为何需要序列化，以及序列化的一些操作【收录】

为什么需要序列化，以及序列化的一些操作【收录】

接着当然要创建一个文件了,这个文件就是用来存放我们要序列化的信息了.

FileStream fs = new FileStream(@"C:\book.dat",FileMode.Create);

序列化的实现也很简单,like this:

BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(fs, book);

很简单吧!现在我列出整个原代码,包括反序列化.

static void Main(string[] args)
{
Book book = new Book("Day and Night", 30.0f, "Bruce");

using(FileStream fs = newFileStream(@"C:\book.dat", FileMode.Create))
{
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(fs, book);
}

book = null;

using(FileStream fs = newFileStream(@"C:\book.dat", FileMode.Open))
{
BinaryFormatter formatter = new BinaryFormatter();
book = (Book)formatter.Deserialize(fs);//在这里大家要注意咯,他的返回值是object
}
}

有不对的地方,请大家多多纠正.....

注意一定不要忘了： using ?System.Runtime.Serialization.Formatters.Binary; ?
? ? 命名空间。

收录二：

原先一直用BinaryFormatter来序列化挺好，可是最近发现在WinCE下是没有办法进行BinaryFormatter操作，很不爽，只能改成了BinaryWriter和BinaryReader来读写，突然想到能不能用XML来序列化？于是在网上查了些资料便写了些实践性代码，做些记录，避免以后忘记。

序列化对象

??? public class People
??? {
??????? [XmlAttribute("NAME")]
??????? public string Name
??????? { set; get; }
??????? [XmlAttribute("AGE")]
??????? public int Age
??????? { set; get; }
??? }
??? [XmlRoot("Root")]
??? public class Student : People
??? {
??????? [XmlElement("CLASS")]
??????? public string Class
??????? { set; get; }
??????? [XmlElement("NUMBER")]
??????? public int Number
??????? { set; get; }
??? }

void Main(string[] args)

{

???????????Student stu = new Student()
??????????? {
???????????????Age = 10,
???????????????Class = "Class One",
???????????????Name = "Tom",
???????????????Number = 1
??????????? };
???????????XmlSerializer ser = new XmlSerializer(typeof(Student));
???????????ser.Serialize(File.Create("C:\\x.xml"), stu);

}

反序列化对象

???????????XmlSerializer ser = new XmlSerializer(typeof(Student));
??????????? Student stu= ser.Deserialize(File.OpenRead("C:\\x.xml")) as Student;

对象数组序列化

void Main(string[] args)

{

???????????List<Student> stuList = new List<Student>();
???????????stuList.Add(new Student() { Age = 10, Number = 1, Name = "Tom", Class= "Class One" });
???????????stuList.Add(new Student() { Age = 11, Number = 2, Name = "Jay", Class= "Class Two" });
???????????stuList.Add(new Student() { Age = 12, Number = 3, Name = "Pet", Class= "Class One" });
???????????stuList.Add(new Student() { Age = 13, Number = 4, Name = "May", Class= "Class Three" });
???????????stuList.Add(new Student() { Age = 14, Number = 5, Name = "Soy", Class= "Class Two" });
???????????XmlSerializer ser = new XmlSerializer(typeof(List<Student>));
???????????ser.Serialize(File.Create("C:\\x.xml"), stuList);

}

对象数组反序列

???????????XmlSerializer ser = new XmlSerializer(typeof(List<Student>));
???????????List<Student> stuList =ser.Deserialize(File.OpenRead("C:\\x.xml")) as List<Student>;
??????????? foreach(Student s in stuList)
??????????? {
???????????????MessageBox.Show(string.Format("{0} : {1} : {2} : {3}",
???????????????????s.Name, s.Age, s.Class, s.Number));
??????????? }

序列化Dirctionary

??? public struct DirectionList
??? {
??????? [XmlAttribute("Name")]
??????? public string Name;
??????? [XmlElement("Value")]
??????? public int Value;
??? }

void Main(string[] args)

{

???????????Dictionary<string, int> list = new Dictionary<string, int>();
???????????list.Add("1", 100);
???????????list.Add("2", 200);
??????????? list.Add("3",300);
???????????list.Add("4", 400);
???????????list.Add("5", 500);
???????????list.Add("6", 600);
???????????list.Add("7", 700);
???????????list.Add("8", 800);
???????????list.Add("9", 900);

???????????List<DirectionList> dirList = new List<DirectionList>();
??????????? foreach (vars in list)
??????????? {
???????????????dirList.Add(new DirectionList() { Name = s.Key, Value = s.Value });
??????????? }
???????????XmlSerializer ser = new XmlSerializer(typeof(List<DirectionList>));
???????????ser.Serialize(File.Create("C:\\x.xml"), dirList);

}

这里还要讲一点，在XmlSerializer中，不支持Dirctionary<>类型的对象，所以在序列化这种最常见类型的时候，只能按照它的格式先创建一个可以别序列化的类型，这里我定义了一个结构体，当然你也可以定义成其他的类。将Dictionary<>中的数据依次放进结构体以后就可以放入流中了。

[XmlAttribute("Name")]意思是将这个字段作为xml的属性，属性名跟在“”中

[XmlElement("Value")]意思是将这个字段做为xml的元素。

反序列化Dirctionary

???????????XmlSerializer ser = new XmlSerializer(typeof(List<DirectionList>));
???????????List<DirectionList> dirList = ser.Deserialize(
???????????????File.OpenRead("C:\\x.xml")) as List<DirectionList>;
??????????? foreach (varv in dirList)
??????????? {
???????????????Console.WriteLine("{0} : {1}", v.Name, v.Value);
??????????? }

其实我并不喜欢这个名称，感觉有点生化危机的feel，但是也就是这样了，没有太炫的地方，Deserialize反序列化。真希望.Net能集成Dirctionary<>对象，那我们这些懒人就方便了。

在需要序列化的队伍中，数组是很常见的类型，其次就是图片了

序列化图片

??? public struct ImageStruct
??? {
??????? [XmlAttribute("Number")]
??????? public int number;
??????? [XmlElement("Image")]
??????? public byte[] picture;
??? }

void Main(string[] args)

{

???????????ImageStruct s = new ImageStruct() { number = 1, picture =File.ReadAllBytes(@"11.jpg") };
???????????XmlSerializer ser = new XmlSerializer(typeof(ImageStruct));
??????????? FileStreamfs = File.Create("c:\\x.xml");
???????????ser.Serialize(fs, s);
??????????? fs.Close();

}

一样的，采用结构体来保存图片，这里我还加了个图片的名字，到时候查找起来也方便一些

图片反序列化

???????????XmlSerializer ser = new XmlSerializer(typeof(ImageStruct));
??????????? ImageStructs = (ImageStruct)ser.Deserialize(File.OpenRead("c:\\x.xml"));
??????????? pictureBox1.Image= Image.FromStream(new MemoryStream(s.picture));

没有花头的方式，利用memorystream来做缓存，这样会比较快一点，实际上我并没有怎么感觉。

图片数组序列化

??? public struct ImageStruct
??? {
??????? [XmlAttribute("Number")]
??????? public int number;
??????? [XmlElement("Image")]
??????? public byte[] picture;
??? }

void Main(string[] args)

{

???????????List<ImageStruct> imageList = new List<ImageStruct>();
???????????imageList.Add(new ImageStruct()
??????????? {
???????????????number = 1,
???????????????picture = File.ReadAllBytes(@"11.jpg")
??????????? });
???????????imageList.Add(new ImageStruct()
??????????? {
???????????????number = 2,
???????????????picture = File.ReadAllBytes(@"22.jpg")
??????????? });

???????????XmlSerializer ser = new XmlSerializer(typeof(List<ImageStruct>));
??????????? FileStreamfs = File.Create("c:\\x.xml");
???????????ser.Serialize(fs, imageList);
??????????? fs.Close();

}

图片数组反序列化

???????????XmlSerializer ser = new XmlSerializer(typeof(List<ImageStruct>));
???????????List<ImageStruct> s = (List<ImageStruct>)ser.Deserialize(File.OpenRead("c:\\x.xml"));
??????????? var im =from i in s
????????????????????where i.number == 1
????????????????????select i.picture;

???????????//var im = s.Where(p => p.number == 1).Select(p => p.picture);
??????????? foreach (varimage in im)
??????????? {
???????????????pictureBox1.Image = Image.FromStream(
???????????????????new MemoryStream(image));
??????????? }

这里还对数组结构进行了Linq查询，这样就可以很方便的查询图片了。

收录三：

序列化方便对象的传输及储存； ?
? 它能将对象转成如XML/Bit流； ?
? 它是Session(进程外/SqlServer模式）,ViewState,WebService,Remoting等的基础。

收录四：

例如学生类 ?
? public ? class ? Student ?
? { ?
? public ? int ? id; ?
? public ? string ? name; ?
? public ? bool ? sex; ?
? public ? DateTime ? birthday; ?
? ... ?
? } ?
? ?
? // ? 序列化为byte[] ?
? MemoryStream ? fs ? = ? new ? MemoryStream(); ?
? byte[] ? tmp ? = ? null; ?
? BinaryFormatter ? formatter ? = ? new ?BinaryFormatter(); ?
? formatter.Serialize(fs, ? student); ?
? tmp ? = ? fs.ToArray(); ?
? 将tmp作为bianry数据存到数据库 ?
? ?
? // ? 反序列化直接生成Student类 ?
? MemoryStream ? fs ? = ? new ? MemoryStream(); ?
? Student ? student ? = ? null; ?
? fs ? = ? new ? MemoryStream(tmp); ?
? fs.Position ? = ? 0; ?
? BinaryFormatter ? formatter ? = ? new ?BinaryFormatter(); ?
? student ? = ? formatter.Deserialize(fs); ?
? 操作方便不用一一赋值。 ?
? ?
? 不过也有一些问题，如存到数据库以后，类Student又添加了属性，于是就反序列化不出来了！

为何需要序列化以及序列化的一些操作

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