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CodeIterationStatement 類別

定義

表示 for 陳述式或陳述式區塊的迴圈,使用測試運算式做為繼續迴圈的條件。

public ref class CodeIterationStatement : System::CodeDom::CodeStatement
public 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
type CodeIterationStatement = class
    inherit 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
繼承
CodeIterationStatement
屬性

範例

此範例示範如何使用 CodeIterationStatement 來表示 for 迴圈。

// 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)

備註

CodeIterationStatement可以表示for迴圈或while迴圈。

屬性 InitStatement 會指定要在第一個循環反覆專案之前執行的語句。 屬性 TestExpression 會指定迴圈接續表達式,其必須在每個迴圈反覆項目的結尾評估 true 為 ,才能開始進行另一個反覆專案。 屬性 IncrementStatement 會指定要在每個迴圈反覆項目結尾執行的語句。 屬性 Statements 會指定要在迴圈內執行的語句集合。

建構函式

CodeIterationStatement()

初始化 CodeIterationStatement 類別的新執行個體。

CodeIterationStatement(CodeStatement, CodeExpression, CodeStatement, CodeStatement[])

使用指定的參數初始化 CodeIterationStatement 類別的新執行個體。

屬性

EndDirectives

取得包含結尾指示詞的 CodeDirectiveCollection 物件。

(繼承來源 CodeStatement)
IncrementStatement

取得或設定在每次迴圈循環之後,所呼叫的陳述式。

InitStatement

取得或設定迴圈初始化陳述式。

LinePragma

取得或設定程式碼陳述式發生所在的行。

(繼承來源 CodeStatement)
StartDirectives

取得包含開頭指示詞的 CodeDirectiveCollection 物件。

(繼承來源 CodeStatement)
Statements

取得在迴圈中要執行的陳述式集合。

TestExpression

取得或設定做為繼續迴圈之條件測試的運算式。

UserData

取得目前物件的使用者可定義資料。

(繼承來源 CodeObject)

方法

Equals(Object)

判斷指定的物件是否等於目前的物件。

(繼承來源 Object)
GetHashCode()

做為預設雜湊函式。

(繼承來源 Object)
GetType()

取得目前執行個體的 Type

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。

(繼承來源 Object)
ToString()

傳回代表目前物件的字串。

(繼承來源 Object)

適用於