c# XML序列化与反序列化
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
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)
{
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 (var s 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 (var v 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));
FileStream fs = 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));
ImageStruct s = (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>));
FileStream fs = 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 (var image 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。
--------------------------------------------------------------------------------------------------
要序列化的对象的类：
[Serializable]
public class Person
{
private string name;
public string Name
{
get
{
return name;
}
set
{
name=value;
}
}
public string Sex;
public int Age=31;
public Course[] Courses;
public Person()
{
}
public Person(string Name)
{
name=Name;
Sex="男";
}
}
[Serializable]
public class Course
{
public string Name;
[XmlIgnore]public string Description;
public Course()
{
}
public Course(string name,string description)
{
Name=name;
Description=description;
}
}
进行序列化及反序列化的测试类：
class Test
{
//序列化
public void Serialiaze()
{
Person c=new Person("cyj")
c.Courses=new Course[2];
c.Courses[0]=new Course("英语","交流工具")
c.Courses[1]=new Course("数学","自然科学")
XmlSerializer xs=new XmlSerializer(typeof(Person));
Stream stream = new FileStream("c:\\cyj.xml", FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
xs.Serialize(stream, c);
stream.Close();
}
//反序列化
public void Deserialize()
{
XmlSerializer xs=new XmlSerializer(typeof(Person));
Stream stream = new FileStream("c:\\cyj.xml", FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
Person p=(Person)xs.Deserialize(stream);
Console.WriteLine(p.Name);
Console.WriteLine(p.Age.ToString());
Console.WriteLine(p.Courses.Length.ToString());
Console.Read();
}
}
格式化后Xml的文档内容为：
<?xml version="1.0"?>
<Person xmlns:xsd=http://www.w3.org/2001/XMLSchema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Sex>男</Sex>
<Age>31</Age>
<Courses>
<Course>
<Name>英语</Name>
</Course>
<Course>
<Name>数学</Name>
</Course>
</Courses>
<Name>cyj</Name>
</Person>
转自http://blog.csdn.net/ljsql/archive/2009/12/22/5057588.aspx
