CodeGotoStatement Class
.NET Framework 2.0
Represents a goto statement.
Namespace: System.CodeDom
Assembly: System (in system.dll)
Assembly: System (in system.dll)
'Declaration <SerializableAttribute> _ <ComVisibleAttribute(True)> _ <ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)> _ Public Class CodeGotoStatement Inherits CodeStatement 'Usage Dim instance As CodeGotoStatement
/** @attribute SerializableAttribute() */ /** @attribute ComVisibleAttribute(true) */ /** @attribute ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) */ public class CodeGotoStatement extends CodeStatement
SerializableAttribute ComVisibleAttribute(true) ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) public class CodeGotoStatement extends CodeStatement
Not applicable.
CodeGotoStatement can be used to represent a goto statement, which is used in some languages to redirect program flow to a specified label.
The Label property indicates the name of the label at which to continue program execution.
Note: |
|---|
| Not all languages support goto statements. Call the Supports method with the GotoStatements flag to determine whether a code generator supports goto statements. |
The following example code demonstrates use of a CodeGotoStatement and a CodeLabeledStatement to redirect program flow.
' Declares a type to contain the example code. Dim type1 As New CodeTypeDeclaration("Type1") ' Declares an entry point method. Dim entry1 As New CodeEntryPointMethod() type1.Members.Add(entry1) ' Adds a goto statement to continue program flow at the "JumpToLabel" label. Dim goto1 As New CodeGotoStatement("JumpToLabel") entry1.Statements.Add(goto1) ' Invokes Console.WriteLine to print "Test Output", which is skipped by the goto statement. Dim method1 As New CodeMethodInvokeExpression(New CodeTypeReferenceExpression("System.Console"), "WriteLine", New CodePrimitiveExpression("Test Output.")) entry1.Statements.Add(method1) ' Declares a label named "JumpToLabel" associated with a method to output a test string using Console.WriteLine. Dim method2 As New CodeMethodInvokeExpression(New CodeTypeReferenceExpression("System.Console"), "WriteLine", New CodePrimitiveExpression("Output from labeled statement.")) Dim label1 As New CodeLabeledStatement("JumpToLabel", New CodeExpressionStatement(method2)) entry1.Statements.Add(label1) ' A Visual Basic code generator produces the following source code for the preceeding example code: ' Public Class Type1 ' ' Public Shared Sub Main() ' GoTo JumpToLabel ' System.Console.WriteLine("Test Output") ' JumpToLabel: ' System.Console.WriteLine("Output from labeled statement.") ' End Sub ' End Class
// Declares a type to contain the example code.
CodeTypeDeclaration type1 = new CodeTypeDeclaration("Type1");
// Declares an entry point method.
CodeEntryPointMethod entry1 = new CodeEntryPointMethod();
type1.get_Members().Add(entry1);
// Adds a goto statement to continue program flow at the
// "JumpToLabel" label.
CodeGotoStatement goto1 = new CodeGotoStatement("JumpToLabel");
entry1.get_Statements().Add(goto1);
// Invokes Console.WriteLine to print "Test Output", which is
// skipped by the goto statement.
CodeMethodInvokeExpression method1 = new CodeMethodInvokeExpression
(new CodeTypeReferenceExpression("System.Console"),
"WriteLine", new CodePrimitiveExpression[] { new
CodePrimitiveExpression("Test Output.") });
entry1.get_Statements().Add(method1);
// Declares a label named "JumpToLabel" associated with a method to
// output a test string using Console.WriteLine.
CodeMethodInvokeExpression method2 = new
CodeMethodInvokeExpression(new CodeTypeReferenceExpression(
"System.Console"), "WriteLine", new CodePrimitiveExpression[]
{ new CodePrimitiveExpression("Output from labeled statement.") });
CodeLabeledStatement label1 = new CodeLabeledStatement("JumpToLabel",
new CodeExpressionStatement(method2));
entry1.get_Statements().Add(label1);
// A VJ# code generator produces the following source code for the
// preceeding example code:
// public class Type1
// {
// public static void main()
// {
// goto JumpToLabel;
// System.Console.WriteLine("Test Output");
// JumpToLabel:
// System.Console.WriteLine("Output from labeled statement.");
// } //main
// } //Type1
System.Object
System.CodeDom.CodeObject
System.CodeDom.CodeStatement
System.CodeDom.CodeGotoStatement
System.CodeDom.CodeObject
System.CodeDom.CodeStatement
System.CodeDom.CodeGotoStatement
Windows 98, Windows Server 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
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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