Expression.AddAssign 方法

定義

建立 BinaryExpression,表示不含溢位檢查的加法指派運算。Creates a BinaryExpression that represents an addition assignment operation that does not have overflow checking.

多載

AddAssign(Expression, Expression)

建立 BinaryExpression,表示不含溢位檢查的加法指派運算。Creates a BinaryExpression that represents an addition assignment operation that does not have overflow checking.

AddAssign(Expression, Expression, MethodInfo)

建立 BinaryExpression,表示不含溢位檢查的加法指派運算。Creates a BinaryExpression that represents an addition assignment operation that does not have overflow checking.

AddAssign(Expression, Expression, MethodInfo, LambdaExpression)

建立 BinaryExpression,表示不含溢位檢查的加法指派運算。Creates a BinaryExpression that represents an addition assignment operation that does not have overflow checking.

AddAssign(Expression, Expression)

建立 BinaryExpression,表示不含溢位檢查的加法指派運算。Creates a BinaryExpression that represents an addition assignment operation that does not have overflow checking.

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

參數

left
Expression

要將 Expression 屬性設定為與之相等的 LeftAn Expression to set the Left property equal to.

right
Expression

要將 Expression 屬性設定為與之相等的 RightAn Expression to set the Right property equal to.

傳回

BinaryExpression

BinaryExpression,其 NodeType 屬性等於 AddAssign,且 LeftRight 屬性設定為指定的值。A BinaryExpression that has the NodeType property equal to AddAssign and the Left and Right properties set to the specified values.

範例

下列程式碼範例示範如何建立運算式,以將值加入至整數變數,然後將作業的結果指派給變數。The following code example shows how to create an expression that adds a value to an integer variable and then assigns the result of the operation to the 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

適用於

AddAssign(Expression, Expression, MethodInfo)

建立 BinaryExpression,表示不含溢位檢查的加法指派運算。Creates a BinaryExpression that represents an addition assignment operation that does not have overflow checking.

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);
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

參數

left
Expression

要將 Expression 屬性設定為與之相等的 LeftAn Expression to set the Left property equal to.

right
Expression

要將 Expression 屬性設定為與之相等的 RightAn Expression to set the Right property equal to.

method
MethodInfo

要將 MethodInfo 屬性設定為與之相等的 MethodA MethodInfo to set the Method property equal to.

傳回

BinaryExpression

BinaryExpression,其 NodeType 屬性等於 AddAssign,且 LeftRightMethod 屬性設定為指定的值。A BinaryExpression that has the NodeType property equal to AddAssign and the Left, Right, and Method properties set to the specified values.

適用於

AddAssign(Expression, Expression, MethodInfo, LambdaExpression)

建立 BinaryExpression,表示不含溢位檢查的加法指派運算。Creates a BinaryExpression that represents an addition assignment operation that does not have overflow checking.

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);
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

參數

left
Expression

要將 Expression 屬性設定為與之相等的 LeftAn Expression to set the Left property equal to.

right
Expression

要將 Expression 屬性設定為與之相等的 RightAn Expression to set the Right property equal to.

method
MethodInfo

要將 MethodInfo 屬性設定為與之相等的 MethodA MethodInfo to set the Method property equal to.

conversion
LambdaExpression

要將 LambdaExpression 屬性設定為與之相等的 ConversionA LambdaExpression to set the Conversion property equal to.

傳回

BinaryExpression

BinaryExpression,其 NodeType 屬性等於 AddAssign,且 LeftRightMethodConversion 屬性設定為指定的值。A BinaryExpression that has the NodeType property equal to AddAssign and the Left, Right, Method, and Conversion properties set to the specified values.

適用於