StreamingContext コンストラクタ (StreamingContextStates)
アセンブリ: mscorlib (mscorlib.dll 内)


Windows 98, Windows 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
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


StreamingContext コンストラクタ (StreamingContextStates, Object)
アセンブリ: mscorlib (mscorlib.dll 内)

Dim state As StreamingContextStates Dim additional As Object Dim instance As New StreamingContext(state, additional)
public StreamingContext ( StreamingContextStates state, Object additional )
public: StreamingContext ( StreamingContextStates state, Object^ additional )
public StreamingContext ( StreamingContextStates state, Object additional )

state パラメータと additional パラメータを使用して、StreamingContext クラスのインスタンスを作成する例を次に示します。
Imports System Imports System.Text Imports System.Runtime.Serialization.Formatters.Binary Imports System.Runtime.Serialization Imports System.IO Imports System.Security.Permissions Class Program Shared Sub Main(ByVal args() As String) Try SerializeAndDeserialize() Catch exc As System.Exception Console.WriteLine(exc.Message) Finally Console.WriteLine("Press <Enter> to exit....") Console.ReadLine() End Try End Sub Shared Sub SerializeAndDeserialize() Dim myObject As Object = DateTime.Now ' Create a StreamingContext that includes a ' a DateTime. Dim sc As New StreamingContext(StreamingContextStates.CrossProcess, myObject) Dim bf As New BinaryFormatter(Nothing, sc) Dim ms As New MemoryStream(New Byte(2047) {}) bf.Serialize(ms, New [MyClass]()) ms.Seek(0, SeekOrigin.Begin) Dim f As [MyClass] = CType(bf.Deserialize(ms), [MyClass]) Console.WriteLine(vbTab + " MinValue: {0} " + vbLf + vbTab + " MaxValue: {1}", f.MinValue, f.MaxValue) Console.WriteLine("StreamingContext.State: {0}", sc.State) Dim myDateTime As DateTime = CType(sc.Context, DateTime) Console.WriteLine("StreamingContext.Context: {0}", myDateTime.ToLongTimeString()) End Sub End Class <Serializable(), SecurityPermission(SecurityAction.Demand, SerializationFormatter := True)> _ Class [MyClass] Implements ISerializable Private minValue_value As Integer Private maxValue_value As Integer Public Sub New() minValue_value = Integer.MinValue maxValue_value = Integer.MaxValue End Sub Public Property MinValue() As Integer Get Return minValue_value End Get Set minValue_value = value End Set End Property Public Property MaxValue() As Integer Get Return maxValue_value End Get Set maxValue_value = value End Set End Property Sub GetObjectData(ByVal si As SerializationInfo, ByVal context As StreamingContext) Implements ISerializable.GetObjectData si.AddValue("minValue", minValue_value) si.AddValue("maxValue", maxValue_value) End Sub Protected Sub New(ByVal si As SerializationInfo, ByVal context As StreamingContext) minValue_value = Fix(si.GetValue("minValue", GetType(Integer))) maxValue_value = Fix(si.GetValue("maxValue", GetType(Integer))) End Sub End Class
using System; using System.Text; using System.Runtime.Serialization.Formatters.Binary; using System.Runtime.Serialization; using System.IO; using System.Security.Permissions; namespace StreamingContextExample { class Program { static void Main(string[] args) { try { SerializeAndDeserialize(); } catch (System.Exception exc) { Console.WriteLine(exc.Message); } finally { Console.WriteLine("Press <Enter> to exit...."); Console.ReadLine(); } } static void SerializeAndDeserialize() { object myObject = DateTime.Now; // Create a StreamingContext that includes a // a DateTime. StreamingContext sc = new StreamingContext( StreamingContextStates.CrossProcess, myObject); BinaryFormatter bf = new BinaryFormatter(null, sc); MemoryStream ms = new MemoryStream(new byte[2048]); bf.Serialize(ms, new MyClass()); ms.Seek(0, SeekOrigin.Begin); MyClass f = (MyClass)bf.Deserialize(ms); Console.WriteLine("\t MinValue: {0} \n\t MaxValue: {1}", f.MinValue , f.MaxValue); Console.WriteLine("StreamingContext.State: {0}", sc.State); DateTime myDateTime = (DateTime)sc.Context; Console.WriteLine("StreamingContext.Context: {0}", myDateTime.ToLongTimeString()); } } [Serializable] [SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)] class MyClass : ISerializable { private int minValue_value; private int maxValue_value; public MyClass() { minValue_value = int.MinValue; maxValue_value = int.MaxValue; } public int MinValue { get { return minValue_value; } set { minValue_value = value;} } public int MaxValue { get { return maxValue_value; } set { maxValue_value = value; } } void ISerializable.GetObjectData(SerializationInfo si, StreamingContext context) { si.AddValue("minValue", minValue_value); si.AddValue("maxValue", maxValue_value); } protected MyClass(SerializationInfo si, StreamingContext context) { minValue_value = (int)si.GetValue("minValue", typeof(int)); maxValue_value = (int)si.GetValue("maxValue", typeof(int)); } } }

Windows 98, Windows 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
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


StreamingContext コンストラクタ

名前 | 説明 |
---|---|
StreamingContext (StreamingContextStates) | コンテキストの状態を指定して、StreamingContext クラスの新しいインスタンスを初期化します。 |
StreamingContext (StreamingContextStates, Object) | コンテキストの状態と追加情報を指定して、StreamingContext クラスの新しいインスタンスを初期化します。 |

StreamingContext プロパティ
StreamingContext メソッド

名前 | 説明 | |
---|---|---|
![]() | Equals | オーバーロードされます。 オーバーライドされます。 |
![]() | GetHashCode | オーバーライドされます。 このオブジェクトのハッシュ コードを返します。 |
![]() | GetType | 現在のインスタンスの Type を取得します。 ( Object から継承されます。) |
![]() | ReferenceEquals | 指定した複数の Object インスタンスが同一かどうかを判断します。 ( Object から継承されます。) |
![]() | ToString | このインスタンスの完全修飾型名を返します。 ( ValueType から継承されます。) |

StreamingContext メンバ
指定したシリアル化ストリームの転送元と転送先を記述し、呼び出し元によって定義された追加コンテキストを提供します。
StreamingContext データ型で公開されるメンバを以下の表に示します。



名前 | 説明 | |
---|---|---|
![]() | Equals | オーバーロードされます。 オーバーライドされます。 |
![]() | GetHashCode | オーバーライドされます。 このオブジェクトのハッシュ コードを返します。 |
![]() | GetType | 現在のインスタンスの Type を取得します。 (Object から継承されます。) |
![]() | ReferenceEquals | 指定した複数の Object インスタンスが同一かどうかを判断します。 (Object から継承されます。) |
![]() | ToString | このインスタンスの完全修飾型名を返します。 (ValueType から継承されます。) |

StreamingContext 構造体
アセンブリ: mscorlib (mscorlib.dll 内)


フォーマッタが使用するビットの転送元または転送先を示します。サロゲートを持つクラス、または ISerializable を実装するクラスは、ストリーム コンテキストに格納されている情報に基づいて、フィールドおよび値をシリアル化または無視できます。たとえば、State プロパティが System.Runtime.Serialization.StreamingContextStates.CrossProcess に設定されていても、ウィンドウ ハンドルは有効です。

StreamingContext 構造体のコード例を次に示します。
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
// 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; using System.Security.Permissions; [assembly: SecurityPermission( SecurityAction.RequestMinimum, Execution = true)] // 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")] public static extern IntPtr CreateFileMapping(IntPtr hFile, IntPtr pAttributes, UInt32 flProtect, UInt32 dwMaximumSizeHigh, UInt32 dwMaximumSizeLow, String pName); [DllImport("Kernel32")] public static extern IntPtr OpenFileMapping(UInt32 dwDesiredAccess, Boolean bInheritHandle, String name); [DllImport("Kernel32")] public static extern Boolean CloseHandle(IntPtr handle); [DllImport("Kernel32")] public static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject, UInt32 dwDesiredAccess, UInt32 dwFileOffsetHigh, UInt32 dwFileOffsetLow, IntPtr dwNumberOfBytesToMap); [DllImport("Kernel32")] public static extern Boolean UnmapViewOfFile(IntPtr address); [DllImport("Kernel32")] 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")] 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(true); } private void Dispose(Boolean disposing) { Win32.UnmapViewOfFile(m_address); Win32.CloseHandle(m_hFileMap); m_address = IntPtr.Zero; m_hFileMap = IntPtr.Zero; } ~SharedMemory() { Dispose(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; } // The security attribute demands that code that calls // this method have permission to perform serialization. [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)] 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); } } // The security attribute demands that code that calls // this method have permission to perform serialization. [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)] 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)); } }


Windows 98, Windows 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
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


- StreamingContextのページへのリンク