FieldDirection Enumeração

Definição

Define os identificadores usados para indicar a direção das declarações de parâmetro e argumento.Defines identifiers used to indicate the direction of parameter and argument declarations.

public enum class FieldDirection
public enum FieldDirection
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public enum FieldDirection
type FieldDirection = 
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type FieldDirection = 
Public Enum FieldDirection
Herança
FieldDirection
Atributos

Campos

In 0

Um campo de entrada.An incoming field.

Out 1

Um campo de saída.An outgoing field.

Ref 2

Um campo por referência.A field by reference.

Exemplos

O exemplo a seguir demonstra o uso de FieldDirection para indicar os tipos de direção de campo dos parâmetros de um método em uma declaração de método.The following example demonstrates use of FieldDirection to indicate the field direction types of the parameters of a method in a method declaration.

// Declares a method.
CodeMemberMethod^ method1 = gcnew CodeMemberMethod;
method1->Name = "TestMethod";

// Declares a string parameter passed by reference.
CodeParameterDeclarationExpression^ param1 = gcnew CodeParameterDeclarationExpression( "System.String","stringParam" );
param1->Direction = FieldDirection::Ref;
method1->Parameters->Add( param1 );

// Declares a Int32 parameter passed by incoming field.
CodeParameterDeclarationExpression^ param2 = gcnew CodeParameterDeclarationExpression( "System.Int32","intParam" );
param2->Direction = FieldDirection::Out;
method1->Parameters->Add( param2 );

// A C# code generator produces the following source code for the preceeding example code:
//        private void TestMethod(ref string stringParam, out int intParam) {
//        }
// Declares a method.
CodeMemberMethod method1 = new CodeMemberMethod();
method1.Name = "TestMethod";

// Declares a string parameter passed by reference.
CodeParameterDeclarationExpression param1 = new CodeParameterDeclarationExpression("System.String", "stringParam");
param1.Direction = FieldDirection.Ref;
method1.Parameters.Add(param1);

// Declares a Int32 parameter passed by incoming field.
CodeParameterDeclarationExpression param2 = new CodeParameterDeclarationExpression("System.Int32", "intParam");
param2.Direction = FieldDirection.Out;
method1.Parameters.Add(param2);

// A C# code generator produces the following source code for the preceeding example code:

//        private void TestMethod(ref string stringParam, out int intParam) {
//        }
           ' Declares a method.
           Dim method1 As New CodeMemberMethod()
           method1.Name = "TestMethod"

           ' Declares a string parameter passed by reference.
           Dim param1 As New CodeParameterDeclarationExpression("System.String", "stringParam")
           param1.Direction = FieldDirection.Ref
           method1.Parameters.Add(param1)

           ' Declares a Int32 parameter passed by incoming field.
           Dim param2 As New CodeParameterDeclarationExpression("System.Int32", "intParam")
           param2.Direction = FieldDirection.Out
           method1.Parameters.Add(param2)

           ' A Visual Basic code generator produces the following source code for the preceeding example code:

           '	 Private Sub TestMethod(ByRef stringParam As String, ByRef intParam As Integer)
           '    End Sub

Comentários

FieldDirection permite passar argumentos para funções por referência ou usar parâmetros de entrada ou saída.FieldDirection allows for passing arguments to functions by reference, or using incoming or outgoing parameters.

Aplica-se a

Confira também