CodeIterationStatement Kelas

Definisi

Ruang nama:

System.CodeDom

Rakitan:

System.CodeDom.dll

Paket:

System.CodeDom v8.0.0

Sumber:

CodeIterationStatement.cs

for Mewakili pernyataan, atau perulangan melalui blok pernyataan, menggunakan ekspresi pengujian sebagai kondisi untuk terus mengulang.

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

public class CodeIterationStatement : System.CodeDom.CodeStatement

type CodeIterationStatement = class
    inherit CodeStatement

Public Class CodeIterationStatement
Inherits CodeStatement

Warisan

Object

CodeObject

CodeStatement

CodeIterationStatement

Contoh

Contoh ini menunjukkan penggunaan CodeIterationStatement untuk mewakili perulangan for .

// Declares and initializes an integer variable named testInt.
CodeVariableDeclarationStatement^ testInt = gcnew CodeVariableDeclarationStatement( int::typeid,"testInt",gcnew CodePrimitiveExpression( (int^)0 ) );
array<CodeMethodInvokeExpression^>^writelineparams = {gcnew CodeMethodInvokeExpression( gcnew CodeVariableReferenceExpression( "testInt" ),"ToString",nullptr )};
array<CodeStatement^>^codestatements = {gcnew CodeExpressionStatement( gcnew CodeMethodInvokeExpression( gcnew CodeMethodReferenceExpression( gcnew CodeTypeReferenceExpression( "Console" ),"WriteLine" ),writelineparams ) )};

// Creates a for loop that sets testInt to 0 and continues incrementing testInt by 1 each loop until testInt is not less than 10.

// Each loop iteration the value of the integer is output using the Console.WriteLine method.
CodeIterationStatement^ forLoop = gcnew CodeIterationStatement( gcnew CodeAssignStatement( gcnew CodeVariableReferenceExpression( "testInt" ),gcnew CodePrimitiveExpression( 1 ) ),gcnew CodeBinaryOperatorExpression( gcnew CodeVariableReferenceExpression( "testInt" ),CodeBinaryOperatorType::LessThan,gcnew CodePrimitiveExpression( 10 ) ),gcnew CodeAssignStatement( gcnew CodeVariableReferenceExpression( "testInt" ),gcnew CodeBinaryOperatorExpression( gcnew CodeVariableReferenceExpression( "testInt" ),CodeBinaryOperatorType::Add,gcnew CodePrimitiveExpression( 1 ) ) ),codestatements );

// 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.
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)

Keterangan

CodeIterationStatement dapat mewakili perulangan for atau while perulangan.

Properti InitStatement menentukan pernyataan yang akan dijalankan sebelum perulangan perulangan pertama. Properti TestExpression menentukan ekspresi kelanjutan perulangan, yang harus dievaluasi true di akhir setiap iterasi perulangan agar iterasi lain dimulai. Properti IncrementStatement menentukan pernyataan untuk dijalankan di akhir setiap iterasi perulangan. Properti Statements menentukan kumpulan pernyataan yang akan dijalankan dalam perulangan.

Konstruktor

CodeIterationStatement()	Menginisialisasi instans baru kelas CodeIterationStatement.
CodeIterationStatement(CodeStatement, CodeExpression, CodeStatement, CodeStatement[])	Menginisialisasi instans CodeIterationStatement baru kelas menggunakan parameter yang ditentukan.

Properti

EndDirectives	CodeDirectiveCollection Mendapatkan objek yang berisi arahan akhir. (Diperoleh dari CodeStatement)
IncrementStatement	Mendapatkan atau mengatur pernyataan yang dipanggil setelah setiap siklus perulangan.
InitStatement	Mendapatkan atau mengatur pernyataan inisialisasi perulangan.
LinePragma	Mendapatkan atau mengatur baris tempat pernyataan kode terjadi. (Diperoleh dari CodeStatement)
StartDirectives	CodeDirectiveCollection Mendapatkan objek yang berisi arahan mulai. (Diperoleh dari CodeStatement)
Statements	Mendapatkan kumpulan pernyataan yang akan dijalankan dalam perulangan.
TestExpression	Mendapatkan atau mengatur ekspresi untuk diuji sebagai kondisi yang melanjutkan perulangan.
UserData	Mendapatkan data yang dapat ditetapkan pengguna untuk objek saat ini. (Diperoleh dari CodeObject)

Metode

Equals(Object)	Menentukan apakah objek yang ditentukan sama dengan objek saat ini. (Diperoleh dari Object)
GetHashCode()	Berfungsi sebagai fungsi hash default. (Diperoleh dari Object)
GetType()	Mendapatkan dari instans Type saat ini. (Diperoleh dari Object)
MemberwiseClone()	Membuat salinan dangkal dari saat ini Object. (Diperoleh dari Object)
ToString()	Mengembalikan string yang mewakili objek saat ini. (Diperoleh dari Object)