CodeTryCatchFinallyStatement Kelas

Definisi

Ruang nama:

System.CodeDom

Rakitan:

System.CodeDom.dll

Sumber:

CodeTryCatchFinallyStatement.cs

try Mewakili blok dengan sejumlah catch klausul dan, secara opsional, sebuah finally blok.

public ref class CodeTryCatchFinallyStatement : System::CodeDom::CodeStatement

public class CodeTryCatchFinallyStatement : System.CodeDom.CodeStatement

type CodeTryCatchFinallyStatement = class
    inherit CodeStatement

Public Class CodeTryCatchFinallyStatement
Inherits CodeStatement

Warisan

Object

CodeObject

CodeStatement

CodeTryCatchFinallyStatement

Contoh

Contoh kode berikut menunjukkan penggunaan untuk CodeTryCatchFinallyStatement menentukan try...catch...finally pernyataan untuk penanganan pengecualian.

// Declares a type to contain a try...catch block.
CodeTypeDeclaration type1 = new CodeTypeDeclaration("TryCatchTest");

// Defines a method that throws an exception of type System.ApplicationException.
CodeMemberMethod method1 = 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.
CodeConstructor constructor1 = new CodeConstructor();
constructor1.Attributes = MemberAttributes.Public;
type1.Members.Add( constructor1 );

// Defines a try statement that calls the ThrowApplicationException method.
CodeTryCatchFinallyStatement try1 = new CodeTryCatchFinallyStatement();
try1.TryStatements.Add( new CodeMethodInvokeExpression( new CodeThisReferenceExpression(), "ThrowApplicationException" ) );
constructor1.Statements.Add( try1 );

// Defines a catch clause for exceptions of type ApplicationException.
CodeCatchClause catch1 = 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.
CodeCatchClause catch2 = 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 C# code generator produces the following source code for the preceeding example code:

//    public class TryCatchTest
//    {
//
//        public TryCatchTest()
//        {
//            try
//            {
//                this.ThrowApplicationException();
//            }
//            catch (System.ApplicationException ex)
//            {
//                // Handle any System.ApplicationException here.
//            }
//            catch (System.Exception ex)
//            {
//                // Handle any other exception type here.
//            }
//          finally {
//                // Handle any finally block statements.
//            }
//        }
//
//        private void ThrowApplicationException()
//        {
//            throw new System.ApplicationException("Test Application Exception");
//        }
//    }

' 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

'            '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

Keterangan

CodeTryCatchFinallyStatement dapat digunakan untuk mewakili try/catch blok kode.

Properti TryStatements berisi pernyataan yang akan dijalankan dalam try blok. Properti CatchClauses berisi catch klausa untuk menangani pengecualian yang tertangkap. Properti FinallyStatements berisi pernyataan yang akan dijalankan dalam finally blok.

Nota

Tidak semua bahasa mendukung try/catch blok. Supports Panggil metode dengan GeneratorSupport.TryCatchStatements bendera untuk menentukan apakah generator kode mendukung try/catch blok.

Konstruktor

Nama	Deskripsi
CodeTryCatchFinallyStatement()	Menginisialisasi instans baru dari kelas CodeTryCatchFinallyStatement.
CodeTryCatchFinallyStatement(CodeStatement[], CodeCatchClause[], CodeStatement[])	Menginisialisasi instans CodeTryCatchFinallyStatement baru kelas menggunakan pernyataan yang ditentukan untuk mencoba, menangkap klausul, dan akhirnya pernyataan.
CodeTryCatchFinallyStatement(CodeStatement[], CodeCatchClause[])	Menginisialisasi instans CodeTryCatchFinallyStatement baru kelas menggunakan pernyataan yang ditentukan untuk mencoba dan menangkap klausa.

Properti

Nama	Deskripsi
CatchClauses	Mendapatkan klausul tangkapan untuk digunakan.
EndDirectives	CodeDirectiveCollection Mendapatkan objek yang berisi arahan akhir. (Diperoleh dari CodeStatement)
FinallyStatements	Mendapatkan pernyataan akhirnya untuk digunakan.
LinePragma	Mendapatkan atau mengatur baris tempat pernyataan kode terjadi. (Diperoleh dari CodeStatement)
StartDirectives	CodeDirectiveCollection Mendapatkan objek yang berisi arahan mulai. (Diperoleh dari CodeStatement)
TryStatements	Mendapatkan pernyataan untuk dicoba.
UserData	Mendapatkan data yang dapat ditetapkan pengguna untuk objek saat ini. (Diperoleh dari CodeObject)