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

namespace Utils
{
    public static class XmlUtils
    {
        /// <summary>
        /// 将object转换成xml格式的string
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        public static string Object2XmlString(Object o)
        {
            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = false;
            settings.NewLineHandling = NewLineHandling.None;
            settings.Encoding = Encoding.UTF8;
            settings.OmitXmlDeclaration = true;

            XmlSerializer xs = new XmlSerializer(o.GetType());
            using (StringWriter ws = new StringWriter())
            {
                XmlWriter w = XmlWriter.Create(ws, settings);
                try
                {
                    XmlSerializerNamespaces namespaces = new XmlSerializerNamespaces();
                    namespaces.Add(string.Empty, string.Empty);
                    xs.Serialize(w, o, namespaces);
                    return ws.ToString();
                } finally
                {
                    w.Dispose();
                }
            }
        }

        /// <summary>
        /// 将xml格式的string转换层实体类
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="xmlStr"></param>
        /// <returns></returns>
        public static T XmlString2Object<T>(string xmlStr)
        {
            using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(xmlStr)))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(T));
                return (T)serializer.Deserialize(stream);
            }
        }

        /// <summary>
        /// 将xml格式stream转换层实体类
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="stream"></param>
        /// <returns></returns>
        public static T XmlStream2Object<T>(Stream stream)
        {
            XmlSerializer serializer = new XmlSerializer(typeof(T));
            return (T)serializer.Deserialize(stream);
        }

        /// <summary>
        /// 将xml格式文件转换层实体类
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public static T XmlFile2Object<T>(string fileName)
        {
            using (Stream stream = new FileStream(fileName, FileMode.Open))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(T));
                return (T)serializer.Deserialize(stream);
            }
        }
    }
}