InvocationExpression Klass

Definition

public ref class InvocationExpression sealed : System::Linq::Expressions::Expression, System::Linq::Expressions::IArgumentProvider

public ref class InvocationExpression sealed : System::Linq::Expressions::Expression

public sealed class InvocationExpression : System.Linq.Expressions.Expression, System.Linq.Expressions.IArgumentProvider

public sealed class InvocationExpression : System.Linq.Expressions.Expression

type InvocationExpression = class
    inherit Expression
    interface IArgumentProvider

type InvocationExpression = class
    inherit Expression

Public NotInheritable Class InvocationExpression
Inherits Expression
Implements IArgumentProvider

Public NotInheritable Class InvocationExpression
Inherits Expression

Arv

Object

Expression

InvocationExpression

Implementeringar

IArgumentProvider

Exempel

I följande exempel skapas ett InvocationExpression som representerar att anropa ett lambda-uttryck med angivna argument.

System.Linq.Expressions.Expression<Func<int, int, bool>> largeSumTest =
    (num1, num2) => (num1 + num2) > 1000;

// Create an InvocationExpression that represents applying
// the arguments '539' and '281' to the lambda expression 'largeSumTest'.
System.Linq.Expressions.InvocationExpression invocationExpression =
    System.Linq.Expressions.Expression.Invoke(
        largeSumTest,
        System.Linq.Expressions.Expression.Constant(539),
        System.Linq.Expressions.Expression.Constant(281));

Console.WriteLine(invocationExpression.ToString());

// This code produces the following output:
//
// Invoke((num1, num2) => ((num1 + num2) > 1000),539,281)

Dim largeSumTest As System.Linq.Expressions.Expression(Of System.Func(Of Integer, Integer, Boolean)) = _
    Function(num1, num2) (num1 + num2) > 1000

' Create an InvocationExpression that represents applying
' the arguments '539' and '281' to the lambda expression 'largeSumTest'.
Dim invocationExpression As System.Linq.Expressions.InvocationExpression = _
    System.Linq.Expressions.Expression.Invoke( _
        largeSumTest, _
        System.Linq.Expressions.Expression.Constant(539), _
        System.Linq.Expressions.Expression.Constant(281))

Console.WriteLine(invocationExpression.ToString())

' This code produces the following output:
'
' Invoke((num1, num2) => ((num1 + num2) > 1000),539,281)

Kommentarer

Använd fabriksmetoderna Invoke för att skapa en InvocationExpression.

En NodeType är InvocationExpressionInvoke.