这篇文章主要介绍了C#如何进行序列化和反序列化的相关知识,内容详细易懂,操作简单快捷,具有一定借鉴价值,相信大家阅读完这篇C#如何进行序列化和反序列化文章都会有所收获,下面我们一起来看看吧。
首先把需要序列化的类打上[Serializable]特性,如果某个字段不需要被序列化,就打上[NonSerialized]特性。
[Serializable] public class Meeting { public string _name; [NonSerialized] public string _location; public Meeting(string name, string location) { this._name = name; this._location = location; } }
对象序列化后需要一个载体文件,以下的Meeting.binary文件用来存储对象的状态。
static void Main(string[] args) { Meeting m1 = new Meeting("年终总结","青岛"); Meeting m2; //先序列化 SerializedWithBinaryFormatter(m1,"Meeting.binary"); m2 = (Meeting) DeserializeWithBinaryFormatter("Meeting.binary"); Console.WriteLine(m2._name); Console.WriteLine(m2._location ?? "_location字段没有被序列化"); Console.ReadKey(); } //序列化 static void SerializedWithBinaryFormatter(object obj, string fileName) { //打开文件写成流 Stream streamOut = File.OpenWrite(fileName); BinaryFormatter formatter = new BinaryFormatter(); //把对象序列化到流中 formatter.Serialize(streamOut, obj); //关闭流 streamOut.Close(); } //反序列化 static object DeserializeWithBinaryFormatter(string fileName) { //打开文件读成流 Stream streamIn = File.OpenRead(fileName); BinaryFormatter formatter = new BinaryFormatter(); object obj = formatter.Deserialize(streamIn); streamIn.Close(); return obj; }
Meeting.binary文件在bin/debug文件夹中。
如果想对序列化的过程有更多的控制,应该使用ISerializable接口,通过它的GetObjectData方法可以改变对象的字段值。
[Serializable] public class Location : ISerializable { public int x; public int y; public string name; public Location(int x, int y, string name) { this.x = x; this.y = y; this.name = name; } protected Location(SerializationInfo info, StreamingContext context) { x = info.GetInt32("i"); y = info.GetInt32("j"); name = info.GetString("k"); } public void GetObjectData(SerializationInfo info, StreamingContext context) { info.AddValue("i", x + 1); info.AddValue("j", y + 1); info.AddValue("k", name + "HELLO"); } }
以上,不仅要实现接口方法GetObjectData,还需要提供对象的重载构造函数,从SerializationInfo实例中获取值。
在客户端:
Location loc1 = new Location(1,2,"qingdao"); Location loc2; //序列化 SerializedWithBinaryFormatter(loc1, "Location.binary"); loc2 = (Location) DeserializeWithBinaryFormatter("Location.binary"); Console.WriteLine(loc2.x); Console.WriteLine(loc2.y); Console.WriteLine(loc2.name); Console.ReadKey();
以上,使用BinaryFormatter类进行序列化和反序列化,存储的文件格式是二进制的,例如,打开Meeting.binary文件,我们看到:
有时候,我们希望文件的格式是xml。
XmlSerializer类进行序列化的存储文件是xml格式。用XmlSerializer类进行序列化的类不需要打上[Serializable]特性。
public class Car { [XmlAttribute(AttributeName = "model")] public string type; public string code; [XmlIgnore] public int age; [XmlElement(ElementName = "mileage")] public int miles; public Status status; public enum Status { [XmlEnum("使用中")] Normal, [XmlEnum("修复中")] NotUse, [XmlEnum("不再使用")] Deleted } }
在客户端:
//打开写进流 Stream streamOut = File.OpenWrite("Car.xml"); System.Xml.Serialization.XmlSerializer x = new XmlSerializer(car1.GetType()); //序列化到流中 x.Serialize(streamOut, car1); streamOut.Close(); //打开读流 Stream streamIn = File.OpenRead("Car.xml"); //反序列化 Car car2 = (Car) x.Deserialize(streamIn); Console.WriteLine(car2.type); Console.WriteLine(car2.code); Console.WriteLine(car2.miles); Console.WriteLine(car2.status); Console.ReadKey();
运行,打开bin/debug中的Car.xml文件如下:
<?xml version="1.0"?> <Car xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" model="sedan"> <code>001</code> <mileage>1000</mileage> <status>使用中</status> </Car>
类名Car成了xml的根节点
打上[XmlAttribute(AttributeName = "model")]特性的字段变成了根节点的属性,AttributeName为属性别名
枚举项可打上[XmlEnum("使用中")]特性
如果一个类中包含集合属性,比如以下的Department类包含一个类型List<Employee>的集合属性Employees。
public class Department { public Department() { Employees = new List<Employee>(); } public string Name { get; set; } [XmlArray("Staff")] public List<Employee> Employees { get; set; } } public class Employee { public string Name { get; set; } public Employee() { } public Employee(string name) { Name = name; } }
在客户端:
class Program { static void Main(string[] args) { var department = new Department(); department.Name = "销售部"; department.Employees.Add(new Employee("张三")); department.Employees.Add(new Employee("李四")); XmlSerializer serializer = new XmlSerializer(department.GetType()); //打开写进流 Stream streamOut = File.OpenWrite("Department.xml"); serializer.Serialize(streamOut, department); streamOut.Close(); } }
查看bin/debug中的Department.xml文件。
<?xml version="1.0"?> <Department xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Name>销售部</Name> <Staff> <Employee> <Name>张三</Name> </Employee> <Employee> <Name>李四</Name> </Employee> </Staff> </Department>
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