CodeCatchClause Class
Represents a catch exception block of a try/catch statement.
Assembly: System (in System.dll)
CodeCatchClause can be used to represent a catch exception block of a try/catch statement.
The CatchExceptionType property specifies the type of exception to catch. The LocalName property specifies a name for the variable representing the exception that has been caught. The Statements collection property contains the statements for the catch block.
The following example code demonstrates using CodeCatchClause objects to define exception handling clauses of a try...catch block.
' 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
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.