CodeTryCatchFinallyStatement 类
定义
重要
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表示一个 try 块，具有任意数量的 catch 子句和一个可选的 finally 块。
public ref class CodeTryCatchFinallyStatement : System::CodeDom::CodeStatementpublic class CodeTryCatchFinallyStatement : System.CodeDom.CodeStatement[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class CodeTryCatchFinallyStatement : System.CodeDom.CodeStatementtype CodeTryCatchFinallyStatement = class
inherit CodeStatement[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type CodeTryCatchFinallyStatement = class
inherit CodeStatementPublic Class CodeTryCatchFinallyStatement
Inherits CodeStatement- 继承
- 属性
示例
以下示例代码演示如何使用 CodeTryCatchFinallyStatement 定义 try...catch...finally 异常处理的语句。
// Declares a type to contain a try...catch block.
CodeTypeDeclaration^ type1 = gcnew CodeTypeDeclaration( "TryCatchTest" );
// Defines a method that throws an exception of type System.ApplicationException.
CodeMemberMethod^ method1 = gcnew CodeMemberMethod;
method1->Name = "ThrowApplicationException";
array<CodePrimitiveExpression^>^temp = {gcnew CodePrimitiveExpression( "Test Application Exception" )};
method1->Statements->Add( gcnew CodeThrowExceptionStatement( gcnew CodeObjectCreateExpression( "System.ApplicationException",temp ) ) );
type1->Members->Add( method1 );
// Defines a constructor that calls the ThrowApplicationException method from a try block.
CodeConstructor^ constructor1 = gcnew CodeConstructor;
constructor1->Attributes = MemberAttributes::Public;
type1->Members->Add( constructor1 );
// Defines a try statement that calls the ThrowApplicationException method.
CodeTryCatchFinallyStatement^ try1 = gcnew CodeTryCatchFinallyStatement;
try1->TryStatements->Add( gcnew CodeMethodInvokeExpression( gcnew CodeThisReferenceExpression,"ThrowApplicationException", nullptr ) );
constructor1->Statements->Add( try1 );
// Defines a catch clause for exceptions of type ApplicationException.
CodeCatchClause^ catch1 = gcnew CodeCatchClause( "ex",gcnew CodeTypeReference( "System.ApplicationException" ) );
catch1->Statements->Add( gcnew CodeCommentStatement( "Handle any System.ApplicationException here." ) );
try1->CatchClauses->Add( catch1 );
// Defines a catch clause for any remaining unhandled exception types.
CodeCatchClause^ catch2 = gcnew CodeCatchClause( "ex" );
catch2->Statements->Add( gcnew CodeCommentStatement( "Handle any other exception type here." ) );
try1->CatchClauses->Add( catch2 );
// Defines a finally block by adding to the FinallyStatements collection.
try1->FinallyStatements->Add( gcnew 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.
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
注解
CodeTryCatchFinallyStatement 可用于表示 try/catch 代码块。
属性 TryStatements 包含要在块中 try 执行的语句。 属性 CatchClauses 包含 catch 用于处理捕获的异常的 子句。 属性 FinallyStatements 包含要在块中 finally 执行的语句。
注意
并非所有语言都支持 try/catch 块。 Supports使用 GeneratorSupport.TryCatchStatements 标志调用 方法以确定代码生成器是否支持try/catch块。
构造函数
| CodeTryCatchFinallyStatement() |
初始化 CodeTryCatchFinallyStatement 类的新实例。 |
| CodeTryCatchFinallyStatement(CodeStatement[], CodeCatchClause[]) |
使用指定的 try 子句和 catch 子句的语句初始化 CodeTryCatchFinallyStatement 类的新实例。 |
| CodeTryCatchFinallyStatement(CodeStatement[], CodeCatchClause[], CodeStatement[]) |
使用指定的 try 子句和 catch 子句的语句以及 finally 语句初始化 CodeTryCatchFinallyStatement 类的新实例。 |
属性
| CatchClauses |
获取要使用的 catch 子句。 |
| EndDirectives |
获取包含结束指令的 CodeDirectiveCollection 对象。 (继承自 CodeStatement) |
| FinallyStatements |
获取要使用的 finally 语句。 |
| LinePragma |
获取或设置代码语句所在的行。 (继承自 CodeStatement) |
| StartDirectives |
获取包含开始指令的 CodeDirectiveCollection 对象。 (继承自 CodeStatement) |
| TryStatements |
获取要尝试的语句。 |
| UserData |
获取当前对象的用户可定义数据。 (继承自 CodeObject) |
方法
| Equals(Object) |
确定指定对象是否等于当前对象。 (继承自 Object) |
| GetHashCode() |
作为默认哈希函数。 (继承自 Object) |
| GetType() |
获取当前实例的 Type。 (继承自 Object) |
| MemberwiseClone() |
创建当前 Object 的浅表副本。 (继承自 Object) |
| ToString() |
返回表示当前对象的字符串。 (继承自 Object) |
适用于
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