.NET Framework クラス ライブラリ リファレンス

CodeIterationStatement クラス

for ステートメント、またはループの続行条件としてテスト式を使用するステートメントのブロックを反復処理するループを表します。

名前空間: System.CodeDom
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

<SerializableAttribute> _
<ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)> _
<ComVisibleAttribute(True)> _
Public Class CodeIterationStatement
    Inherits CodeStatement

Visual Basic (使用法)

Dim instance As CodeIterationStatement

C#

[SerializableAttribute] 
[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)] 
[ComVisibleAttribute(true)] 
public class CodeIterationStatement : CodeStatement

C++

[SerializableAttribute] 
[ClassInterfaceAttribute(ClassInterfaceType::AutoDispatch)] 
[ComVisibleAttribute(true)] 
public ref class CodeIterationStatement : public
 CodeStatement

J#

/** @attribute SerializableAttribute() */ 
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) */ 
/** @attribute ComVisibleAttribute(true) */ 
public class CodeIterationStatement extends
 CodeStatement

JScript

SerializableAttribute 
ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) 
ComVisibleAttribute(true) 
public class CodeIterationStatement extends
 CodeStatement

解説

CodeIterationStatement では、for ループか while ループを表すことができます。

InitStatement プロパティは、ループの最初の反復の前に実行するステートメントを指定します。TestExpression プロパティは、ループの継続条件式を指定します。次の反復を開始するためには、この式が各ループ反復の最後で true と評価される必要があります。IncrementStatement プロパティは、各ループ反復の最後に実行するステートメントを指定します。Statements プロパティは、ループ内で実行するステートメントのコレクションを指定します。

使用例

CodeIterationStatement を使用して、for ループを表す例を次に示します。

Visual Basic

 ' 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)

C#

// 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());

C++

// 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());

J#

// Declares and initializes an integer variable named testInt.
CodeVariableDeclarationStatement testInt = new 
    CodeVariableDeclarationStatement(int.class.ToType(),
 
    "testInt", new CodePrimitiveExpression((Int32)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((Int32)1))
,
    // testExpression parameter to test for continuation condition.
    new CodeBinaryOperatorExpression(new 
    CodeVariableReferenceExpression("testInt"), 
    CodeBinaryOperatorType.LessThan, new CodePrimitiveExpression(
    (Int32)10)),
    // incrementStatement parameter indicates statement to execute after
    // each iteration.
    new CodeAssignStatement(new 
    CodeVariableReferenceExpression("testInt"), new
 
    CodeBinaryOperatorExpression(new 
    CodeVariableReferenceExpression("testInt"), 
    CodeBinaryOperatorType.Add, new CodePrimitiveExpression((Int32)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 CodeExpression [] { new CodeMethodInvokeExpression(new
 
    CodeVariableReferenceExpression("testInt"), "ToString", 
    new CodeExpression[] {}) })) });
    // A VJ# 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(System.Convert.ToString(testInt));

継承階層

System.Object
   System.CodeDom.CodeObject
     System.CodeDom.CodeStatement
      System.CodeDom.CodeIterationStatement

スレッド セーフ

この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバの場合は、スレッド セーフであるとは限りません。

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
CodeIterationStatement メンバ
System.CodeDom 名前空間