Serialization using C#
(Source: http://msdn.microsoft.com/en-us/library/ms233843.aspx)
Serialization is the process of converting an object into a stream of bytes in order to persist it to memory, a database, or a file. Its main purpose is to save the state of an object in order to be able to recreate it when needed. The reverse process is called deserialization.
process is called deserialization.
Serialization is the process of converting an object into a stream of bytes in order to persist it to memory, a database, or a file. Its main purpose is to save the state of an object in order to be able to recreate it when needed. The reverse process is called deserialization.
process is called deserialization.
This illustration shows the overall process of serialization.
The object is serialized to a
stream, which carries not just the data, but information about the
object's type, such as its version, culture, and assembly name. From
that stream, it can be stored in a database, a file, or memory.
The object is serialized to a
stream, which carries not just the data, but information about the
object's type, such as its version, culture, and assembly name. From
that stream, it can be stored in a database, a file, or memory.Uses for Serialization
Serialization allows the developer to save the state of an object
and recreate it as needed, providing storage of objects as well as data
exchange. Through serialization, a developer can perform actions like
sending the object to a remote application by means of a Web Service,
passing an object from one domain to another, passing an object through a
firewall as an XML string, or maintaining security or user-specific
information across applications.
Making an Object Serializable
To serialize an object, you need the object to be serialized, a stream to contain the serialized object, and a Formatter. System.Runtime.Serialization contains the classes necessary for serializing and deserializing objects.
Apply the SerializableAttribute attribute to a type to indicate that instances of this type can be serialized. A SerializationException exception is thrown if you attempt to serialize but the type does not have the SerializableAttribute attribute.
If you do not want a field within your class to be serializable, apply the NonSerializedAttribute attribute. If a field of a serializable type contains a pointer, a handle, or some other data structure that is specific to a particular environment, and the field cannot be meaningfully reconstituted in a different environment, then you may want to make it nonserializable.
If a serialized class contains references to objects of other classes that are marked SerializableAttribute, those objects will also be serialized.
Apply the SerializableAttribute attribute to a type to indicate that instances of this type can be serialized. A SerializationException exception is thrown if you attempt to serialize but the type does not have the SerializableAttribute attribute.
If you do not want a field within your class to be serializable, apply the NonSerializedAttribute attribute. If a field of a serializable type contains a pointer, a handle, or some other data structure that is specific to a particular environment, and the field cannot be meaningfully reconstituted in a different environment, then you may want to make it nonserializable.
If a serialized class contains references to objects of other classes that are marked SerializableAttribute, those objects will also be serialized.
Either binary or XML
serialization can be used. In binary serialization, all members, even
those that are read-only, are serialized, and performance is enhanced.
XML serialization provides more readable code, as well as greater
flexibility of object sharing and usage for interoperability purposes.
Binary Serialization
Binary serialization uses binary encoding to produce compact
serialization for uses such as storage or socket-based network streams.
XML Serialization
XML serialization serializes the public fields and properties of an
object, or the parameters and return values of methods, into an XML
stream that conforms to a specific XML Schema definition language (XSD)
document. XML serialization results in strongly typed classes with
public properties and fields that are converted to XML. System.Xml.Serialization contains the classes necessary for serializing and deserializing XML.
You can apply attributes to classes and class members in order to control the way the XmlSerializer serializes or deserializes an instance of the class.
You can apply attributes to classes and class members in order to control the way the XmlSerializer serializes or deserializes an instance of the class.
SOAP Serialization
XML serialization can also be used to serialize objects into XML
streams that conform to the SOAP specification. SOAP is a protocol based
on XML, designed specifically to transport procedure calls using XML.
As with regular XML serialization, attributes can be used to control the
literal-style SOAP messages generated by an XML Web service.
Serialization can be performed
in two ways, basic and custom. Basic serialization uses the .NET
Framework to automatically serialize the object.
Basic Serialization
The only requirement in basic serialization is that the object has the SerializableAttribute attribute applied. The NonSerializedAttribute can be used to keep specific fields from being serialized.
When you use basic serialization, the versioning of objects may create problems, in which case custom serialization may be preferable. Basic serialization is the easiest way to perform serialization, but it does not provide much control over the process.
When you use basic serialization, the versioning of objects may create problems, in which case custom serialization may be preferable. Basic serialization is the easiest way to perform serialization, but it does not provide much control over the process.
Custom Serialization
In custom serialization, you can specify exactly which objects will
be serialized and how it will be done. The class must be marked SerializableAttribute and implement the ISerializable interface.
If you want your object to be deserialized in a custom manner as well, you must use a custom constructor.
If you want your object to be deserialized in a custom manner as well, you must use a custom constructor.
Designer serialization is a
special form of serialization that involves the kind of object
persistence usually associated with development tools. Designer
serialization is the process of converting an object graph into a source
file that can later be used to recover the object graph. A source file
can contain code, markup, or even SQL table information. For more
information, see Designer Serialization Overview.
