[C#基础]关于何时使用XmlSerializer的构造函数(Type, Type[])

标签：xmlserialize   c#   

首先引用msdn上的内容，是关于XmlSerializer的构造函数(Type, Type[])的：

默认情况下，如果某公共属性或字段返回对象或对象数组，则将自动序列化此对象类型。但是，如果某个类包含返回Object类型的数组的字段或属性，则可以将任何对象插入此数组。在此情况下，必须指示 XmlSerializer，请求将要插入到 Object 数组的所有可能的对象类型。若要执行该操作，请使用 extraTypes 参数指定要序列化或反序列化的其他对象类型。

还可以使用 extraTypes 参数指定从基类派生的类型。例如，假设有一个名为 Phone 的基类，并且一个名为 InternationalPhone 的类从该基类派生。同时，使用 extraTypes参数来指定派生类型。

具体链接：https://msdn.microsoft.com/zh-cn/library/e5aakyae(v=vs.80).aspx

第一种使用的情况：

这里给出测试代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    public class A 
    {
        public string x = "aaa";
    }

    public class B : A
    {
        public int i = 1;
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;

namespace ConsoleApplication1
{
    public class UserInfo
    {
        public int userId;
        public string userName;
        public A a;
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            UserInfo info = new UserInfo() { userId = 1, userName = "Guozhijian", a = new A() };
            string s;

            using (StringWriter sw = new StringWriter())
            {
                XmlSerializer xz = new XmlSerializer(info.GetType());
                xz.Serialize(sw, info);
                s = sw.ToString();
            }
            Console.WriteLine(s);
            Console.ReadLine();
        }
    }
}

UserInfo info = new UserInfo() { userId = 1, userName = "Guozhijian", a = new B() };

将Main函数修改如下：

static void Main(string[] args)
        {
            Type[] types = new Type[] { typeof(B)};
            UserInfo info = new UserInfo() { userId = 1, userName = "Guozhijian", a = new B() };
            string s;

            using (StringWriter sw = new StringWriter())
            {
                XmlSerializer xz = new XmlSerializer(info.GetType(),types);
                xz.Serialize(sw, info);
                s = sw.ToString();
            }
            Console.WriteLine(s);
            Console.ReadLine();
        }

第二种使用的情况：

这里给出测试代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;

namespace ConsoleApplication1
{
    public class UserInfo
    {
        public int userId;
        public string userName;
        public Object[] a;
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            A a1 = new A();
            a1.x = "a1";
            A a2 = new A();
            a2.x = "a2";
            A[] aArray = new A[] { a1, a2 };
            UserInfo info = new UserInfo() { userId = 1, userName = "Guozhijian", a = aArray };
            string s;

            using (StringWriter sw = new StringWriter())
            {
                XmlSerializer xz = new XmlSerializer(info.GetType());
                xz.Serialize(sw, info);
                s = sw.ToString();
            }
            Console.WriteLine(s);
            Console.ReadLine();
        }
    }
}

将Main函数修改如下：

static void Main(string[] args)
        {
            Type[] types = new Type[] { typeof(A)};
            A a1 = new A();
            a1.x = "a1";
            A a2 = new A();
            a2.x = "a2";
            A[] aArray = new A[] { a1, a2 };
            UserInfo info = new UserInfo() { userId = 1, userName = "Guozhijian", a = aArray };
            string s;

            using (StringWriter sw = new StringWriter())
            {
                XmlSerializer xz = new XmlSerializer(info.GetType(),types);
                xz.Serialize(sw, info);
                s = sw.ToString();
            }
            Console.WriteLine(s);
            Console.ReadLine();
        }

[C#基础]关于何时使用XmlSerializer的构造函数(Type, Type[])

标签：xmlserialize   c#   

原文地址：http://blog.csdn.net/lyh916/article/details/45174061