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

namespace BoYuan.Framework.Uitility
{
    /// <summary>
    ///  xml转换工具类
    /// </summary>
    public class XmlConvert
    {
        /// <summary>
        /// 将实体序列化xml字符串
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string XmlSerialize<T>(T obj)
        {
            if (obj == null) return string.Empty;

            using (StringWriter sw = new StringWriter())
            {
                XmlSerializer serializer = new XmlSerializer(typeof(T));
                serializer.Serialize(sw, obj);
                sw.Close();
                return sw.ToString();
            }
            /*
             //序列化
    string strxml = XmlSerialize<Request>(patientIn);
             */
        }

        /// <summary>
        /// 将xml字符串反序列化成实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="strXML"></param>
        /// <returns></returns>
        public static T XmlDeSerializer<T>(string strXML) where T : class
        {
            try
            {
                using (StringReader sr = new StringReader(strXML.Trim()))
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(T));
                    return serializer.Deserialize(sr) as T;
                }
            }
            catch (Exception ex)
            {
                return null;
            }

            /*
             //反序列化
    Request r = XmlDeSerializer<Request>(strxml);
             */
        }

        /// <summary>
        /// 将xml对象内容字符串转换为DataSet
        /// </summary>
        /// <param name="xmlData"></param>
        /// <returns></returns>
        public static DataSet ConvertXMLToDataSet(string xmlData)
        {
            StringReader stream = null;
            XmlTextReader reader = null;
            try
            {
                DataSet xmlDS = new DataSet();
                stream = new StringReader(xmlData);
                //从stream装载到XmlTextReader
                reader = new XmlTextReader(stream);
                xmlDS.ReadXml(reader);
                return xmlDS;
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (reader != null) reader.Close();
            }
        }

        /// <summary>
        /// 将DataSet转换为xml对象字符串
        /// </summary>
        /// <param name="xmlDS"></param>
        /// <returns></returns>
        public static string ConvertDataSetToXML(DataSet xmlDS)
        {
            MemoryStream stream = null;
            XmlTextWriter writer = null;

            try
            {
                stream = new MemoryStream();
                //从stream装载到XmlTextReader
                writer = new XmlTextWriter(stream, Encoding.Unicode);

                //用WriteXml方法写入文件.
                xmlDS.WriteXml(writer);
                int count = (int)stream.Length;
                byte[] arr = new byte[count];
                stream.Seek(0, SeekOrigin.Begin);
                stream.Read(arr, 0, count);

                UnicodeEncoding utf = new UnicodeEncoding();
                return utf.GetString(arr).Trim();
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (writer != null) writer.Close();
            }
        }

        /// <summary>
        /// 将xml文件转换为DataSet
        /// </summary>
        /// <param name="xmlPath">xml文件路径</param>
        /// <returns></returns>
        public static DataSet ConvertXMLFileToDataSet(string xmlPath)
        {
            StringReader stream = null;
            XmlTextReader reader = null;
            try
            {
                XmlDocument xmld = new XmlDocument();
                xmld.Load(xmlPath);

                DataSet xmlDS = new DataSet();
                stream = new StringReader(xmld.InnerXml);
                //从stream装载到XmlTextReader
                reader = new XmlTextReader(stream);
                xmlDS.ReadXml(reader);
                //xmlDS.ReadXml(xmlFile);
                return xmlDS;
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            finally
            {
                reader?.Close();
            }
        }
        /// <summary>
        /// 将DataSet转换为xml文件
        /// </summary>
        /// <param name="xmlDS"></param>
        /// <param name="xmlPath">xml文件路径</param>
        public static void ConvertDataSetToXMLFile(DataSet xmlDS, string xmlPath)
        {
            MemoryStream stream = null;
            XmlTextWriter writer = null;

            try
            {
                stream = new MemoryStream();
                //从stream装载到XmlTextReader
                writer = new XmlTextWriter(stream, Encoding.Unicode);

                //用WriteXml方法写入文件.
                xmlDS.WriteXml(writer);
                int count = (int)stream.Length;
                byte[] arr = new byte[count];
                stream.Seek(0, SeekOrigin.Begin);
                stream.Read(arr, 0, count);

                //返回Unicode编码的文本
                UnicodeEncoding utf = new UnicodeEncoding();
                StreamWriter sw = new StreamWriter(xmlPath);
                sw.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
                sw.WriteLine(utf.GetString(arr).Trim());
                sw.Close();
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            finally
            {
                writer?.Close();
            }
        }
    }
}
/*
 注意：XML是区分大小写的，节点名称是大写，属性是小写。这是规定，要不没办法解析
 */