六、用DataContractSerialize类序列化XML

一、层次结构

基类：XmlObjectSerializer

派生类：

• DataContractSerializer
• NetDataContractSerializer
• DataContractJsonSerializer

需要引入的程序集：

• System.Runtime.Serialization.dll
• System.Runtime.Serialization.Primitives.dll

二、实体类

[DataContract(Name = "order", Namespace = "http://a/order")]
//[KnownType(typeof(order))]
public class Order
{
    public Order(Guid id, Product product)
    {
        this.OrderID = id;
        this.Product = product;
    }

    [DataMember(Name = )]
    public Guid OrderID { set; get; }

    [DataMember]
    public Product Product { set; get; }

}

[DataContract(Name = "product", Namespace = "http://a/product")] //IsRequired=false,EmitDefaultValue=false
public class Product
{
    public Product(Guid id, string productArea)
    {
        this.ProductID = id;
        this.productArea = productArea;
    }

    [DataMember(Name = )]
    public Guid ProductID { set; get; }

    [DataMember]
    private string productArea { set; get; } //私有属性也可以序列化。
}

二、序列化与反序列化

Product product = new Product(Guid.NewGuid(), "XiaMen");
Order order = new Order(Guid.NewGuid(), product);
string filename = @"C:\s.xml";
using (FileStream fs = new FileStream(filename, FileMode.Create))
{
    DataContractSerializer serializer = new DataContractSerializer(typeof(Order));
    using (XmlDictionaryWriter writer = XmlDictionaryWriter.CreateTextWriter(fs))
    {
        serializer.WriteObject(writer, order);
    }
}
Process.Start(filename);

using (FileStream fs = new FileStream(filename, FileMode.Open))
{
    DataContractSerializer serializer = new DataContractSerializer(typeof(Order));
    using (XmlDictionaryReader reader = XmlDictionaryReader.CreateTextReader(fs, new XmlDictionaryReaderQuotas()))
    {
        order = serializer.ReadObject(reader) as Order;
    }
}

三、得到的XML内容

<?xml version="1.0" encoding="utf-8"?>

<order xmlns="http://a/order" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  <Product xmlns:a="http://a/product">
    <a:productArea>XiaMen</a:productArea>
    <a:id>d3b4c977-d052-4fd4-8f59-272e56d875a8</a:id>
  </Product>
  <id>96d0bb44-cee4-41b6-ae20-5d801c1b3dc9</id>
</order>