MemberExpression Klass

Definition

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

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

public class MemberExpression : System.Linq.Expressions.Expression

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

type MemberExpression = class
    inherit Expression

Public Class MemberExpression
Inherits Expression

Public NotInheritable Class MemberExpression
Inherits Expression

Arv

Object

Expression

MemberExpression

Exempel

I följande exempel skapas en MemberExpression som representerar att hämta värdet för en fältmedlem.

class Animal
{
    public string species;
}

public static void CreateFieldExpression()
{
    Animal horse = new Animal();

    // Create a MemberExpression that represents getting
    // the value of the 'species' field of class 'Animal'.
    System.Linq.Expressions.MemberExpression memberExpression =
        System.Linq.Expressions.Expression.Field(
            System.Linq.Expressions.Expression.Constant(horse),
            "species");

    Console.WriteLine(memberExpression.ToString());

    // This code produces the following output:
    //
    // value(CodeSnippets.FieldExample+Animal).species
}

Class Animal
    Dim species As String
End Class

Shared Sub CreateFieldExpression()
    Dim horse As New Animal

    ' Create a MemberExpression that represents getting
    ' the value of the 'species' field of class 'Animal'.
    Dim memberExpression As System.Linq.Expressions.MemberExpression = _
        System.Linq.Expressions.Expression.Field( _
            System.Linq.Expressions.Expression.Constant(horse), _
            "species")

    Console.WriteLine(memberExpression.ToString())

    ' This code produces the following output:
    '
    ' value(ExpressionVB.FieldExample+Animal).species
End Sub

Kommentarer

FieldAnvänd metoderna , Property eller PropertyOrField factory för att skapa en MemberExpression.

Värdet för NodeType egenskapen för en MemberExpression är MemberAccess.