using System;
using System.Data;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

namespace Common.system
{

    /// <summary>
    /// 通用XML序列化和反序列化工具类
    /// 创建人：赵耀
    /// 创建时间：2018年11月16日
    /// </summary>
    public static class XmlUtilHelper
    {
        #region 反序列化
        /// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="type">类型</param>
        /// <param name="xml">XML字符串</param>
        /// <returns></returns>
        public static object Deserialize(Type type, string xml)
        {
            try
            {
                using (StringReader sr = new StringReader(xml))
                {
                    XmlSerializer xmldes = new XmlSerializer(type);
                    return xmldes.Deserialize(sr);
                }
            }
            catch (Exception)
            {
                return null;
            }
        }

        /// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="type"></param>
        /// <param name="stream"></param>
        /// <returns></returns>
        public static object Deserialize(Type type, Stream stream)
        {
            XmlSerializer xmldes = new XmlSerializer(type);

            return xmldes.Deserialize(stream);
        }

        /// <summary>
        /// 反序列化实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="strXml"></param>
        /// <returns></returns>
        public static T DeSerializer<T>(string strXml) where T : class
        {
            try
            {
                using (StringReader sr = new StringReader(strXml))
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(T));
                    return serializer.Deserialize(sr) as T;
                }
            }
            catch (Exception)
            {
                return null;
            }
        }

        /// <summary>  
        /// 从xml序列中反序列化  
        /// </summary>
        /// <returns></returns>  
        public static object Deserailize(Type type, string filename)
        {
            try
            {
                object obj;
                if (!System.IO.File.Exists(filename))
                {
                    throw new Exception("指定文件不存在");
                }
                //Xml格式反序列化  
                using (Stream stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
                {
                    XmlSerializer formatter = new XmlSerializer(type);
                    obj = formatter.Deserialize(stream);
                    stream.Close();
                }
                return obj;
            }
            catch (Exception)
            {
                //Logger.Log4NetHelp.Error("反序列化失败:", e);
                return null;
            }
        }

        /// <summary>
        /// 将xml转为Datable
        /// </summary>
        public static DataTable XmlToDataTable(string xmlStr)
        {
            if (!string.IsNullOrEmpty(xmlStr))
            {
                StringReader strStream = null;
                XmlTextReader xmlrdr = null;
                try
                {
                    DataSet ds = new DataSet();
                    //读取字符串中的信息  
                    strStream = new StringReader(xmlStr);
                    //获取StrStream中的数据  
                    xmlrdr = new XmlTextReader(strStream);
                    //ds获取Xmlrdr中的数据                 
                    ds.ReadXml(xmlrdr);
                    return ds.Tables[0];
                }
                catch (Exception)
                {
                    return null;
                }
                finally
                {
                    //释放资源  
                    if (xmlrdr != null)
                    {
                        xmlrdr.Close();
                        strStream.Close();
                        strStream.Dispose();
                    }
                }
            }
            return null;
        }

        #endregion

        #region 序列化
        /// <summary>
        /// 实体类转XML
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string XmlSerialize<T>(T obj)
        {
            using (StringWriter sw = new StringWriter())
            {
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(sw, obj);
                sw.Close();
                return sw.ToString();
            }
        }
        /// <summary>
        /// 序列化
        /// </summary>
        /// <param name="type">类型</param>
        /// <param name="obj">对象</param>
        /// <returns></returns>
        public static string Serializer(Type type, object obj)
        {
            MemoryStream stream = new MemoryStream();
            XmlSerializer xml = new XmlSerializer(type);
            try
            {
                //序列化对象
                xml.Serialize(stream, obj);
            }
            catch (InvalidOperationException)
            {
                //Logger.Log4NetHelp.Error("序列化失败:", ex);
            }
            stream.Position = 0;
            StreamReader sr = new StreamReader(stream);
            string str = sr.ReadToEnd();

            sr.Dispose();
            stream.Dispose();
            return str;
        }

        #endregion
    }
}