SerializationInfo 类
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
存储对对象进行序列化或反序列化所需的全部数据。 此类不能被继承。
public ref class SerializationInfo sealedpublic sealed class SerializationInfo[System.Runtime.InteropServices.ComVisible(true)]
public sealed class SerializationInfotype SerializationInfo = class[<System.Runtime.InteropServices.ComVisible(true)>]
type SerializationInfo = classPublic NotInheritable Class SerializationInfo- 继承
-
SerializationInfo
- 属性
示例
下面的代码示例演示了 SerializationInfo 用于自定义序列化和反序列化各种值的 。
using namespace System;
using namespace System::IO;
using namespace System::Collections;
using namespace System::Runtime::Serialization::Formatters::Binary;
using namespace System::Runtime::Serialization;
ref class SingletonSerializationHelper;
// There should be only one instance of this type per AppDomain.
[Serializable]
public ref class Singleton sealed: public ISerializable
{
private:
// This is the one instance of this type.
static Singleton^ theOneObject = gcnew Singleton;
public:
// Here are the instance fields.
String^ someString;
Int32 someNumber;
private:
// Private constructor allowing this type to construct the singleton.
Singleton()
{
// Do whatever is necessary to initialize the singleton.
someString = "This is a String* field";
someNumber = 123;
}
public:
// A method returning a reference to the singleton.
static Singleton^ GetSingleton()
{
return theOneObject;
}
// A method called when serializing a Singleton.
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::LinkDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::SerializationFormatter)]
virtual void GetObjectData( SerializationInfo^ info, StreamingContext context )
{
// Instead of serializing this Object*, we will
// serialize a SingletonSerializationHelp instead.
info->SetType( SingletonSerializationHelper::typeid );
// No other values need to be added.
}
// NOTE: ISerializable*'s special constructor is NOT necessary
// because it's never called
};
[Serializable]
private ref class SingletonSerializationHelper sealed: public IObjectReference
{
public:
// This Object* has no fields (although it could).
// GetRealObject is called after this Object* is deserialized
virtual Object^ GetRealObject( StreamingContext context )
{
// When deserialiing this Object*, return a reference to
// the singleton Object* instead.
return Singleton::GetSingleton();
}
};
[STAThread]
int main()
{
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;
// Create an array with multiple elements refering to
// the one Singleton Object*.
array<Singleton^>^a1 = {Singleton::GetSingleton(),Singleton::GetSingleton()};
// This displays S"True".
Console::WriteLine( "Do both array elements refer to the same Object? {0}", (a1[ 0 ] == a1[ 1 ]) );
// Serialize the array elements.
formatter->Serialize( fs, a1 );
// Deserialize the array elements.
fs->Position = 0;
array<Singleton^>^a2 = (array<Singleton^>^)formatter->Deserialize( fs );
// This displays S"True".
Console::WriteLine( "Do both array elements refer to the same Object? {0}", (a2[ 0 ] == a2[ 1 ]) );
// This displays S"True".
Console::WriteLine( "Do all array elements refer to the same Object? {0}", (a1[ 0 ] == a2[ 0 ]) );
}
catch ( SerializationException^ e )
{
Console::WriteLine( "Failed to serialize. Reason: {0}", e->Message );
throw;
}
finally
{
fs->Close();
}
return 0;
}
using System;
using System.Text;
using System.IO;
// Add references to Soap and Binary formatters.
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization.Formatters.Soap ;
using System.Runtime.Serialization;
[Serializable]
public class MyItemType : ISerializable
{
public MyItemType()
{
// Empty constructor required to compile.
}
// The value to serialize.
private string myProperty_value;
public string MyProperty
{
get { return myProperty_value; }
set { myProperty_value = value; }
}
// Implement this method to serialize data. The method is called
// on serialization.
public void GetObjectData(SerializationInfo info, StreamingContext context)
{
// Use the AddValue method to specify serialized values.
info.AddValue("props", myProperty_value, typeof(string));
}
// The special constructor is used to deserialize values.
public MyItemType(SerializationInfo info, StreamingContext context)
{
// Reset the property value using the GetValue method.
myProperty_value = (string) info.GetValue("props", typeof(string));
}
}
// This is a console application.
public static class Test
{
static void Main()
{
// This is the name of the file holding the data. You can use any file extension you like.
string fileName = "dataStuff.myData";
// Use a BinaryFormatter or SoapFormatter.
IFormatter formatter = new BinaryFormatter();
//IFormatter formatter = new SoapFormatter();
Test.SerializeItem(fileName, formatter); // Serialize an instance of the class.
Test.DeserializeItem(fileName, formatter); // Deserialize the instance.
Console.WriteLine("Done");
Console.ReadLine();
}
public static void SerializeItem(string fileName, IFormatter formatter)
{
// Create an instance of the type and serialize it.
MyItemType t = new MyItemType();
t.MyProperty = "Hello World";
FileStream s = new FileStream(fileName , FileMode.Create);
formatter.Serialize(s, t);
s.Close();
}
public static void DeserializeItem(string fileName, IFormatter formatter)
{
FileStream s = new FileStream(fileName, FileMode.Open);
MyItemType t = (MyItemType)formatter.Deserialize(s);
Console.WriteLine(t.MyProperty);
}
}
Imports System.Text
Imports System.IO
' Add references to Soap and Binary formatters.
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Runtime.Serialization.Formatters.Soap
Imports System.Runtime.Serialization
<Serializable()> _
Public Class MyItemType
Implements ISerializable
' Empty constructor required to compile.
Public Sub New()
End Sub
' The value to serialize.
Private myProperty_value As String
Public Property MyProperty() As String
Get
Return myProperty_value
End Get
Set(value As String)
myProperty_value = value
End Set
End Property
' Implement this method to serialize data. The method is called
' on serialization.
Public Sub GetObjectData(info As SerializationInfo, context As StreamingContext) Implements ISerializable.GetObjectData
' Use the AddValue method to specify serialized values.
info.AddValue("props", myProperty_value, GetType(String))
End Sub
' The special constructor is used to deserialize values.
Public Sub New(info As SerializationInfo, context As StreamingContext)
' Reset the property value using the GetValue method.
myProperty_value = DirectCast(info.GetValue("props", GetType(String)), String)
End Sub
End Class
' This is a console application.
Public Class Test
Public Shared Sub Main()
' This is the name of the file holding the data. You can use any file extension you like.
Dim fileName As String = "dataStuff.myData"
' Use a BinaryFormatter or SoapFormatter.
Dim formatter As IFormatter = New BinaryFormatter()
' Dim formatter As IFormatter = New SoapFormatter()
Test.SerializeItem(fileName, formatter)
' Serialize an instance of the class.
Test.DeserializeItem(fileName, formatter)
' Deserialize the instance.
Console.WriteLine("Done")
Console.ReadLine()
End Sub
Public Shared Sub SerializeItem(fileName As String, formatter As IFormatter)
' Create an instance of the type and serialize it.
Dim myType As New MyItemType()
myType.MyProperty = "Hello World"
Dim fs As New FileStream(fileName, FileMode.Create)
formatter.Serialize(fs, myType)
fs.Close()
End Sub
Public Shared Sub DeserializeItem(fileName As String, formatter As IFormatter)
Dim fs As New FileStream(fileName, FileMode.Open)
Dim myType As MyItemType = DirectCast(formatter.Deserialize(fs), MyItemType)
Console.WriteLine(myType.MyProperty)
End Sub
End Class
注解
此类由具有自定义序列化行为的 对象使用。 或 GetObjectData 上的 ISerializableISerializationSurrogate 方法使用 SerializationInfo 要序列化的每条信息的名称、类型和值填充存储区。 在反序列化期间，相应的函数可以提取此信息。
对象在序列化时使用 方法添加到SerializationInfo存储区，AddValue并在反序列化时使用 GetValue 方法从SerializationInfo存储中提取对象。
有关自定义序列化的详细信息，请参阅 自定义序列化。
构造函数
| SerializationInfo(Type, IFormatterConverter) |
创建 SerializationInfo 类的新实例。 |
| SerializationInfo(Type, IFormatterConverter, Boolean) |
初始化 SerializationInfo 类的新实例。 |
属性
| AssemblyName |
仅在序列化期间获取或设置要序列化的类型的程序集名称。 |
| FullTypeName |
获取或设置要序列化的 Type 的全名。 |
| IsAssemblyNameSetExplicit |
获取是否已显式设置程序集名称。 |
| IsFullTypeNameSetExplicit |
获取是否已显式设置完整类型名称。 |
| MemberCount |
获取已添加到 SerializationInfo 存储中的成员数目。 |
| ObjectType |
返回要串行化的对象的类型。 |