using System;
using System.Collections;
using System.Text;
using System.Data;
using System.Collections;

namespace MyConverter
{
    class Converters
    {
        public static DataTable ToDataTable(ArrayList alist) 
        {  DataTable dt = new DataTable();
            
           if (alist[0] == null)
            throw new FormatException("Parameter ArrayList empty");
            dt.TableName = alist[0].GetType().Name;
            DataRow dr;
            System.Reflection.PropertyInfo [] propInfo =alist[0].GetType().GetProperties();
            for(int i=0; i< propInfo.Length;i++)
            {                
                dt.Columns.Add(propInfo[i].Name, propInfo[i].PropertyType);
            }

            for(int row =0;row < alist.Count ; row++)
            {
                dr = dt.NewRow();
                for (int i=0;i< propInfo.Length;i++)
                {
                    object tempObject =alist[row];

                    object t = propInfo[i].GetValue(tempObject, null);
                    /*object t =tempObject.GetType().InvokeMember(propInfo[i].Name,
                             R.BindingFlags.GetProperty , null,tempObject , new object [] {});*/
                    if (t!=null)
                    dr[i] = t.ToString(); 
                }
            dt.Rows.Add(dr);
            } 
            return dt;
        }

        public static DataTable ToDataTable(ArrayList alist, ArrayList alColNames)
        {
            DataTable dt = new DataTable();

            if (alist[0] == null)
                throw new FormatException("Parameter ArrayList empty");
            dt.TableName = alist[0].GetType().Name;
            DataRow dr;
            System.Reflection.PropertyInfo[] propInfo = alist[0].GetType().GetProperties();
            for (int i = 0; i < propInfo.Length; i++)
            {
                for (int j = 0; j < alColNames.Count; j++)
                {
                    if (alColNames[j].ToString() == propInfo[i].Name)
                    {
                        dt.Columns.Add(propInfo[i].Name, propInfo[i].PropertyType);
                        break;
                    }
                }                
            }

            for (int row = 0; row < alist.Count; row++)
            {
                dr = dt.NewRow();
                for (int i = 0; i < dt.Columns.Count; i++)
                {
                    object tempObject = alist[row];

                    object t = propInfo[i].GetValue(tempObject, null);
                    /*object t =tempObject.GetType().InvokeMember(propInfo[i].Name,
                             R.BindingFlags.GetProperty , null,tempObject , new object [] {});*/
                    if (t != null)
                        dr[i] = t.ToString();
                }
                dt.Rows.Add(dr);
            }
            return dt;
        }
    }
}