CodeTryCatchFinallyStatement Class
Represents a try block with any number of catch clauses and, optionally, a finally block.
Assembly: System (in System.dll)
CodeTryCatchFinallyStatement can be used to represent a try/ catch block of code.
The TryStatements property contains the statements to execute within a try block. The CatchClauses property contains the catch clauses to handle caught exceptions. The FinallyStatements property contains the statements to execute within a finally block.
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Not all languages support try/catch blocks. Call the Supports method with the GeneratorSupport.TryCatchStatements flag to determine whether a code generator supports try/catch blocks. |
The following example code demonstrates use of a CodeTryCatchFinallyStatement to define a try...catch...finally statement for exception handling.
' Declares a type to contain a try...catch block. Dim type1 As New CodeTypeDeclaration("TryCatchTest") ' Defines a method that throws an exception of type System.ApplicationException. Dim method1 As New CodeMemberMethod() method1.Name = "ThrowApplicationException" method1.Statements.Add(New CodeThrowExceptionStatement( _ New CodeObjectCreateExpression("System.ApplicationException", New CodePrimitiveExpression("Test Application Exception")))) type1.Members.Add(method1) ' Defines a constructor that calls the ThrowApplicationException method from a try block. Dim constructor1 As New CodeConstructor() constructor1.Attributes = MemberAttributes.Public type1.Members.Add(constructor1) ' Defines a try statement that calls the ThrowApplicationException method. Dim try1 As New CodeTryCatchFinallyStatement() try1.TryStatements.Add(New CodeMethodInvokeExpression(New CodeThisReferenceExpression(), "ThrowApplicationException")) constructor1.Statements.Add(try1) ' Defines a catch clause for exceptions of type ApplicationException. Dim catch1 As New CodeCatchClause("ex", New CodeTypeReference("System.ApplicationException")) catch1.Statements.Add(New CodeCommentStatement("Handle any System.ApplicationException here.")) try1.CatchClauses.Add(catch1) ' Defines a catch clause for any remaining unhandled exception types. Dim catch2 As New CodeCatchClause("ex") catch2.Statements.Add(New CodeCommentStatement("Handle any other exception type here.")) try1.CatchClauses.Add(catch2) ' Defines a finally block by adding to the FinallyStatements collection. try1.FinallyStatements.Add(New CodeCommentStatement("Handle any finally block statements.")) ' A Visual Basic code generator produces the following Visual Basic source ' code for the preceeding example code: ' '------------------------------------------------------------------------------ ' ' <auto-generated> ' ' This code was generated by a tool. ' ' Runtime Version:2.0.50727.42 ' ' ' ' Changes to this file may cause incorrect behavior and will be lost if ' ' the code is regenerated. ' ' </auto-generated> ' '------------------------------------------------------------------------------ 'Option Strict Off 'Option Explicit On 'Imports System 'Namespace Samples ' Public Class TryCatchTest ' Public Sub New() ' MyBase.New() ' Try ' Me.ThrowApplicationException() ' Catch ex As System.ApplicationException ' 'Handle any System.ApplicationException here. ' Catch ex As System.Exception ' 'Handle any other exception type here. ' Finally ' 'Handle any finally block statements. ' End Try ' End Sub ' Private Sub ThrowApplicationException() ' Throw New System.ApplicationException("Test Application Exception") ' End Sub ' End Class ' End Namespace
System.CodeDom.CodeObject
System.CodeDom.CodeStatement
System.CodeDom.CodeTryCatchFinallyStatement
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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