CodeIterationStatement Classe

Definição

public ref class CodeIterationStatement : System::CodeDom::CodeStatement

[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class CodeIterationStatement : System.CodeDom.CodeStatement

[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type CodeIterationStatement = class
    inherit CodeStatement

Public Class CodeIterationStatement
Inherits CodeStatement

Herança

Object

CodeObject

CodeStatement

CodeIterationStatement

Atributos

ClassInterfaceAttribute ComVisibleAttribute SerializableAttribute

Exemplos

Este exemplo demonstra o uso de a CodeIterationStatement para representar um for ciclo.

// Declares and initializes an integer variable named testInt.
CodeVariableDeclarationStatement testInt = new CodeVariableDeclarationStatement(typeof(int), "testInt", new CodePrimitiveExpression(0) );

// Creates a for loop that sets testInt to 0 and continues incrementing testInt by 1 each loop until testInt is not less than 10.
CodeIterationStatement forLoop = new CodeIterationStatement(
    // initStatement parameter for pre-loop initialization.
    new CodeAssignStatement( new CodeVariableReferenceExpression("testInt"), new CodePrimitiveExpression(1) ),
    // testExpression parameter to test for continuation condition.
    new CodeBinaryOperatorExpression( new CodeVariableReferenceExpression("testInt"),
        CodeBinaryOperatorType.LessThan, new CodePrimitiveExpression(10) ),
    // incrementStatement parameter indicates statement to execute after each iteration.
    new CodeAssignStatement( new CodeVariableReferenceExpression("testInt"), new CodeBinaryOperatorExpression(
        new CodeVariableReferenceExpression("testInt"), CodeBinaryOperatorType.Add, new CodePrimitiveExpression(1) )),
    // statements parameter contains the statements to execute during each interation of the loop.
    // Each loop iteration the value of the integer is output using the Console.WriteLine method.
    new CodeStatement[] { new CodeExpressionStatement( new CodeMethodInvokeExpression( new CodeMethodReferenceExpression(
        new CodeTypeReferenceExpression("Console"), "WriteLine" ), new CodeMethodInvokeExpression(
        new CodeVariableReferenceExpression("testInt"), "ToString" ) ) ) } );

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

//     int testInt = 0;
//     for (testInt = 1; (testInt < 10); testInt = (testInt + 1)) {
//        Console.WriteLine(testInt.ToString());

 ' Declares and initializes an integer variable named testInt.
 Dim testInt As New CodeVariableDeclarationStatement(GetType(Integer), "testInt", New CodePrimitiveExpression(0))
 
 ' Creates a for loop that sets testInt to 0 and continues incrementing testInt by 1 each loop until testInt is not less than 10.
    ' initStatement parameter for pre-loop initialization.
    ' testExpression parameter indicates the epxression to test for continuation condition.
    ' incrementStatement parameter indicates statement to execute after each iteration.
    ' statements parameter contains the statements to execute during each interation of the loop.
    ' Each loop iteration the value of the integer is output using the Console.WriteLine method.

 Dim forLoop As New CodeIterationStatement( _
    New CodeAssignStatement(New CodeVariableReferenceExpression("testInt"), New CodePrimitiveExpression(1)), _
    New CodeBinaryOperatorExpression(New CodeVariableReferenceExpression("testInt"), _ 
        CodeBinaryOperatorType.LessThan, New CodePrimitiveExpression(10)), _
    New CodeAssignStatement(New CodeVariableReferenceExpression("testInt"), _
    New CodeBinaryOperatorExpression(New CodeVariableReferenceExpression("testInt"), _
        CodeBinaryOperatorType.Add, New CodePrimitiveExpression(1))), _
    New CodeStatement() {New CodeExpressionStatement( _
        New CodeMethodInvokeExpression(New CodeMethodReferenceExpression(New CodeTypeReferenceExpression("Console"), "WriteLine"), _ 
                New CodeMethodInvokeExpression(New CodeVariableReferenceExpression("testInt"), "ToString")))})


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

'     Dim testInt As Integer = 0
'     testInt = 1
'     Do While (testInt < 10)
'         Console.WriteLine(testInt.ToString)
'         testInt = (testInt + 1)

Observações

A CodeIterationStatement pode representar um for laço ou while laço.

A InitStatement propriedade especifica a instrução a executar antes da primeira iteração do ciclo. A TestExpression propriedade especifica a expressão de continuação do ciclo, que deve avaliar até true no final de cada iteração do ciclo para que outra iteração comece. A IncrementStatement propriedade especifica a instrução a executar no final de cada iteração do ciclo. A Statements propriedade especifica a coleção de instruções a executar dentro do ciclo.