MethodCallExpression Klass

Definition

public ref class MethodCallExpression : System::Linq::Expressions::Expression, System::Linq::Expressions::IArgumentProvider

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

public ref class MethodCallExpression : System::Linq::Expressions::Expression

public class MethodCallExpression : System.Linq.Expressions.Expression, System.Linq.Expressions.IArgumentProvider

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

public class MethodCallExpression : System.Linq.Expressions.Expression

type MethodCallExpression = class
    inherit Expression
    interface IArgumentProvider

type MethodCallExpression = class
    inherit Expression

Public Class MethodCallExpression
Inherits Expression
Implements IArgumentProvider

Public NotInheritable Class MethodCallExpression
Inherits Expression

Public Class MethodCallExpression
Inherits Expression

Arv

Object

Expression

MethodCallExpression

Implementeringar

IArgumentProvider

Exempel

I följande exempel skapas ett MethodCallExpression objekt som representerar indexering i en tvådimensionell matris.

string[,] gradeArray =
    { {"chemistry", "history", "mathematics"}, {"78", "61", "82"} };

System.Linq.Expressions.Expression arrayExpression =
    System.Linq.Expressions.Expression.Constant(gradeArray);

// Create a MethodCallExpression that represents indexing
// into the two-dimensional array 'gradeArray' at (0, 2).
// Executing the expression would return "mathematics".
System.Linq.Expressions.MethodCallExpression methodCallExpression =
    System.Linq.Expressions.Expression.ArrayIndex(
        arrayExpression,
        System.Linq.Expressions.Expression.Constant(0),
        System.Linq.Expressions.Expression.Constant(2));

Console.WriteLine(methodCallExpression.ToString());

// This code produces the following output:
//
// value(System.String[,]).Get(0, 2)

Dim gradeArray(,) As String = _
    {{"chemistry", "history", "mathematics"}, {"78", "61", "82"}}

Dim arrayExpression As System.Linq.Expressions.Expression = _
    System.Linq.Expressions.Expression.Constant(gradeArray)

' Create a MethodCallExpression that represents indexing
' into the two-dimensional array 'gradeArray' at (0, 2).
' Executing the expression would return "mathematics".
Dim methodCallExpression As System.Linq.Expressions.MethodCallExpression = _
    System.Linq.Expressions.Expression.ArrayIndex( _
        arrayExpression, _
        System.Linq.Expressions.Expression.Constant(0), _
        System.Linq.Expressions.Expression.Constant(2))

Console.WriteLine(methodCallExpression.ToString())

' This code produces the following output:
'
' value(System.String[,]).Get(0, 2)

Kommentarer

CallAnvänd metoden , ArrayIndexeller ArrayIndex fabriksmetoden för att skapa en MethodCallExpression.

Värdet för egenskapen för NodeType ett MethodCallExpression objekt är Call.