Expression.Break Yöntem

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

public:
 static System::Linq::Expressions::GotoExpression ^ Break(System::Linq::Expressions::LabelTarget ^ target);

public static System.Linq.Expressions.GotoExpression Break (System.Linq.Expressions.LabelTarget target);

static member Break : System.Linq.Expressions.LabelTarget -> System.Linq.Expressions.GotoExpression

Public Shared Function Break (target As LabelTarget) As GotoExpression

Parametreler

Döndürülenler

GotoExpression Break değerine eşit olanKind, Target özelliği olarak targetayarlanmış ve atlayarak hedef etikete geçirilecek bir null değer.

Örnekler

Aşağıdaki örnek, yöntemini kullanan bir nesne içeren bir LoopExpression ifadenin Break nasıl oluşturulacağını gösterir.

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

// Creating a parameter expression.
ParameterExpression value = Expression.Parameter(typeof(int), "value");

// Creating an expression to hold a local variable.
ParameterExpression result = Expression.Parameter(typeof(int), "result");

// Creating a label to jump to from a loop.
LabelTarget label = Expression.Label(typeof(int));

// Creating a method body.
BlockExpression block = Expression.Block(
    new[] { result },
    Expression.Assign(result, Expression.Constant(1)),
        Expression.Loop(
           Expression.IfThenElse(
               Expression.GreaterThan(value, Expression.Constant(1)),
               Expression.MultiplyAssign(result,
                   Expression.PostDecrementAssign(value)),
               Expression.Break(label, result)
           ),
       label
    )
);

// Compile and run an expression tree.
int factorial = Expression.Lambda<Func<int, int>>(block, value).Compile()(5);

Console.WriteLine(factorial);

// This code example produces the following output:
//
// 120

' Add the following directive to the file:
' Imports System.Linq.Expressions  

' Creating a parameter expression.
Dim value As ParameterExpression =
    Expression.Parameter(GetType(Integer), "value")

' Creating an expression to hold a local variable. 
Dim result As ParameterExpression =
    Expression.Parameter(GetType(Integer), "result")

' Creating a label to jump to from a loop.
Dim label As LabelTarget = Expression.Label(GetType(Integer))

' Creating a method body.
Dim block As BlockExpression = Expression.Block(
    New ParameterExpression() {result},
    Expression.Assign(result, Expression.Constant(1)),
    Expression.Loop(
        Expression.IfThenElse(
            Expression.GreaterThan(value, Expression.Constant(1)),
            Expression.MultiplyAssign(result,
                Expression.PostDecrementAssign(value)),
            Expression.Break(label, result)
        ),
        label
    )
)

' Compile an expression tree and return a delegate.
Dim factorial As Integer =
    Expression.Lambda(Of Func(Of Integer, Integer))(block, value).Compile()(5)

Console.WriteLine(factorial)

' This code example produces the following output:
'
' 120

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

public:
 static System::Linq::Expressions::GotoExpression ^ Break(System::Linq::Expressions::LabelTarget ^ target, System::Linq::Expressions::Expression ^ value);

public static System.Linq.Expressions.GotoExpression Break (System.Linq.Expressions.LabelTarget target, System.Linq.Expressions.Expression value);

public static System.Linq.Expressions.GotoExpression Break (System.Linq.Expressions.LabelTarget target, System.Linq.Expressions.Expression? value);

static member Break : System.Linq.Expressions.LabelTarget * System.Linq.Expressions.Expression -> System.Linq.Expressions.GotoExpression

Public Shared Function Break (target As LabelTarget, value As Expression) As GotoExpression

Parametreler

Döndürülenler

GotoExpression Break değerine eşit olanKind, Target özelliği olarak targetayarlanmış ve value atlama sonrasında hedef etikete geçirilecek.

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

public:
 static System::Linq::Expressions::GotoExpression ^ Break(System::Linq::Expressions::LabelTarget ^ target, Type ^ type);

public static System.Linq.Expressions.GotoExpression Break (System.Linq.Expressions.LabelTarget target, Type type);

static member Break : System.Linq.Expressions.LabelTarget * Type -> System.Linq.Expressions.GotoExpression

Public Shared Function Break (target As LabelTarget, type As Type) As GotoExpression

Parametreler

Döndürülenler

GotoExpression Break değerine eşit olan Kind bir, Target özelliği olaraktarget, özelliği ise Type olarak ayarlanmıştırtype.

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

Kaynak:

GotoExpression.cs

public:
 static System::Linq::Expressions::GotoExpression ^ Break(System::Linq::Expressions::LabelTarget ^ target, System::Linq::Expressions::Expression ^ value, Type ^ type);

public static System.Linq.Expressions.GotoExpression Break (System.Linq.Expressions.LabelTarget target, System.Linq.Expressions.Expression value, Type type);

public static System.Linq.Expressions.GotoExpression Break (System.Linq.Expressions.LabelTarget target, System.Linq.Expressions.Expression? value, Type type);

static member Break : System.Linq.Expressions.LabelTarget * System.Linq.Expressions.Expression * Type -> System.Linq.Expressions.GotoExpression

Public Shared Function Break (target As LabelTarget, value As Expression, type As Type) As GotoExpression

Parametreler

Döndürülenler

GotoExpression Break değerine eşit olanKind, Target özelliği olarak targetayarlanmış, Type özelliği olarak ayarlanmış typeve value atlayarak hedef etikete geçirilecek.