = tsX,l2 = tsX;
Version^ m1 = versX, ^m2 = gcnew 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
{
Show( "Boolean: ", a1, a2, a1.CompareTo( a2 ), a1.CompareTo( a2 ) );
Show( "Byte: ", b1, b2, b1.CompareTo( b2 ), b1.CompareTo( b2 ) );
Show( "Int16: ", c1, c2, c1.CompareTo( c2 ), c1.CompareTo( c2 ) );
Show( "Int32: ", d1, d2, d1.CompareTo( d2 ), d1.CompareTo( d2 ) );
Show( "Int64: ", e1, e2, e1.CompareTo( e2 ), e1.CompareTo( e2 ) );
Show( "Decimal: ", f1, f2, f1.CompareTo( f2 ), f1.CompareTo( f2 ) );
Show( "Single: ", g1, g2, g1.CompareTo( g2 ), g1.CompareTo( g2 ) );
Show( "Double: ", h1, h2, h1.CompareTo( h2 ), h1.CompareTo( h2 ) );
Show( "Char: ", i1, i2, i1.CompareTo( i2 ), i1.CompareTo( i2 ) );
// Use an anonymous object to hide the String object.
obj = j2;
Show( "String: ", j1, j2, j1->CompareTo( j2 ), j1->CompareTo( obj ) );
Show( "DateTime:", k1, k2, k1.CompareTo( k2 ), k1.CompareTo( k2 ) );
Show( "TimeSpan: ", l1, l2, l1.CompareTo( l2 ), l1.CompareTo( l2 ) );
// Use an anonymous object to hide the Version object.
obj = m2;
Show( "Version: ", m1, m2, m1->CompareTo( m2 ), m1->CompareTo( obj ) );
Show( "Guid: ", n1, n2, n1.CompareTo( n2 ), n1.CompareTo( n2 ) );
//
Console::WriteLine( "{0}The following types are not CLS-compliant:", nl );
Show( "SByte: ", w1, w2, w1.CompareTo( w2 ), w1.CompareTo( w2 ) );
Show( "UInt16: ", x1, x2, x1.CompareTo( x2 ), x1.CompareTo( x2 ) );
Show( "UInt32: ", y1, y2, y1.CompareTo( y2 ), y1.CompareTo( y2 ) );
Show( "UInt64: ", z1, z2, z1.CompareTo( z2 ), z1.CompareTo( z2 ) );
}
catch ( Exception^ e )
{
Console::WriteLine( e );
}
}
// This example displays the following output:
//
// 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.
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
'
Remarques
Cette méthode implémente l’interface System.IComparable<T> et fonctionne légèrement mieux que la Decimal.CompareTo méthode, car elle n’a pas besoin de convertir le value paramètre en objet .
Selon votre langage de programmation, il peut être possible de coder une CompareTo méthode où le type de paramètre a moins de bits (est plus étroit) que le type d’instance. Cela est possible, car certains langages de programmation effectuent une conversion étendue implicite qui représente le paramètre en tant que type avec autant de bits que l’instance.
Par exemple, supposons que le type d’instance est Int32 et que le type de paramètre est Byte. Le compilateur C# Microsoft génère des instructions pour représenter le paramètre en tant qu’objetInt32, puis génère une Int32.CompareTo méthode pour comparer les valeurs de l’instance Int32 et la représentation de Int32 paramètre.
Consultez la documentation de votre langage de programmation pour déterminer si son compilateur effectue des conversions étendues implicites sur des types numériques.
Voir aussi
S’applique à
CompareTo(Object)
- Source:
- Decimal.cs
- Source:
- Decimal.cs
- Source:
- Decimal.cs
Compare cette instance à un objet spécifié et retourne une comparaison de leurs valeurs relatives.
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 -> intPublic Function CompareTo (value As Object) As IntegerParamètres
- value
- Object
Objet à comparer à cette instance, ou null.
Retours
Nombre signé indiquant les valeurs relatives de cette instance et value.
| Valeur retournée | Signification |
|---|---|
| Inférieure à zéro | Cette instance est inférieure à value.
|
| Zéro | Cette instance est égale à value.
|
| Supérieure à zéro | Cette instance est supérieure à value, ou value est null.
|
Implémente
Exceptions
value n’est pas un Decimal.
Exemples
L’exemple de code suivant compare plusieurs Decimal objets et d’autres objets à une valeur de référence Decimal à l’aide de la CompareTo méthode .
// Example of the Decimal::CompareTo and Decimal::Equals instance
// methods.
using namespace System;
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Compare the Decimal to the Object parameters,
// and display the Object parameters with the results.
void CompDecimalToObject( Decimal Left, Object^ Right, String^ RightText )
{
Console::WriteLine( "{0,-46}{1}", String::Concat( "Object: ", RightText ), Right );
Console::WriteLine( "{0,-46}{1}", "Left.Equals( Object )", Left.Equals( Right ) );
Console::Write( "{0,-46}", "Left.CompareTo( Object )" );
try
{
// Catch the exception if CompareTo( ) throws one.
Console::WriteLine( "{0}\n", Left.CompareTo( Right ) );
}
catch ( Exception^ ex )
{
Console::WriteLine( "{0}\n", GetExceptionType( ex ) );
}
}
int main()
{
Console::WriteLine( "This example of the Decimal::Equals( Object* ) and \n"
"Decimal::CompareTo( Object* ) methods generates the \n"
"following output. It creates several different "
"Decimal \nvalues and compares them with the following "
"reference value.\n" );
// Create a reference Decimal value.
Decimal Left = Decimal(987.654);
Console::WriteLine( "{0,-46}{1}\n", "Left: Decimal( 987.654 )", Left );
// Create objects to compare with the reference.
CompDecimalToObject( Left, Decimal(9.8765400E+2), "Decimal( 9.8765400E+2 )" );
CompDecimalToObject( Left, Decimal::Parse( "987.6541" ), "Decimal::Parse( \"987.6541\" )" );
CompDecimalToObject( Left, Decimal::Parse( "987.6539" ), "Decimal::Parse( \"987.6539\" )" );
CompDecimalToObject( Left, Decimal(987654000,0,0,false,6), "Decimal( 987654000, 0, 0, false, 6 )" );
CompDecimalToObject( Left, 9.8765400E+2, "Double 9.8765400E+2" );
CompDecimalToObject( Left, "987.654", "String \"987.654\"" );
}
/*
This example of the Decimal::Equals( Object* ) and
Decimal::CompareTo( Object* ) methods generates the
following output. It creates several different Decimal
values and compares them with the following reference value.
Left: Decimal( 987.654 ) 987.654
Object: Decimal( 9.8765400E+2 ) 987.654
Left.Equals( Object ) True
Left.CompareTo( Object ) 0
Object: Decimal::Parse( "987.6541" ) 987.6541
Left.Equals( Object ) False
Left.CompareTo( Object ) -1
Object: Decimal::Parse( "987.6539" ) 987.6539
Left.Equals( Object ) False
Left.CompareTo( Object ) 1
Object: Decimal( 987654000, 0, 0, false, 6 ) 987.654000
Left.Equals( Object ) True
Left.CompareTo( Object ) 0
Object: Double 9.8765400E+2 987.654
Left.Equals( Object ) False
Left.CompareTo( Object ) ArgumentException
Object: String "987.654" 987.654
Left.Equals( Object ) False
Left.CompareTo( Object ) ArgumentException
*/
// Example of the decimal.CompareTo and decimal.Equals instance
// methods.
using System;
class DecCompToEqualsObjDemo
{
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Compare the decimal to the object parameters,
// and display the object parameters with the results.
public static void CompDecimalToObject( decimal Left,
object Right, string RightText )
{
Console.WriteLine( "{0,-46}{1}", "object: "+RightText,
Right );
Console.WriteLine( "{0,-46}{1}", "Left.Equals( object )",
Left.Equals( Right ) );
Console.Write( "{0,-46}", "Left.CompareTo( object )" );
try
{
// Catch the exception if CompareTo( ) throws one.
Console.WriteLine( "{0}\n", Left.CompareTo( Right ) );
}
catch( Exception ex )
{
Console.WriteLine( "{0}\n", GetExceptionType( ex ) );
}
}
public static void Main( )
{
Console.WriteLine(
"This example of the decimal.Equals( object ) and \n" +
"decimal.CompareTo( object ) methods generates the \n" +
"following output. It creates several different " +
"decimal \nvalues and compares them with the following " +
"reference value.\n" );
// Create a reference decimal value.
decimal Left = new decimal( 987.654 );
Console.WriteLine( "{0,-46}{1}\n",
"Left: decimal( 987.654 )", Left );
// Create objects to compare with the reference.
CompDecimalToObject( Left, new decimal( 9.8765400E+2 ),
"decimal( 9.8765400E+2 )" );
CompDecimalToObject( Left, 987.6541M, "987.6541D" );
CompDecimalToObject( Left, 987.6539M, "987.6539D" );
CompDecimalToObject( Left,
new decimal( 987654000, 0, 0, false, 6 ),
"decimal( 987654000, 0, 0, false, 6 )" );
CompDecimalToObject( Left, 9.8765400E+2,
"Double 9.8765400E+2" );
CompDecimalToObject( Left, "987.654", "String \"987.654\"" );
}
}
/*
This example of the decimal.Equals( object ) and
decimal.CompareTo( object ) methods generates the
following output. It creates several different decimal
values and compares them with the following reference value.
Left: decimal( 987.654 ) 987.654
object: decimal( 9.8765400E+2 ) 987.654
Left.Equals( object ) True
Left.CompareTo( object ) 0
object: 987.6541D 987.6541
Left.Equals( object ) False
Left.CompareTo( object ) -1
object: 987.6539D 987.6539
Left.Equals( object ) False
Left.CompareTo( object ) 1
object: decimal( 987654000, 0, 0, false, 6 ) 987.654000
Left.Equals( object ) True
Left.CompareTo( object ) 0
object: Double 9.8765400E+2 987.654
Left.Equals( object ) False
Left.CompareTo( object ) ArgumentException
object: String "987.654" 987.654
Left.Equals( object ) False
Left.CompareTo( object ) ArgumentException
*/
// Example of the decimal.CompareTo and decimal.Equals instance
// methods.
open System
// Get the exception type name remove the namespace prefix.
let getExceptionType (ex: exn) =
let exceptionType = ex.GetType() |> string
exceptionType.Substring(exceptionType.LastIndexOf '.' + 1)
// Compare the decimal to the object parameters,
// and display the object parameters with the results.
let compDecimalToObject (left: decimal) (right: obj) (rightText: string) =
printfn $"object: %-38s{rightText}{right}"
printfn $"""%-46s{"left.Equals(object)"}{left.Equals right}"""
printf $"""%-46s{"left.CompareTo(object)"}"""
try
// Catch the exception if CompareTo( ) throws one.
printfn $"{left.CompareTo right}\n"
with ex ->
printfn $"{getExceptionType ex}\n"
Console.WriteLine(
"This example of the decimal.Equals( object ) and \n" +
"decimal.CompareTo( object ) methods generates the \n" +
"following output. It creates several different " +
"decimal \nvalues and compares them with the following " +
"reference value.\n" )
// Create a reference decimal value.
let left = decimal 987.654
printfn $"""{"Left: decimal(987.654)",-46}{left}\n"""
// Create objects to compare with the reference.
compDecimalToObject left (decimal 9.8765400E+2 ) "decimal(9.8765400E+2)"
compDecimalToObject left 987.6541M "987.6541D"
compDecimalToObject left 987.6539M "987.6539D"
compDecimalToObject left (Decimal(987654000, 0, 0, false, 6uy)) "Decimal(987654000, 0, 0, false, 6)"
compDecimalToObject left 9.8765400E+2 "Double 9.8765400E+2"
compDecimalToObject left "987.654" "String \"987.654\""
// This example of the Decimal.Equals(object) and
// Decimal.CompareTo(object) methods generates the
// following output. It creates several different decimal
// values and compares them with the following reference value.
// Left: decimal(987.654) 987.654
//
// object: decimal(9.8765400E+2) 987.654
// left.Equals(object) True
// left.CompareTo(object) 0
//
// object: 987.6541D 987.6541
// left.Equals(object) False
// left.CompareTo(object) -1
//
// object: 987.6539D 987.6539
// left.Equals(object) False
// left.CompareTo(object) 1
//
// object: Decimal(987654000, 0, 0, false, 6) 987.654000
// left.Equals(object) True
// left.CompareTo(object) 0
//
// object: Double 9.8765400E+2 987.654
// left.Equals(object) False
// left.CompareTo(object) ArgumentException
//
// object: String "987.654" 987.654
// left.Equals(object) False
// left.CompareTo(object) ArgumentException
' Example of the Decimal.CompareTo and Decimal.Equals instance methods.
Module DecCompToEqualsObjDemo
' Get the exception type name; remove the namespace prefix.
Function GetExceptionType( ex As Exception ) As String
Dim exceptionType As String = ex.GetType( ).ToString( )
Return exceptionType.Substring( _
exceptionType.LastIndexOf( "."c ) + 1 )
End Function
' Compare the Decimal to the Object parameters,
' and display the Object parameters with the results.
Sub CompDecimalToObject( Left as Decimal, Right as Object, _
RightText as String )
Console.WriteLine( "{0,-46}{1}", "Object: " & RightText, _
Right )
Console.WriteLine( "{0,-46}{1}", "Left.Equals( Object )", _
Left.Equals( Right ) )
Console.Write( "{0,-46}", "Left.CompareTo( Object )" )
' Catch the exception if CompareTo( ) throws one.
Try
Console.WriteLine( "{0}" & vbCrLf, _
Left.CompareTo( Right ) )
Catch ex As Exception
Console.WriteLine( "{0}" & vbCrLf, _
GetExceptionType( ex ) )
End Try
End Sub
Sub Main( )
Console.WriteLine( _
"This example of the Decimal.Equals( Object ) " & _
"and " & vbCrLf & "Decimal.CompareTo( Object ) " & _
"methods generates the " & vbCrLf & _
"following output. It creates several different " & _
"Decimal " & vbCrLf & "values and compares them " & _
"with the following reference value." & vbCrLf )
' Create a reference Decimal value.
Dim Left as New Decimal( 987.654 )
Console.WriteLine( "{0,-46}{1}" & vbCrLf, _
"Left: Decimal( 987.654 )", Left )
' Create objects to compare with the reference.
CompDecimalToObject( Left, New Decimal( 9.8765400E+2 ), _
"Decimal( 9.8765400E+2 )" )
CompDecimalToObject( Left, 987.6541D, "987.6541D" )
CompDecimalToObject( Left, 987.6539D, "987.6539D" )
CompDecimalToObject( Left, _
New Decimal( 987654000, 0, 0, false, 6 ), _
"Decimal( 987654000, 0, 0, false, 6 )" )
CompDecimalToObject( Left, 9.8765400E+2, _
"Double 9.8765400E+2" )
CompDecimalToObject( Left, "987.654", _
"String ""987.654""" )
End Sub
End Module
' This example of the Decimal.Equals( Object ) and
' Decimal.CompareTo( Object ) methods generates the
' following output. It creates several different Decimal
' values and compares them with the following reference value.
'
' Left: Decimal( 987.654 ) 987.654
'
' Object: Decimal( 9.8765400E+2 ) 987.654
' Left.Equals( Object ) True
' Left.CompareTo( Object ) 0
'
' Object: 987.6541D 987.6541
' Left.Equals( Object ) False
' Left.CompareTo( Object ) -1
'
' Object: 987.6539D 987.6539
' Left.Equals( Object ) False
' Left.CompareTo( Object ) 1
'
' Object: Decimal( 987654000, 0, 0, false, 6 ) 987.654000
' Left.Equals( Object ) True
' Left.CompareTo( Object ) 0
'
' Object: Double 9.8765400E+2 987.654
' Left.Equals( Object ) False
' Left.CompareTo( Object ) ArgumentException
'
' Object: String "987.654" 987.654
' Left.Equals( Object ) False
' Left.CompareTo( Object ) ArgumentException
Remarques
Toute instance de Decimal, quelle que soit sa valeur, est considérée comme supérieure à null.
Le paramètre value doit être null ou une instance de Decimal; sinon, une exception est levée.
Voir aussi
S’applique à
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