Expression.AddAssign Método

Definición

Espacio de nombres:

System.Linq.Expressions

Ensamblado:

System.Linq.Expressions.dll

Crea un objeto BinaryExpression que representa una operación de asignación y suma sin comprobación de desbordamiento.

Sobrecargas

AddAssign(Expression, Expression)	Crea un objeto BinaryExpression que representa una operación de asignación y suma sin comprobación de desbordamiento.
AddAssign(Expression, Expression, MethodInfo)	Crea un objeto BinaryExpression que representa una operación de asignación y suma sin comprobación de desbordamiento.
AddAssign(Expression, Expression, MethodInfo, LambdaExpression)	Crea un objeto BinaryExpression que representa una operación de asignación y suma sin comprobación de desbordamiento.

AddAssign(Expression, Expression)

Crea un objeto BinaryExpression que representa una operación de asignación y suma sin comprobación de desbordamiento.

public:
 static System::Linq::Expressions::BinaryExpression ^ AddAssign(System::Linq::Expressions::Expression ^ left, System::Linq::Expressions::Expression ^ right);

public static System.Linq.Expressions.BinaryExpression AddAssign (System.Linq.Expressions.Expression left, System.Linq.Expressions.Expression right);

static member AddAssign : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression -> System.Linq.Expressions.BinaryExpression

Public Shared Function AddAssign (left As Expression, right As Expression) As BinaryExpression

Parámetros

left

Expression

Objeto Expression en el que se va a establecer la propiedad Left.

right

Expression

Objeto Expression en el que se va a establecer la propiedad Right.

Devoluciones

BinaryExpression

BinaryExpression cuya propiedad NodeType es AddAssign y cuyas propiedades Left y Right se establecen en los valores especificados.

Ejemplos

En el ejemplo de código siguiente se muestra cómo crear una expresión que agrega un valor a una variable entera y, a continuación, asigna el resultado de la operación a la variable .

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

// The Parameter expression is used to create a variable.
ParameterExpression variableExpr = Expression.Variable(typeof(int), "sampleVar");

// The block expression enables you to execute several expressions sequentually.
// In this bloc, the variable is first initialized with 1.
// Then the AddAssign method adds 2 to the variable and assigns the result to the variable.
BlockExpression addAssignExpr = Expression.Block(
    new ParameterExpression[] { variableExpr },
    Expression.Assign(variableExpr, Expression.Constant(1)),
    Expression.AddAssign(
        variableExpr,
        Expression.Constant(2)
    )
);

// Print out the expression from the block expression.
Console.WriteLine("The expressions from the block expression:");
foreach (var expr in addAssignExpr.Expressions)
    Console.WriteLine(expr.ToString());

Console.WriteLine("The result of executing the expression tree:");
// The following statement first creates an expression tree,
// then compiles it, and then executes it.
Console.WriteLine(Expression.Lambda<Func<int>>(addAssignExpr).Compile()());

// This code example produces the following output:
//
// The expressions from the block expression:
// (sampleVar = 1)
// (sampleVar += 2)

// The result of executing the expression tree:
// 3

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

' The parameter expression is used to create a variable.
Dim variableExpr As ParameterExpression = Expression.Variable(GetType(Integer), "sampleVar")

' The block expression enables you to execute several expressions sequentually.
' In this block, the variable is first initialized with 1. 
' Then the AddAssign method adds 2 to the variable and assigns the result to the variable.
Dim addAssignExpr As BlockExpression = Expression.Block(
    New ParameterExpression() {variableExpr},
    Expression.Assign(variableExpr, Expression.Constant(1)),
    Expression.AddAssign(
        variableExpr,
        Expression.Constant(2)
    )
)

' Print the expression from the block expression.
Console.WriteLine("The expressions from the block expression:")
For Each expr As Expression In addAssignExpr.Expressions
    Console.WriteLine(expr.ToString())
Next

Console.WriteLine("The result of executing the expression tree:")
' The following statement first creates an expression tree,
' then compiles it, and then executes it.
Console.WriteLine(Expression.Lambda(Of Func(Of Integer))(addAssignExpr).Compile()())

' This code example produces the following output:
'
' The expressions from the block expression:
' (sampleVar = 1)
' (sampleVar += 2)

' The result of executing the expression tree:
' 3

AddAssign(Expression, Expression, MethodInfo)

Crea un objeto BinaryExpression que representa una operación de asignación y suma sin comprobación de desbordamiento.

public:
 static System::Linq::Expressions::BinaryExpression ^ AddAssign(System::Linq::Expressions::Expression ^ left, System::Linq::Expressions::Expression ^ right, System::Reflection::MethodInfo ^ method);

public static System.Linq.Expressions.BinaryExpression AddAssign (System.Linq.Expressions.Expression left, System.Linq.Expressions.Expression right, System.Reflection.MethodInfo? method);

static member AddAssign : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Reflection.MethodInfo -> System.Linq.Expressions.BinaryExpression

Public Shared Function AddAssign (left As Expression, right As Expression, method As MethodInfo) As BinaryExpression

Parámetros

left

Expression

Objeto Expression en el que se va a establecer la propiedad Left.

right

Expression

Objeto Expression en el que se va a establecer la propiedad Right.

method

MethodInfo

MethodInfo en el que se va a establecer la propiedad Method.

Devoluciones

BinaryExpression

BinaryExpression cuya propiedad NodeType es AddAssign y Left, Right y Method se establecen en los valores especificados.

AddAssign(Expression, Expression, MethodInfo, LambdaExpression)

Crea un objeto BinaryExpression que representa una operación de asignación y suma sin comprobación de desbordamiento.

public:
 static System::Linq::Expressions::BinaryExpression ^ AddAssign(System::Linq::Expressions::Expression ^ left, System::Linq::Expressions::Expression ^ right, System::Reflection::MethodInfo ^ method, System::Linq::Expressions::LambdaExpression ^ conversion);

public static System.Linq.Expressions.BinaryExpression AddAssign (System.Linq.Expressions.Expression left, System.Linq.Expressions.Expression right, System.Reflection.MethodInfo? method, System.Linq.Expressions.LambdaExpression? conversion);

static member AddAssign : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Reflection.MethodInfo * System.Linq.Expressions.LambdaExpression -> System.Linq.Expressions.BinaryExpression

Public Shared Function AddAssign (left As Expression, right As Expression, method As MethodInfo, conversion As LambdaExpression) As BinaryExpression

Parámetros

left

Expression

Objeto Expression en el que se va a establecer la propiedad Left.

right

Expression

Objeto Expression en el que se va a establecer la propiedad Right.

method

MethodInfo

MethodInfo en el que se va a establecer la propiedad Method.

conversion

LambdaExpression

LambdaExpression en el que se va a establecer la propiedad Conversion.

Devoluciones

BinaryExpression

BinaryExpression cuya propiedad NodeType es AddAssign y Left, Right, Method y Conversion se establecen en los valores especificados.