[原] 自己实现简单的XML序列化和反序列化

功能比较简单，对自定义类型、List、Array实现了序列化

其中包含了（反射创建数组、反射创建泛型、反射填充泛型内容、反射填充数组内容） 其实我写这段话就是为了让你来的。

    public static class SerializeXmlHelper
    {
        /// 

        /// 序列化一个对象（非列表为XML）
        /// 
        ///  
        ///  
        /// 
        public static XElement SerializeToXml(this object obj, string rootName = null)
        {
            var t = obj.GetType();
            XElement root;
            if (t.IsGenericType)
            {
                root = obj.SerializeListToXml(rootName);
            }
            else if (t.IsArray)
            {
                root = obj.SerializeArrayToXml(rootName);
            }
            else
            {
                root = new XElement(t.Name);
                var ps = t.GetProperties();
                if (ps.Length == 0)
                {
                    root.Value = obj.ToString();
                }
                else
                {
                    foreach (var p in ps)
                    {
                        if (p.PropertyType.BaseType == typeof(object))
                        {
                            var node = new XElement(p.Name, p.GetValue(obj, null));
                            root.Add(node);
                        }
                        else
                            root.Add(p.GetValue(obj, null).SerializeToXml(p.Name));
                    }
                }
            }

            return root;
        }
        /// 

        /// 序列化一个List为xml
        /// 
        ///  
        ///  
        /// 
        public static XElement SerializeListToXml(this object obj, string rootName)
        {
            var root = new XElement(rootName);
            var list = (IEnumerable)obj;
            foreach (var x in list)
            {
                root.Add(x.SerializeToXml(rootName));
            }
            return root;
        }

        /// 

        /// 序列化一个数组为xml
        /// 
        ///  
        ///  
        /// 
        public static XElement SerializeArrayToXml(this object obj, string rootName)
        {
            var root = new XElement(rootName);
            foreach (var o in (Array)obj)
            {
                root.Add(o.SerializeToXml(rootName));
            }
            return root;
        }

        /// 

        /// 反序列xml为一个对象
        /// 
        /// 
        ///  
        /// 
        public static T DeserializeFromXml(this XElement element)
        {
            return (T)DeserializeFromXml(element, typeof(T));
        }

        public static object DeserializeFromXml(this XElement element, Type t)
        {

            //如果是继承，则名字空间必须一致才行。
            if (t.Name != element.Name)
            {
                t = Type.GetType(t.Namespace + "." + element.Name);
                if (t == null) return null;
            }

            var obj = Activator.CreateInstance(t);
            var ps = t.GetProperties();
            foreach (var p in ps)
            {
                var e = element.Element(p.Name);
                if (!e.HasElements)
                {
                    p.SetValue(obj, e.Value, null);
                }
                else
                {
                    if (p.PropertyType.IsArray)
                    {
                        var tmp = DeserializeArrayFromXml(e, p.PropertyType);
                        p.SetValue(obj, tmp, null);
                    }
                    else if (p.PropertyType.IsGenericType)
                    {
                        p.SetValue(obj, DeserializeListFromXml(e, p.PropertyType), null);
                    }
                    else
                    {
                        p.SetValue(obj, e.Value, null);
                    }
                }
            }
            return obj;
        }

        /// 

        /// 反序列化xml为一个数组
        /// 
        ///  
        /// 
        public static T[] DeserializeArrayFromXml(this XContainer element)
        {
            return (T[])DeserializeArrayFromXml(element, typeof(T));
        }

        public static Array DeserializeArrayFromXml(this XContainer element, Type t)
        {
            var elements = element.Elements();
            //创建数组
            var atype = Type.GetType(t.FullName.Replace("[]", ""));
            var array = Array.CreateInstance(atype, elements.Count());

            var i = 0;
            foreach (var e in elements)
            {
                if (e.HasElements)
                {
                    array.SetValue(DeserializeFromXml(e, atype), i);
                }
                else
                {
                    array.SetValue(Convert.ChangeType(e.Value, atype), i);
                }
                i++;
            }
            return array;
        }
        /// 

        /// 反序列化xml为一个泛型ListT
        /// 
        ///  
        /// 
        public static T DeserializeListFromXml(this XContainer element)
        {
            return (T)DeserializeListFromXml(element, typeof(T));
        }
        /// 

        /// 反序列化xml为一个泛型ListT
        /// 
        ///  
        ///  泛型List的类型
        /// 
        public static IEnumerable DeserializeListFromXml(this XContainer element, Type t)
        {
            var elements = element.Elements();

            t = Type.GetType(t.FullName.Replace("IEnumerable", "List"));

            var list = (IEnumerable)Activator.CreateInstance(t);
            var argt = t.GetGenericArguments()[0];
            var add = t.GetMethod("Add", new[] { argt });
            foreach (var e in elements)
            {
                //如果是自定义类型
                if (e.HasElements)
                {
                    add.Invoke(list, new[] { DeserializeFromXml(e, argt) });
                }
                else
                    add.Invoke(list, new[] { Convert.ChangeType(e.Value, argt) });
            }
            return list;

        }
    }

测试代码：

namespace ConsoleApplication2
{
    public class A
    {
        public string Name { get; set; }
    }

    public class Test
    {
        public string Name { get; set; }
        public int[] Arr { get; set; }
        public A[] Arr1 { get; set; }

        public IEnumerable<A> List { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var t = new Test
            {
                Name = "T1",
                Arr = new[] { 1, 2, 3, 4 },
                Arr1 = new [] { new A { Name = "A1" }, new A { Name = "A2" } },
                List = new List<A> { new A { Name = "A1" }, new A { Name = "A2" } }
            };
            var xml = t.SerializeToXml();
            Console.WriteLine(xml);
            var obj = new Test();
            obj.DeserializeFromXml(xml);
            Console.WriteLine(obj.Arr[0]);
            Console.Read();
        }

        public static string XmlSerializer<T>(T serialObject) where T : class
        {
            var ser = new XmlSerializer(serialObject.GetType());
            var mem = new MemoryStream();
            var writer = new XmlTextWriter(mem, Encoding.UTF8);
            ser.Serialize(writer, serialObject);
            writer.Close();

            return Encoding.UTF8.GetString(mem.ToArray());
        }
    }
}

运行结果：