ObjectDisposedException 类
对已释放的对象执行操作时所引发的异常。
**命名空间:**System
**程序集:**mscorlib(在 mscorlib.dll 中)
语法
声明
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public Class ObjectDisposedException
Inherits InvalidOperationException
用法
Dim instance As ObjectDisposedException
[SerializableAttribute]
[ComVisibleAttribute(true)]
public class ObjectDisposedException : InvalidOperationException
[SerializableAttribute]
[ComVisibleAttribute(true)]
public ref class ObjectDisposedException : public InvalidOperationException
/** @attribute SerializableAttribute() */
/** @attribute ComVisibleAttribute(true) */
public class ObjectDisposedException extends InvalidOperationException
SerializableAttribute
ComVisibleAttribute(true)
public class ObjectDisposedException extends InvalidOperationException
示例
下面的示例演示导致引发 ObjectDisposedException 异常的错误。
Imports System
Imports System.IO
Public Class ObjectDisposedExceptionTest
Public Shared Sub Main()
Dim ms As New MemoryStream(16)
ms.Close()
Try
ms.ReadByte()
Catch e As ObjectDisposedException
Console.WriteLine("Caught: {0}", e.Message)
End Try
End Sub 'Main
End Class 'ObjectDisposedExceptionTest
using System;
using System.IO;
public class ObjectDisposedExceptionTest
{
public static void Main()
{
MemoryStream ms = new MemoryStream(16);
ms.Close();
try
{
ms.ReadByte();
}
catch (ObjectDisposedException e)
{
Console.WriteLine("Caught: {0}", e.Message);
}
}
}
using namespace System;
using namespace System::IO;
int main()
{
MemoryStream^ ms = gcnew MemoryStream( 16 );
ms->Close();
try
{
ms->ReadByte();
}
catch ( ObjectDisposedException^ e )
{
Console::WriteLine( "Caught: {0}", e->Message );
}
}
import System.*;
import System.IO.*;
public class ObjectDisposedExceptionTest
{
public static void main(String[] args)
{
MemoryStream ms = new MemoryStream(16);
ms.Close();
try {
ms.ReadByte();
}
catch (ObjectDisposedException e) {
Console.WriteLine("Caught: {0}", e.get_Message());
}
} //main
} //ObjectDisposedExceptionTest
这段代码产生以下输出:
Caught:
Cannot access a closed Stream.
继承层次结构
System.Object
System.Exception
System.SystemException
System.InvalidOperationException
System.ObjectDisposedException
线程安全
此类型的任何公共静态(Visual Basic 中的 Shared)成员都是线程安全的,但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求。
版本信息
.NET Framework
受以下版本支持:2.0、1.1、1.0
.NET Compact Framework
受以下版本支持:2.0、1.0