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

namespace FangYar.BLL
{
    /// <summary>
    /// DataTable 转 实体类
    /// </summary>
    public class CommomModelBLL
    {
        public List<T> GetModelFromDB<T>(DataTable dt)
        {
            List<T> data = new List<T>();
            foreach (DataRow row in dt.Rows)
            {
                T item = GetItem<T>(row);
                data.Add(item);
            }
            return data;
        }

        /// <summary>
        /// 将DataRow转换成实体对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dr"></param>
        /// <returns></returns>
        private static T GetItem<T>(DataRow dr)
        {
            try
            {
                Type temp = typeof(T);
                T obj = Activator.CreateInstance<T>();
                foreach (DataColumn column in dr.Table.Columns)
                {
                    foreach (PropertyInfo pro in temp.GetProperties())
                    {
                        if (pro.Name.ToLower() == column.ColumnName.ToLower())
                        {
                            if (dr[column.ColumnName] == DBNull.Value)
                            {
                                pro.SetValue(obj, " ", null);
                                break;
                            }
                            else
                            {
                                pro.SetValue(obj, dr[column.ColumnName], null);
                                break;
                            }
                        }
                    }
                }
                return obj;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
    }
}