Compartilhar via


Expression.Continue Método

Definição

Cria uma GotoExpression que representa uma instrução continue.

Sobrecargas

Continue(LabelTarget)

Cria uma GotoExpression que representa uma instrução continue.

Continue(LabelTarget, Type)

Cria uma GotoExpression que representa uma instrução continue com o tipo especificado.

Continue(LabelTarget)

Origem:
GotoExpression.cs
Origem:
GotoExpression.cs
Origem:
GotoExpression.cs

Cria uma GotoExpression que representa uma instrução continue.

public:
 static System::Linq::Expressions::GotoExpression ^ Continue(System::Linq::Expressions::LabelTarget ^ target);
public static System.Linq.Expressions.GotoExpression Continue (System.Linq.Expressions.LabelTarget target);
static member Continue : System.Linq.Expressions.LabelTarget -> System.Linq.Expressions.GotoExpression
Public Shared Function Continue (target As LabelTarget) As GotoExpression

Parâmetros

target
LabelTarget

O LabelTarget para o qual o GotoExpression irá.

Retornos

Um GotoExpression com Kind igual a Continue, a propriedade Target definida para target e um valor nulo a ser passado para o rótulo de destino ao saltar.

Exemplos

O exemplo a seguir demonstra como criar uma expressão de loop que usa o Continue método .

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

// A label that is used by a break statement and a loop.
LabelTarget breakLabel = Expression.Label();

// A label that is used by the Continue statement and the loop it refers to.
LabelTarget continueLabel = Expression.Label();

// This expression represents a Continue statement.
Expression continueExpr = Expression.Continue(continueLabel);

// A variable that triggers the exit from the loop.
ParameterExpression count = Expression.Parameter(typeof(int));

// A loop statement.
Expression loopExpr = Expression.Loop(
    Expression.Block(
        Expression.IfThen(
            Expression.GreaterThan(count, Expression.Constant(3)),
            Expression.Break(breakLabel)
        ),
        Expression.PreIncrementAssign(count),
        Expression.Call(
                    null,
                    typeof(Console).GetMethod("WriteLine", new Type[] { typeof(String) }),
                    Expression.Constant("Loop")
                ),
        continueExpr,
        Expression.PreDecrementAssign(count)
    ),
    breakLabel,
    continueLabel
);

// The following statement first creates an expression tree,
// then compiles it, and then runs it.
// Without the Continue statement, the loop would go on forever.
Expression.Lambda<Action<int>>(loopExpr, count).Compile()(1);

// This code example produces the following output:
//
// Loop
// Loop
// Loop
' Add the following directive to your file:
' Imports System.Linq.Expressions  

' A label that is used by a break statement and a loop. 
Dim breakLabel As LabelTarget = Expression.Label()

' A label that is used by the Continue statement and the loop it refers to.
Dim continueLabel As LabelTarget = Expression.Label()

' This expression represents a Continue statement.
Dim continueExpr As Expression = Expression.Continue(continueLabel)

' A variable that triggers the exit from the loop.
Dim count As ParameterExpression = Expression.Parameter(GetType(Integer))

' A loop statement.
Dim loopExpr As Expression = Expression.Loop(
       Expression.Block(
           Expression.IfThen(
               Expression.GreaterThan(count, Expression.Constant(3)),
               Expression.Break(breakLabel)
           ),
           Expression.PreIncrementAssign(count),
           Expression.Call(
                       Nothing,
                       GetType(Console).GetMethod("WriteLine", New Type() {GetType(String)}),
                       Expression.Constant("Loop")
                   ),
           continueExpr,
           Expression.PreDecrementAssign(count)
       ),
       breakLabel,
       continueLabel
   )

' The following statement first creates an expression tree,
' then compiles it, and then runs it.
' Without the Continue statement, the loop would go on forever.
Expression.Lambda(Of Action(Of Integer))(loopExpr, count).Compile()(1)

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

Aplica-se a

Continue(LabelTarget, Type)

Origem:
GotoExpression.cs
Origem:
GotoExpression.cs
Origem:
GotoExpression.cs

Cria uma GotoExpression que representa uma instrução continue com o tipo especificado.

public:
 static System::Linq::Expressions::GotoExpression ^ Continue(System::Linq::Expressions::LabelTarget ^ target, Type ^ type);
public static System.Linq.Expressions.GotoExpression Continue (System.Linq.Expressions.LabelTarget target, Type type);
static member Continue : System.Linq.Expressions.LabelTarget * Type -> System.Linq.Expressions.GotoExpression
Public Shared Function Continue (target As LabelTarget, type As Type) As GotoExpression

Parâmetros

target
LabelTarget

O LabelTarget para o qual o GotoExpression irá.

type
Type

Um Type para definir a propriedade Type igual a ele.

Retornos

Um GotoExpression com Kind igual a Continue, a propriedade Target definida para target, a propriedade Type definida para type e um valor nulo a ser passado para o rótulo de destino ao saltar.

Aplica-se a