SerializationBinder.BindToType メソッド
派生クラスでオーバーライドされると、シリアル化されたオブジェクトの型への連結を制御します。 名前空間: System.Runtime.Serialization
アセンブリ: mscorlib (mscorlib.dll 内)
構文
パラメータ
戻り値
フォーマッタが新しいインスタンスを作成する対象のオブジェクトの型。 解説
使用例
プラットフォーム
バージョン情報
参照
アセンブリ: mscorlib (mscorlib.dll 内)
構文Public MustOverride Function BindToType ( _ assemblyName As String, _ typeName As String _ ) As Type
Dim instance As SerializationBinder Dim assemblyName As String Dim typeName As String Dim returnValue As Type returnValue = instance.BindToType(assemblyName, typeName)
戻り値
フォーマッタが新しいインスタンスを作成する対象のオブジェクトの型。
解説使用例Imports System Imports System.IO Imports System.Runtime.Serialization Imports System.Runtime.Serialization.Formatters.Binary Imports System.Reflection Imports System.Security.Permissions Class App <STAThread()> Shared Sub Main() Serialize() Deserialize() End Sub Shared Sub Serialize() ' To serialize the objects, you must first open a stream for writing. ' Use a file stream here. Dim fs As New FileStream("DataFile.dat", FileMode.Create) Try ' Construct a BinaryFormatter and use it ' to serialize the data to the stream. Dim formatter As New BinaryFormatter ' Construct a Version1Type object and serialize it. Dim obj As New Version1Type obj.x = 123 formatter.Serialize(fs, obj) 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 Version2Type reference. Dim obj As Version2Type = Nothing ' Open the file containing the data that you want to deserialize. Dim fs As New FileStream("DataFile.dat", FileMode.Open) Try ' Construct a BinaryFormatter and use it ' to deserialize the data from the stream. Dim formatter As New BinaryFormatter ' Construct an instance of the ' Version1ToVersion2TypeSerialiationBinder type. ' This Binder type can deserialize a Version1Type ' object to a Version2Type object. formatter.Binder = New Version1ToVersion2DeserializationBinder obj = DirectCast(formatter.Deserialize(fs), Version2Type) Catch e As SerializationException Console.WriteLine("Failed to deserialize. Reason: " & e.Message) Throw Finally fs.Close() End Try ' To prove that a Version2Type object was deserialized, ' display the object's type and fields to the console. Console.WriteLine("Type of object deserialized: {0}", obj.GetType()) Console.WriteLine("x = {0}, name = {1}", obj.x, obj.name) End Sub End Class <Serializable()> Class Version1Type Public x As Int32 End Class <Serializable()> Class Version2Type Implements ISerializable Public x As Int32 Public name As String ' The security attribute demands that code that calls ' this method have permission to perform serialization. <SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter:=True)> _ Private Sub GetObjectData(ByVal info As SerializationInfo, _ ByVal context As StreamingContext) Implements ISerializable.GetObjectData info.AddValue("x", x) info.AddValue("name", name) End Sub ' The security attribute demands that code that calls ' this method have permission to perform serialization. <SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter:=True)> _ Private Sub New(ByVal info As SerializationInfo, _ ByVal context As StreamingContext) x = info.GetInt32("x") Try name = info.GetString("name") Catch e As SerializationException ' The "name" field was not serialized because ' Version1Type did not contain this field. ' Set this field to a reasonable default value. name = "Reasonable default value" End Try End Sub End Class NotInheritable Class Version1ToVersion2DeserializationBinder Inherits SerializationBinder Public Overrides Function BindToType(ByVal assemblyName As String, _ ByVal typeName As String) As Type Dim typeToDeserialize As Type = Nothing ' For each assemblyName/typeName that you want to deserialize ' to a different type, set typeToDeserialize to the desired type. Dim assemVer1 As String = [Assembly].GetExecutingAssembly().FullName Dim typeVer1 As String = GetType(Version1Type).FullName If assemblyName = assemVer1 And typeName = typeVer1 Then ' To use a type from a different assembly version, ' change the version number. ' To do this, uncomment the following code. ' assemblyName = assemblyName.Replace("1.0.0.0", "2.0.0.0") ' To use a different type from the same assembly, ' change the type name. typeName = typeName.Replace("Version1Type", "Version2Type") End If ' The following code returns the type. typeToDeserialize = Type.GetType(String.Format("{0}, {1}", typeName, _ assemblyName)) Return typeToDeserialize End Function End Class
using System; using System.IO; using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters.Binary; using System.Reflection; using System.Security.Permissions; class App { [STAThread] static void Main() { Serialize(); Deserialize(); } static void Serialize() { // To serialize the objects, you must first open a stream for writing. // Use a file stream here. FileStream fs = new FileStream("DataFile.dat", FileMode.Create); try { // Construct a BinaryFormatter and use it // to serialize the data to the stream. BinaryFormatter formatter = new BinaryFormatter(); // Construct a Version1Type object and serialize it. Version1Type obj = new Version1Type(); obj.x = 123; formatter.Serialize(fs, obj); } catch (SerializationException e) { Console.WriteLine("Failed to serialize. Reason: " + e.Message); throw; } finally { fs.Close(); } } static void Deserialize() { // Declare the Version2Type reference. Version2Type obj = null; // Open the file containing the data that you want to deserialize. FileStream fs = new FileStream("DataFile.dat", FileMode.Open); try { // Construct a BinaryFormatter and use it // to deserialize the data from the stream. BinaryFormatter formatter = new BinaryFormatter(); // Construct an instance of our the // Version1ToVersion2TypeSerialiationBinder type. // This Binder type can deserialize a Version1Type // object to a Version2Type object. formatter.Binder = new Version1ToVersion2DeserializationBinder(); obj = (Version2Type) formatter.Deserialize(fs); } catch (SerializationException e) { Console.WriteLine("Failed to deserialize. Reason: " + e.Message); throw; } finally { fs.Close(); } // To prove that a Version2Type object was deserialized, // display the object's type and fields to the console. Console.WriteLine("Type of object deserialized: " + obj.GetType()); Console.WriteLine("x = {0}, name = {1}", obj.x, obj.name); } } [Serializable] class Version1Type { public Int32 x; } [Serializable] class Version2Type : ISerializable { public Int32 x; public String name; // 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) { info.AddValue("x", x); info.AddValue("name", name); } // The security attribute demands that code that calls // this method have permission to perform serialization. [SecurityPermissionAttribute(SecurityAction.Demand,SerializationFormatter=true)] private Version2Type(SerializationInfo info, StreamingContext context) { x = info.GetInt32("x"); try { name = info.GetString("name"); } catch (SerializationException) { // The "name" field was not serialized because Version1Type // did not contain this field. // Set this field to a reasonable default value. name = "Reasonable default value"; } } } sealed class Version1ToVersion2DeserializationBinder : SerializationBinder { public override Type BindToType(string assemblyName, string typeName) { Type typeToDeserialize = null; // For each assemblyName/typeName that you want to deserialize to // a different type, set typeToDeserialize to the desired type. String assemVer1 = Assembly.GetExecutingAssembly().FullName; String typeVer1 = "Version1Type"; if (assemblyName == assemVer1 && typeName == typeVer1) { // To use a type from a different assembly version, // change the version number. // To do this, uncomment the following line of code. // assemblyName = assemblyName.Replace("1.0.0.0", "2.0.0.0"); // To use a different type from the same assembly, // change the type name. typeName = "Version2Type"; } // The following line of code returns the type. typeToDeserialize = Type.GetType(String.Format("{0}, {1}", typeName, assemblyName)); return typeToDeserialize; } }
using namespace System; using namespace System::IO; using namespace System::Runtime::Serialization; using namespace System::Runtime::Serialization::Formatters::Binary; using namespace System::Reflection; using namespace System::Security::Permissions; ref class Version1ToVersion2DeserializationBinder; [Serializable] ref class Version1Type { public: Int32 x; }; [Serializable] ref class Version2Type: public ISerializable { public: Int32 x; String^ name; // The security attribute demands that code that calls // this method have permission to perform serialization. [SecurityPermissionAttribute(SecurityAction::Demand,SerializationFormatter=true)] virtual void GetObjectData( SerializationInfo^ info, StreamingContext context ) { info->AddValue( "x", x ); info->AddValue( "name", name ); } private: // The security attribute demands that code that calls // this method have permission to perform serialization. [SecurityPermissionAttribute(SecurityAction::Demand,SerializationFormatter=true)] Version2Type( SerializationInfo^ info, StreamingContext context ) { x = info->GetInt32( "x" ); try { name = info->GetString( "name" ); } catch ( SerializationException^ ) { // The 'name' field was not serialized because Version1Type // did not contain this field. // We will set this field to a reasonable default value. name = "Reasonable default value"; } } }; ref class Version1ToVersion2DeserializationBinder sealed: public SerializationBinder { public: virtual Type^ BindToType( String^ assemblyName, String^ typeName ) override { Type^ typeToDeserialize = nullptr; // For each assemblyName/typeName that you want to deserialize to // a different type, set typeToDeserialize to the desired type. String^ assemVer1 = Assembly::GetExecutingAssembly()->FullName; String^ typeVer1 = "Version1Type"; if ( assemblyName->Equals( assemVer1 ) && typeName->Equals( typeVer1 ) ) { // To use a type from a different assembly version, // change the version number using the following line of code. // assemblyName = assemblyName.Replace("1.0.0.0", "2.0.0.0"); // To use a different type from the same assembly, // change the type name. typeName = "Version2Type"; } // The following line of code returns the type. typeToDeserialize = Type::GetType( String::Format( "{0}, {1}", typeName, assemblyName ) ); return typeToDeserialize; } }; ref class App { public: static void Serialize() { // To serialize the objects, you must first open a stream for writing. // We will use a file stream here. FileStream^ fs = gcnew FileStream( "DataFile.dat",FileMode::Create ); try { // Construct a BinaryFormatter and use it // to serialize the data to the stream. BinaryFormatter^ formatter = gcnew BinaryFormatter; // Construct a Version1Type Object and serialize it. Version1Type^ obj = gcnew Version1Type; obj->x = 123; formatter->Serialize( fs, obj ); } catch ( SerializationException^ e ) { Console::WriteLine( "Failed to serialize. Reason: {0}", e->Message ); throw; } finally { fs->Close(); } } static void Deserialize() { // Declare the Version2Type reference. Version2Type^ obj = nullptr; // Open the file containing the data that we want to deserialize. FileStream^ fs = gcnew FileStream( "DataFile.dat",FileMode::Open ); try { // Construct a BinaryFormatter and use it // to deserialize the data from the stream. BinaryFormatter^ formatter = gcnew BinaryFormatter; // Construct an instance of our // Version1ToVersion2TypeSerialiationBinder type. // This Binder type knows how to deserialize a Version1Type // Object* to a Version2Type Object. formatter->Binder = gcnew Version1ToVersion2DeserializationBinder; obj = dynamic_cast<Version2Type^>(formatter->Deserialize( fs )); } catch ( SerializationException^ e ) { Console::WriteLine( "Failed to deserialize. Reason: {0}", e->Message ); throw; } finally { fs->Close(); } // To prove that a Version2Type Object* was deserialized, // display the Object's type and fields to the console. Console::WriteLine( "Type of Object deserialized: {0}", obj->GetType() ); Console::WriteLine( "x = {0}, name = {1}", obj->x, obj->name ); } }; [STAThread] int main() { App::Serialize(); App::Deserialize(); return 0; }
import System.*; import System.IO.*; import System.Runtime.Serialization.*; import System.Runtime.Serialization.Formatters.Binary.*; import System.Reflection.*; import System.Security.Permissions.*; class App { /** @attribute STAThread() */ public static void main(String[] args) { Serialize(); Deserialize(); } //main static void Serialize() { // To serialize the objects, you must first open a stream for writing. // Use a file stream here. FileStream fs = new FileStream("DataFile.dat", FileMode.Create); try { // Construct a BinaryFormatter and use it // to serialize the data to the stream. BinaryFormatter formatter = new BinaryFormatter(); // Construct a Version1Type object and serialize it. Version1Type obj = new Version1Type(); obj.x = 123; formatter.Serialize(fs, obj); } catch (SerializationException e) { Console.WriteLine("Failed to serialize. Reason: " + e.get_Message()); } finally { fs.Close(); } } //Serialize static void Deserialize() { // Declare the Version2Type reference. Version2Type obj = null; // Open the file containing the data that you want to deserialize. FileStream fs = new FileStream("DataFile.dat", FileMode.Open); try { // Construct a BinaryFormatter and use it // to deserialize the data from the stream. BinaryFormatter formatter = new BinaryFormatter(); // Construct an instance of our the // Version1ToVersion2TypeSerialiationBinder type. // This Binder type can deserialize a Version1Type // object to a Version2Type object. formatter.set_Binder(new Version1ToVersion2DeserializationBinder()); obj = (Version2Type)(formatter.Deserialize(fs)); } catch (SerializationException e) { Console.WriteLine("Failed to deserialize. Reason: " + e.get_Message()); } finally { fs.Close(); } // To prove that a Version2Type object was deserialized, // display the object's type and fields to the console. Console.WriteLine("Type of object deserialized: " + obj.GetType()); System.Console.WriteLine("x = {0}, name = {1}", (System.Int32)obj.x , obj.name); } //Deserialize } //App /** @attribute Serializable() */ class Version1Type { public int x; } //Version1Type /** @attribute Serializable() */ class Version2Type implements ISerializable { public int x; public String name; // The security attribute demands that code that calls // this method have permission to perform serialization. /** @attribute SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true) */ public void GetObjectData(SerializationInfo info,StreamingContext context) { info.AddValue("x", x); info.AddValue("name", name); } //ISerializable.GetObjectData // The security attribute demands that code that calls // this method have permission to perform serialization. /** @attribute SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true) */ private Version2Type(SerializationInfo info, StreamingContext context) { x = info.GetInt32("x"); try { name = info.GetString("name"); } catch (SerializationException exp) { // The "name" field was not serialized because Version1Type // did not contain this field. // Set this field to a reasonable default value. name = "Reasonable default value"; } } //Version2Type } //Version2Type final class Version1ToVersion2DeserializationBinder extends SerializationBinder { public Type BindToType(String assemblyName, String typeName) { Type typeToDeserialize = null; // For each assemblyName/typeName that you want to deserialize to // a different type, set typeToDeserialize to the desired type. String assemVer1 = Assembly.GetExecutingAssembly().get_FullName(); String typeVer1 = "Version1Type"; if (assemblyName.Equals(assemVer1) && typeName.Equals(typeVer1)) { // To use a type from a different assembly version, // change the version number. // To do this, uncomment the following line of code. // assemblyName = assemblyName.Replace("1.0.0.0", "2.0.0.0"); // To use a different type from the same assembly, // change the type name. typeName = "Version2Type"; } // The following line of code returns the type. typeToDeserialize = Type.GetType(String.Format("{0}, {1}", typeName , assemblyName)); return typeToDeserialize; } //BindToType } //Version1ToVersion2DeserializationBinder
プラットフォーム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。
バージョン情報参照- SerializationBinder.BindToType メソッドのページへのリンク
