SerializationException Classe
Définition
Important
Certaines informations portent sur la préversion du produit qui est susceptible d’être en grande partie modifiée avant sa publication. Microsoft exclut toute garantie, expresse ou implicite, concernant les informations fournies ici.
Exception levée quand une erreur se produit pendant la sérialisation ou la désérialisation.
public ref class SerializationException : Exception
public ref class SerializationException : SystemException
public class SerializationException : Exception
public class SerializationException : SystemException
[System.Serializable]
public class SerializationException : SystemException
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public class SerializationException : SystemException
type SerializationException = class
inherit Exception
type SerializationException = class
inherit SystemException
[<System.Serializable>]
type SerializationException = class
inherit SystemException
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type SerializationException = class
inherit SystemException
Public Class SerializationException
Inherits Exception
Public Class SerializationException
Inherits SystemException
- Héritage
- Héritage
- Attributs
Exemples
// Note: You must compile this file using the C# /unsafe switch.
using System;
using System.IO;
using System.Collections;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;
using System.Runtime.InteropServices;
// This class includes several Win32 interop definitions.
internal class Win32
{
public static readonly IntPtr InvalidHandleValue = new IntPtr(-1);
public const UInt32 FILE_MAP_WRITE = 2;
public const UInt32 PAGE_READWRITE = 0x04;
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public static extern IntPtr CreateFileMapping(IntPtr hFile,
IntPtr pAttributes, UInt32 flProtect,
UInt32 dwMaximumSizeHigh, UInt32 dwMaximumSizeLow, String pName);
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public static extern IntPtr OpenFileMapping(UInt32 dwDesiredAccess,
Boolean bInheritHandle, String name);
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public static extern Boolean CloseHandle(IntPtr handle);
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject,
UInt32 dwDesiredAccess,
UInt32 dwFileOffsetHigh, UInt32 dwFileOffsetLow,
IntPtr dwNumberOfBytesToMap);
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public static extern Boolean UnmapViewOfFile(IntPtr address);
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public static extern Boolean DuplicateHandle(IntPtr hSourceProcessHandle,
IntPtr hSourceHandle,
IntPtr hTargetProcessHandle, ref IntPtr lpTargetHandle,
UInt32 dwDesiredAccess, Boolean bInheritHandle, UInt32 dwOptions);
public const UInt32 DUPLICATE_CLOSE_SOURCE = 0x00000001;
public const UInt32 DUPLICATE_SAME_ACCESS = 0x00000002;
[DllImport("Kernel32",CharSet=CharSet.Unicode)]
public static extern IntPtr GetCurrentProcess();
}
// This class wraps memory that can be simultaneously
// shared by multiple AppDomains and Processes.
[Serializable]
public sealed class SharedMemory : ISerializable, IDisposable
{
// The handle and string that identify
// the Windows file-mapping object.
private IntPtr m_hFileMap = IntPtr.Zero;
private String m_name;
// The address of the memory-mapped file-mapping object.
private IntPtr m_address;
public unsafe Byte* Address
{
get { return (Byte*)m_address; }
}
// The constructors.
public SharedMemory(Int32 size) : this(size, null) { }
public SharedMemory(Int32 size, String name)
{
m_hFileMap = Win32.CreateFileMapping(Win32.InvalidHandleValue,
IntPtr.Zero, Win32.PAGE_READWRITE,
0, unchecked((UInt32)size), name);
if (m_hFileMap == IntPtr.Zero)
throw new Exception("Could not create memory-mapped file.");
m_name = name;
m_address = Win32.MapViewOfFile(m_hFileMap, Win32.FILE_MAP_WRITE,
0, 0, IntPtr.Zero);
}
// The cleanup methods.
public void Dispose()
{
GC.SuppressFinalize(this);
Dispose(disposing: true);
}
private void Dispose(Boolean disposing)
{
Win32.UnmapViewOfFile(m_address);
Win32.CloseHandle(m_hFileMap);
m_address = IntPtr.Zero;
m_hFileMap = IntPtr.Zero;
}
~SharedMemory()
{
Dispose(disposing: false);
}
// Private helper methods.
private static Boolean AllFlagsSet(Int32 flags, Int32 flagsToTest)
{
return (flags & flagsToTest) == flagsToTest;
}
private static Boolean AnyFlagsSet(Int32 flags, Int32 flagsToTest)
{
return (flags & flagsToTest) != 0;
}
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
{
// The context's State member indicates
// where the object will be deserialized.
// A SharedMemory object cannot be serialized
// to any of the following destinations.
const StreamingContextStates InvalidDestinations =
StreamingContextStates.CrossMachine |
StreamingContextStates.File |
StreamingContextStates.Other |
StreamingContextStates.Persistence |
StreamingContextStates.Remoting;
if (AnyFlagsSet((Int32)context.State, (Int32)InvalidDestinations))
throw new SerializationException("The SharedMemory object " +
"cannot be serialized to any of the following streaming contexts: " +
InvalidDestinations);
const StreamingContextStates DeserializableByHandle =
StreamingContextStates.Clone |
// The same process.
StreamingContextStates.CrossAppDomain;
if (AnyFlagsSet((Int32)context.State, (Int32)DeserializableByHandle))
info.AddValue("hFileMap", m_hFileMap);
const StreamingContextStates DeserializableByName =
// The same computer.
StreamingContextStates.CrossProcess;
if (AnyFlagsSet((Int32)context.State, (Int32)DeserializableByName))
{
if (m_name == null)
throw new SerializationException("The SharedMemory object " +
"cannot be serialized CrossProcess because it was not constructed " +
"with a String name.");
info.AddValue("name", m_name);
}
}
private SharedMemory(SerializationInfo info, StreamingContext context)
{
// The context's State member indicates
// where the object was serialized from.
const StreamingContextStates InvalidSources =
StreamingContextStates.CrossMachine |
StreamingContextStates.File |
StreamingContextStates.Other |
StreamingContextStates.Persistence |
StreamingContextStates.Remoting;
if (AnyFlagsSet((Int32)context.State, (Int32)InvalidSources))
throw new SerializationException("The SharedMemory object " +
"cannot be deserialized from any of the following stream contexts: " +
InvalidSources);
const StreamingContextStates SerializedByHandle =
StreamingContextStates.Clone |
// The same process.
StreamingContextStates.CrossAppDomain;
if (AnyFlagsSet((Int32)context.State, (Int32)SerializedByHandle))
{
try
{
Win32.DuplicateHandle(Win32.GetCurrentProcess(),
(IntPtr)info.GetValue("hFileMap", typeof(IntPtr)),
Win32.GetCurrentProcess(), ref m_hFileMap, 0, false,
Win32.DUPLICATE_SAME_ACCESS);
}
catch (SerializationException)
{
throw new SerializationException("A SharedMemory was not serialized " +
"using any of the following streaming contexts: " +
SerializedByHandle);
}
}
const StreamingContextStates SerializedByName =
// The same computer.
StreamingContextStates.CrossProcess;
if (AnyFlagsSet((Int32)context.State, (Int32)SerializedByName))
{
try
{
m_name = info.GetString("name");
}
catch (SerializationException)
{
throw new SerializationException("A SharedMemory object was not " +
"serialized using any of the following streaming contexts: " +
SerializedByName);
}
m_hFileMap = Win32.OpenFileMapping(Win32.FILE_MAP_WRITE, false, m_name);
}
if (m_hFileMap != IntPtr.Zero)
{
m_address = Win32.MapViewOfFile(m_hFileMap, Win32.FILE_MAP_WRITE,
0, 0, IntPtr.Zero);
}
else
{
throw new SerializationException("A SharedMemory object could not " +
"be deserialized.");
}
}
}
class App
{
[STAThread]
static void Main(string[] args)
{
Serialize();
Console.WriteLine();
Deserialize();
}
unsafe static void Serialize()
{
// Create a hashtable of values that will eventually be serialized.
SharedMemory sm = new SharedMemory(1024, "JeffMemory");
for (Int32 x = 0; x < 100; x++)
*(sm.Address + x) = (Byte)x;
Byte[] b = new Byte[10];
for (Int32 x = 0; x < b.Length; x++) b[x] = *(sm.Address + x);
Console.WriteLine(BitConverter.ToString(b));
// To serialize the SharedMemory object,
// you must first open a stream for writing.
// Use a file stream here.
FileStream fs = new FileStream("DataFile.dat", FileMode.Create);
// Construct a BinaryFormatter and tell it where
// the objects will be serialized to.
BinaryFormatter formatter = new BinaryFormatter(null,
new StreamingContext(StreamingContextStates.CrossAppDomain));
try
{
formatter.Serialize(fs, sm);
}
catch (SerializationException e)
{
Console.WriteLine("Failed to serialize. Reason: " + e.Message);
throw;
}
finally
{
fs.Close();
}
}
unsafe static void Deserialize()
{
// Declare a SharedMemory reference.
SharedMemory sm = null;
// Open the file containing the data that you want to deserialize.
FileStream fs = new FileStream("DataFile.dat", FileMode.Open);
try
{
BinaryFormatter formatter = new BinaryFormatter(null,
new StreamingContext(StreamingContextStates.CrossAppDomain));
// Deserialize the SharedMemory object from the file and
// assign the reference to the local variable.
sm = (SharedMemory)formatter.Deserialize(fs);
}
catch (SerializationException e)
{
Console.WriteLine("Failed to deserialize. Reason: " + e.Message);
throw;
}
finally
{
fs.Close();
}
// To prove that the SharedMemory object deserialized correctly,
// display some of its bytes to the console.
Byte[] b = new Byte[10];
for (Int32 x = 0; x < b.Length; x++) b[x] = *(sm.Address + x);
Console.WriteLine(BitConverter.ToString(b));
}
}
Imports System.IO
Imports System.Collections
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Runtime.Serialization
Imports System.Runtime.InteropServices
Imports System.Security.Permissions
<Assembly: SecurityPermission( _
SecurityAction.RequestMinimum, Execution:=True)>
' This class includes several Win32 interop definitions.
Friend Class Win32
Public Shared ReadOnly InvalidHandleValue As New IntPtr(-1)
Public Const FILE_MAP_WRITE As Int32 = 2
Public Const PAGE_READWRITE As Int32 = &H4
<DllImport("Kernel32", CharSet:=CharSet.Unicode)> _
Public Shared Function CreateFileMapping(ByVal hFile As IntPtr, _
ByVal pAttributes As IntPtr, _
ByVal flProtect As Int32, _
ByVal dwMaximumSizeHigh As Int32, _
ByVal dwMaximumSizeLow As Int32, _
ByVal pName As String) As IntPtr
End Function
<DllImport("Kernel32", CharSet:=CharSet.Unicode)> _
Public Shared Function OpenFileMapping(ByVal dwDesiredAccess As Int32, _
ByVal bInheritHandle As Boolean, _
ByVal name As String) As IntPtr
End Function
<DllImport("Kernel32", CharSet:=CharSet.Unicode)> _
Public Shared Function CloseHandle(ByVal handle As IntPtr) As Boolean
End Function
<DllImport("Kernel32", CharSet:=CharSet.Unicode)> _
Public Shared Function MapViewOfFile(ByVal hFileMappingObject As IntPtr, _
ByVal dwDesiredAccess As Int32, _
ByVal dwFileOffsetHigh As Int32, _
ByVal dwFileOffsetLow As Int32, _
ByVal dwNumberOfBytesToMap As IntPtr) _
As IntPtr
End Function
<DllImport("Kernel32", CharSet:=CharSet.Unicode)> _
Public Shared Function UnmapViewOfFile(ByVal address As IntPtr) As Boolean
End Function
<DllImport("Kernel32", CharSet:=CharSet.Unicode)> _
Public Shared Function DuplicateHandle(ByVal hSourceProcessHandle As IntPtr, _
ByVal hSourceHandle As IntPtr, _
ByVal hTargetProcessHandle As IntPtr, _
ByRef lpTargetHandle As IntPtr, _
ByVal dwDesiredAccess As Int32, _
ByVal bInheritHandle As Boolean, _
ByVal dwOptions As Int32) As Boolean
End Function
Public Const DUPLICATE_CLOSE_SOURCE As Int32 = &H1
Public Const DUPLICATE_SAME_ACCESS As Int32 = &H2
<DllImport("Kernel32", CharSet:=CharSet.Unicode)> Public Shared Function GetCurrentProcess() As IntPtr
End Function
End Class
' This class wraps memory that can be simultaneously
' shared by multiple AppDomains and Processes.
<Serializable()> Public NotInheritable Class SharedMemory
Implements ISerializable
Implements IDisposable
' The handle and string that identify
' the Windows file-mapping object.
Private m_hFileMap As IntPtr = IntPtr.Zero
Private m_name As String
' The address of the memory-mapped file-mapping object.
Private m_address As IntPtr
<SecurityPermissionAttribute(SecurityAction.LinkDemand, _
Flags:=SecurityPermissionFlag.UnmanagedCode)> _
Public Function GetByte(ByVal offset As Int32) As Byte
Dim b(0) As Byte
Marshal.Copy(New IntPtr(m_address.ToInt64() + offset), b, 0, 1)
Return b(0)
End Function
<SecurityPermissionAttribute(SecurityAction.LinkDemand, _
Flags:=SecurityPermissionFlag.UnmanagedCode)> _
Public Sub SetByte(ByVal offset As Int32, ByVal value As Byte)
Dim b(0) As Byte
b(0) = value
Marshal.Copy(b, 0, New IntPtr(m_address.ToInt64() + offset), 1)
End Sub
' The constructors.
Public Sub New(ByVal size As Int32)
Me.New(size, Nothing)
End Sub
Public Sub New(ByVal size As Int32, ByVal name As String)
m_hFileMap = Win32.CreateFileMapping(Win32.InvalidHandleValue, _
IntPtr.Zero, Win32.PAGE_READWRITE, 0, size, name)
If (m_hFileMap.Equals(IntPtr.Zero)) Then _
Throw New Exception("Could not create memory-mapped file.")
m_name = name
m_address = Win32.MapViewOfFile(m_hFileMap, _
Win32.FILE_MAP_WRITE, 0, 0, IntPtr.Zero)
End Sub
' The cleanup methods.
Public Sub Dispose() Implements IDisposable.Dispose
GC.SuppressFinalize(Me)
Dispose(disposing:=True)
End Sub
Private Sub Dispose(ByVal disposing As Boolean)
Win32.UnmapViewOfFile(m_address)
Win32.CloseHandle(m_hFileMap)
m_address = IntPtr.Zero
m_hFileMap = IntPtr.Zero
End Sub
Protected Overrides Sub Finalize()
Dispose(disposing:=False)
End Sub
' Private helper methods.
Private Shared Function AllFlagsSet(ByVal flags As Int32, _
ByVal flagsToTest As Int32) As Boolean
Return (flags And flagsToTest) = flagsToTest
End Function
Private Shared Function AnyFlagsSet(ByVal flags As Int32, _
ByVal flagsToTest As Int32) As Boolean
Return (flags And flagsToTest) <> 0
End Function
' The security attribute demands that code that calls
' this method have permission to perform serialization.
<SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter:=True)> _
Sub GetObjectData(ByVal info As SerializationInfo, _
ByVal context As StreamingContext) _
Implements ISerializable.GetObjectData
' The context's State member indicates where the object will be deserialized.
' A SharedMemory object cannot be serialized
' to any of the following destinations.
Const InvalidDestinations As StreamingContextStates = _
StreamingContextStates.CrossMachine Or _
StreamingContextStates.File Or _
StreamingContextStates.Other Or _
StreamingContextStates.Persistence Or _
StreamingContextStates.Remoting
If AnyFlagsSet(CType(context.State, Int32), _
CType(InvalidDestinations, Int32)) Then
Throw New SerializationException("The SharedMemory object " & _
"cannot be serialized to any of the following streaming contexts: " _
& InvalidDestinations)
End If
Const DeserializableByHandle As StreamingContextStates = _
StreamingContextStates.Clone Or _
StreamingContextStates.CrossAppDomain
If AnyFlagsSet(CType(context.State, Int32), _
CType(DeserializableByHandle, Int32)) Then
info.AddValue("hFileMap", m_hFileMap)
End If
Const DeserializableByName As StreamingContextStates = _
StreamingContextStates.CrossProcess ' The same computer.
If AnyFlagsSet(CType(context.State, Int32), CType(DeserializableByName, _
Int32)) Then
If m_name = Nothing Then
Throw New SerializationException("The SharedMemory object " & _
"cannot be serialized CrossProcess because it was not constructed " & _
"with a String name.")
End If
info.AddValue("name", m_name)
End If
End Sub
Private Sub New(ByVal info As SerializationInfo, ByVal context As StreamingContext)
' The context's State member indicates where the object was serialized from.
Const InvalidSources As StreamingContextStates = _
StreamingContextStates.CrossMachine Or _
StreamingContextStates.File Or _
StreamingContextStates.Other Or _
StreamingContextStates.Persistence Or _
StreamingContextStates.Remoting
If AnyFlagsSet(CType(context.State, Int32), CType(InvalidSources, Int32)) Then
Throw New SerializationException("The SharedMemory object " & _
"cannot be deserialized from any of the following stream contexts: " & _
InvalidSources)
End If
Const SerializedByHandle As StreamingContextStates = _
StreamingContextStates.Clone Or _
StreamingContextStates.CrossAppDomain ' The same process.
If AnyFlagsSet(CType(context.State, Int32), _
CType(SerializedByHandle, Int32)) Then
Try
Win32.DuplicateHandle(Win32.GetCurrentProcess(), _
CType(info.GetValue("hFileMap", GetType(IntPtr)), IntPtr), _
Win32.GetCurrentProcess(), m_hFileMap, 0, False, _
Win32.DUPLICATE_SAME_ACCESS)
Catch e As SerializationException
Throw New SerializationException("A SharedMemory was not " & _
"serialized using any of the following streaming contexts: " & _
SerializedByHandle)
End Try
End If
Const SerializedByName As StreamingContextStates = _
StreamingContextStates.CrossProcess ' The same computer.
If AnyFlagsSet(CType(context.State, Int32), _
CType(SerializedByName, Int32)) Then
Try
m_name = info.GetString("name")
Catch e As SerializationException
Throw New SerializationException("A SharedMemory object " & _
"was not serialized using any of the following streaming contexts: " & _
SerializedByName)
End Try
m_hFileMap = Win32.OpenFileMapping(Win32.FILE_MAP_WRITE, False, m_name)
End If
If Not m_hFileMap.Equals(IntPtr.Zero) Then
m_address = Win32.MapViewOfFile(m_hFileMap, _
Win32.FILE_MAP_WRITE, 0, 0, IntPtr.Zero)
Else
Throw New SerializationException("A SharedMemory object " & _
"could not be deserialized.")
End If
End Sub
End Class
Class App
<STAThread()> Shared Sub Main()
Serialize()
Console.WriteLine()
Deserialize()
End Sub
Shared Sub Serialize()
' Create a hashtable of values that will eventually be serialized.
Dim sm As New SharedMemory(1024, "MyMemory")
Dim x As Int32
For x = 0 To 99
sm.SetByte(x, x)
Next
Dim b(9) As Byte
For x = 0 To b.Length - 1
b(x) = sm.GetByte(x)
Next
Console.WriteLine(BitConverter.ToString(b))
' To serialize the hashtable (and its key/value pairs), you must first
' open a stream for writing. Use a file stream here.
Dim fs As New FileStream("DataFile.dat", FileMode.Create)
' Construct a BinaryFormatter telling it where
' the objects will be serialized to.
Dim formatter As New BinaryFormatter(Nothing, _
New StreamingContext(StreamingContextStates.CrossAppDomain))
Try
formatter.Serialize(fs, sm)
Catch e As SerializationException
Console.WriteLine("Failed to serialize. Reason: " + e.Message)
Throw
Finally
fs.Close()
End Try
End Sub
Shared Sub Deserialize()
' Declare the hashtable reference.
Dim sm As SharedMemory = Nothing
' Open the file containing the data that you want to deserialize.
Dim fs As New FileStream("DataFile.dat", FileMode.Open)
Try
Dim Formatter As New BinaryFormatter(Nothing, _
New StreamingContext(StreamingContextStates.CrossAppDomain))
' Deserialize the SharedMemory object from the file and
' assign the reference to the local variable.
sm = DirectCast(Formatter.Deserialize(fs), SharedMemory)
Catch e As SerializationException
Console.WriteLine("Failed to deserialize. Reason: " & e.Message)
Finally
fs.Close()
End Try
' To prove that the SharedMemory object deserialized correctly,
' display some of its bytes to the console.
Dim b(9) As Byte
Dim x As Int32
For x = 0 To b.Length - 1
b(x) = sm.GetByte(x)
Next
Console.WriteLine(BitConverter.ToString(b))
End Sub
End Class
Remarques
SerializationException utilise le HRESULT
COR_E_SERIALIZATION avec la valeur 0x8013150C.
SerializationException utilise l’implémentation par défaut Equals , qui prend en charge l’égalité des références.
Pour obtenir la liste des valeurs initiales des propriétés d’une instance de SerializationException, consultez le SerializationException constructeurs.
Constructeurs
SerializationException() |
Initialise une nouvelle instance de la classe SerializationException avec des propriétés par défaut. |
SerializationException(SerializationInfo, StreamingContext) |
Initialise une nouvelle instance de la classe SerializationException à partir de données sérialisées. |
SerializationException(String) |
Initialise une nouvelle instance de la classe SerializationException avec le message spécifié. |
SerializationException(String, Exception) |
Initialise une nouvelle instance de la classe SerializationException avec un message d'erreur spécifié et une référence à l'exception interne ayant provoqué cette exception. |
Propriétés
Data |
Obtient une collection de paires clé/valeur qui fournissent des informations définies par l'utilisateur supplémentaires sur l'exception. (Hérité de Exception) |
HelpLink |
Obtient ou définit un lien vers le fichier d'aide associé à cette exception. (Hérité de Exception) |
HResult |
Obtient ou définit HRESULT, valeur numérique codée qui est assignée à une exception spécifique. (Hérité de Exception) |
InnerException |
Obtient l'instance Exception qui a provoqué l'exception actuelle. (Hérité de Exception) |
Message |
Obtient un message qui décrit l'exception active. (Hérité de Exception) |
Source |
Obtient ou définit le nom de l'application ou de l'objet qui est à l'origine de l'erreur. (Hérité de Exception) |
StackTrace |
Obtient une représentation sous forme de chaîne des frames immédiats sur la pile des appels. (Hérité de Exception) |
TargetSite |
Obtient la méthode qui lève l'exception actuelle. (Hérité de Exception) |
Méthodes
Equals(Object) |
Détermine si l'objet spécifié est égal à l'objet actuel. (Hérité de Object) |
GetBaseException() |
En cas de substitution dans une classe dérivée, retourne la Exception qui est à l'origine d'une ou de plusieurs exceptions ultérieures. (Hérité de Exception) |
GetHashCode() |
Fait office de fonction de hachage par défaut. (Hérité de Object) |
GetObjectData(SerializationInfo, StreamingContext) |
En cas de substitution dans une classe dérivée, définit SerializationInfo avec des informations sur l'exception. (Hérité de Exception) |
GetType() |
Obtient le type au moment de l'exécution de l'instance actuelle. (Hérité de Exception) |
MemberwiseClone() |
Crée une copie superficielle du Object actuel. (Hérité de Object) |
ToString() |
Crée et retourne une chaîne représentant l'exception actuelle. (Hérité de Exception) |
Événements
SerializeObjectState |
Obsolète.
Se produit quand une exception est sérialisée pour créer un objet d'état d'exception qui contient des données sérialisées concernant l'exception. (Hérité de Exception) |