using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Reflection;

namespace WMS.Common
{
    /// <summary>
    /// 实体类与datatable的转换
    /// </summary>
    public class MelCtData
    {
        private static MelCtData melctData;
       
        private static object _lock = new object();

        #region 通过Singleton模式返回当前实例
        /// <summary>
        /// 通过Singleton模式返回当前实例
        /// </summary>
        public static MelCtData Instance
        {

            get
            {
                if (melctData == null)
                {
                    lock (_lock)
                    {
                        if (melctData == null)
                        {
                            melctData = new MelCtData();
                        }
                    }

                }
                return melctData;
            }
        }

        #endregion

        /// <summary>
        /// 返回datatable相对应的model类
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="table"></param>
        /// <returns></returns> 
        public T FillModel<T>(DataTable table)
        {
            T modelClass = default(T);//关于default为T类型的modelClass赋默认值 
            modelClass = Activator.CreateInstance<T>();
            foreach (DataRow row in table.Rows)
            {
                foreach (DataColumn column in table.Columns)
                {
                    PropertyInfo pi = modelClass.GetType().GetProperty(column.ColumnName);
                    if (pi != null)
                    {
                        if (pi.Name.ToLower() == column.ColumnName.ToLower())
                        {
                            if (row[column.ColumnName] != DBNull.Value)
                                pi.SetValue(modelClass, row[column.ColumnName.ToLower()].ToString(), null);
                            else
                                pi.SetValue(modelClass, null, null);
                        }
                    }
                }
            }
            return modelClass;
        }
    }
}