C#工具类之Xml序列化扩展类

using System;
using System.IO;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using System.Xml.Serialization;

/// <summary>
    /// Xml序列化
    /// </summary>
    public static class XmlSerializerHelper
    {
        /// <summary>
        /// 将对象序列化为Xml
        /// </summary>
        /// <typeparam name="T">对象实例对应的类.T的修饰符应当为Public</typeparam>
        /// <param name="obj">对象实例</param>
        /// <returns>序列化后的字符串</returns>
        public static string ToXml<T>(this T obj)
        {
            if (obj == null) throw new NullReferenceException();

            XmlSerializer serializer = new XmlSerializer(typeof(T));

            using (StringWriter writer = new StringWriter())
            {
                serializer.Serialize(writer, obj);
                return writer.ToString();
            }
        }

        /// <summary>
        /// 反序列化
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="xmlDocument"></param>
        /// <returns></returns>
        public static T ToInstanceFromXml<T>(this string xmlDocument)
        {
            using (StringReader reader = new StringReader(xmlDocument))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(T));
                var obj = serializer.Deserialize(reader);
                if (obj is T)
                {
                    return (T)obj;
                }

                return default(T);
            }
        }

        /// <summary>
        /// 将对象序列化为Xml
        /// </summary>
        /// <param name="obj">对象实例</param>
        /// <returns>序列化后的字符串</returns>
        public static string ToXml(this object obj)
        {
            return ToXml(obj, Encoding.UTF8);
        }

        /// <summary>
        /// 将对象序列化为Xml
        /// </summary>
        /// <param name="obj">对象实例</param>
        /// <param name="encoding">编码格式</param>
        /// <returns>序列化后的字符串</returns>
        public static string ToXml(this object obj, Encoding encoding)
        {
            if (obj == null)
            {
                throw new ArgumentException("对象实例不能为空");
            }

            if (encoding == null)
            {
                throw new Exception("编码不能为空");
            }

            using (var stream = new MemoryStream())
            {
                var serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(stream, obj);
                stream.Position = 0;
                return encoding.GetString(stream.ToArray());
            }
        }

    }