Expression.Decrement Metode

Definisi

Ruang nama:

System.Linq.Expressions

Rakitan:

System.Linq.Expressions.dll

UnaryExpression Membuat yang mewakili penurunan ekspresi dengan 1.

Overload

Decrement(Expression)	UnaryExpression Membuat yang mewakili penurunan ekspresi dengan 1.
Decrement(Expression, MethodInfo)	UnaryExpression Membuat yang mewakili penurunan ekspresi dengan 1.

Decrement(Expression)

Sumber:

UnaryExpression.cs

UnaryExpression Membuat yang mewakili penurunan ekspresi dengan 1.

public:
 static System::Linq::Expressions::UnaryExpression ^ Decrement(System::Linq::Expressions::Expression ^ expression);

public static System.Linq.Expressions.UnaryExpression Decrement (System.Linq.Expressions.Expression expression);

static member Decrement : System.Linq.Expressions.Expression -> System.Linq.Expressions.UnaryExpression

Public Shared Function Decrement (expression As Expression) As UnaryExpression

Parameter

expression

Expression

Sebuah Expression kemusnahan.

Mengembalikan

UnaryExpression

UnaryExpression yang mewakili ekspresi yang direkrementasi.

Contoh

Contoh kode berikut menunjukkan cara membuat ekspresi yang mengurangi 1 dari nilai tertentu.

// Add the following directive to your file:
// using System.Linq.Expressions;

double num = 5.5;

// This expression represents a decrement operation
// that subtracts 1 from a value.
Expression decrementExpr = Expression.Decrement(
                            Expression.Constant(num)
                        );

// Print expression.
Console.WriteLine(decrementExpr.ToString());

// The following statement first creates an expression tree,
// then compiles it, and then executes it.
Console.WriteLine(
    Expression.Lambda<Func<double>>(decrementExpr).Compile()());

// The value of the variable did not change,
// because the expression is functional.
Console.WriteLine("object: " + num);

// This code example produces the following output:
//
// Decrement(5.5)
// 4.5
// object: 5.5

' Add the following directive to your file:
' Imports System.Linq.Expressions   

Dim num As Double = 5.5

' This expression represents a decrement operation 
' that subtracts 1 from a value. 
Dim decrementExpr As Expression = Expression.Decrement(
                            Expression.Constant(num)
                        )

' Print the expression.
Console.WriteLine(decrementExpr.ToString())

' The following statement first creates an expression tree,
' then compiles it, and then executes it.
Console.WriteLine(
    Expression.Lambda(Of Func(Of Double))(decrementExpr).Compile()())

' The value of the variable did not change,
' because the expression is functional.
Console.WriteLine("object: " & num)

' This code example produces the following output:
'
' Decrement(5.5)
' 4.5
' object: 5.5

Keterangan

Ekspresi ini berfungsi dan tidak mengubah nilai objek yang diteruskan ke dalamnya.

Decrement(Expression, MethodInfo)

Sumber:

UnaryExpression.cs

UnaryExpression Membuat yang mewakili penurunan ekspresi dengan 1.

public:
 static System::Linq::Expressions::UnaryExpression ^ Decrement(System::Linq::Expressions::Expression ^ expression, System::Reflection::MethodInfo ^ method);

public static System.Linq.Expressions.UnaryExpression Decrement (System.Linq.Expressions.Expression expression, System.Reflection.MethodInfo? method);

static member Decrement : System.Linq.Expressions.Expression * System.Reflection.MethodInfo -> System.Linq.Expressions.UnaryExpression

Public Shared Function Decrement (expression As Expression, method As MethodInfo) As UnaryExpression

Parameter

expression

Expression

Sebuah Expression kemusnahan.

method

MethodInfo

MethodInfo yang mewakili metode penerapan.

Mengembalikan

UnaryExpression

UnaryExpression yang mewakili ekspresi yang direkrementasi.

Keterangan

Ekspresi ini berfungsi dan tidak mengubah nilai objek yang diteruskan ke dalamnya.