Expression.Increment 方法

定义

创建一个 UnaryExpression 表示表达式值递增的 1。

重载

名称 说明
Increment(Expression, MethodInfo)

创建一个表示表达式递增 1 的表达式 UnaryExpression

Increment(Expression)

创建一个 UnaryExpression 表示表达式值递增的 1。

Increment(Expression, MethodInfo)

创建一个表示表达式递增 1 的表达式 UnaryExpression

public:
 static System::Linq::Expressions::UnaryExpression ^ Increment(System::Linq::Expressions::Expression ^ expression, System::Reflection::MethodInfo ^ method);
public static System.Linq.Expressions.UnaryExpression Increment(System.Linq.Expressions.Expression expression, System.Reflection.MethodInfo method);
static member Increment : System.Linq.Expressions.Expression * System.Reflection.MethodInfo -> System.Linq.Expressions.UnaryExpression
Public Shared Function Increment (expression As Expression, method As MethodInfo) As UnaryExpression

参数

expression
Expression

要递增的一个 Expression

method
MethodInfo

表示实现方法的 A MethodInfo

返回

一个表示递增表达式的表达式 UnaryExpression

注解

此表达式功能正常,不会更改传递给该表达式的对象的值。

适用于

Increment(Expression)

创建一个 UnaryExpression 表示表达式值递增的 1。

public:
 static System::Linq::Expressions::UnaryExpression ^ Increment(System::Linq::Expressions::Expression ^ expression);
public static System.Linq.Expressions.UnaryExpression Increment(System.Linq.Expressions.Expression expression);
static member Increment : System.Linq.Expressions.Expression -> System.Linq.Expressions.UnaryExpression
Public Shared Function Increment (expression As Expression) As UnaryExpression

参数

expression
Expression

要递增的一个 Expression

返回

一个表示递增表达式的表达式 UnaryExpression

示例

下面的代码示例演示如何创建表示递增操作的表达式。

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

// This expression represents an increment operation.
double num = 5.5;
Expression incrementExpr = Expression.Increment(
                            Expression.Constant(num)
                        );

// Print out the expression.
Console.WriteLine(incrementExpr.ToString());

// The following statement first creates an expression tree,
// then compiles it, and then executes it.
Console.WriteLine(Expression.Lambda<Func<double>>(incrementExpr).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:
//
// Increment(5.5)
// 6.5
// object: 5.5
'Add the following directive to your file:
' Imports System.Linq.Expressions   

Dim num As Double = 5.5
' This expression represents an increment operation. 
Dim incrementExpr As Expression = Expression.Increment(
                            Expression.Constant(num)
                        )

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

' The following statement first creates an expression tree,
' then compiles it, and then executes it.
Console.WriteLine(Expression.Lambda(Of Func(Of Double))(incrementExpr).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:
'
' Increment(5.5)
' 6.5
' object: 5.5

注解

此表达式功能正常,不会更改传递给该表达式的对象的值。

适用于