CodeLabeledStatement Class
Represents a labeled statement or a stand-alone label.
Assembly: System (in System.dll)
CodeLabeledStatement represents a label and optionally, an associated statement. A label can be used to indicate the target of a CodeGotoStatement.
The Statement property is optional. To create only a label, leave the Statement property uninitialized.
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Not all languages support goto statements and labels, so you should test wheter a code generator supports goto statements and labels by calling the Supports method with the GotoStatements flag. |
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
System.CodeDom.CodeObject
System.CodeDom.CodeStatement
System.CodeDom.CodeLabeledStatement
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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