SerializationException Class
.NET Framework 3.0
The exception thrown when an error occurs during serialization or deserialization.
Namespace: System.Runtime.Serialization
Assembly: mscorlib (in mscorlib.dll)
Assembly: mscorlib (in mscorlib.dll)
'Declaration <SerializableAttribute> _ <ComVisibleAttribute(True)> _ Public Class SerializationException Inherits SystemException 'Usage Dim instance As SerializationException
/** @attribute SerializableAttribute() */ /** @attribute ComVisibleAttribute(true) */ public class SerializationException extends SystemException
SerializableAttribute ComVisibleAttribute(true) public class SerializationException extends SystemException
Not applicable.
SerializationException uses the HRESULT COR_E_SERIALIZATION with the value 0x8013150C.
SerializationException uses the default Equals implementation, which supports reference equality.
For a list of initial property values for an instance of SerializationException, see the SerializationException constructors.
Imports System 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")> _ 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")> _ Public Shared Function OpenFileMapping(ByVal dwDesiredAccess As Int32, _ ByVal bInheritHandle As Boolean, _ ByVal name As String) As IntPtr End Function <DllImport("Kernel32")> _ Public Shared Function CloseHandle(ByVal handle As IntPtr) As Boolean End Function <DllImport("Kernel32")> _ 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")> _ Public Shared Function UnmapViewOfFile(ByVal address As IntPtr) As Boolean End Function <DllImport("Kernel32")> _ 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")> 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(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(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
System.Object
System.Exception
System.SystemException
System.Runtime.Serialization.SerializationException
System.Exception
System.SystemException
System.Runtime.Serialization.SerializationException
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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