RM.Common/DotNetData/DataTableHelper.cs

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using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Reflection;
using System.Text;
using System.Xml;
using System.Xml.Serialization;

namespace RM.Common.DotNetData
{
    public class DataTableHelper
    {
        public static Hashtable DataTableToHashtableByKeyValue(DataTable dt, string keyField, string valFiled)
        {
            Hashtable ht = new Hashtable();
            if (dt != null)
            {
                foreach (DataRow dr in dt.Rows)
                {
                    string key = dr[keyField].ToString();
                    ht[key] = dr[valFiled];
                }
            }
            return ht;
        }

        public static string DataTableToXML(DataTable dt)
        {
            string result;
            if (dt != null)
            {
                StringBuilder sb = new StringBuilder();
                XmlWriter writer = XmlWriter.Create(sb);
                XmlSerializer serializer = new XmlSerializer(typeof(DataTable));
                serializer.Serialize(writer, dt);
                writer.Close();
                result = sb.ToString();
            }
            else
            {
                result = string.Empty;
            }
            return result;
        }

        public static IList<Hashtable> DataTableToArrayList(DataTable dt)
        {
            IList<Hashtable> result;
            if (dt == null)
            {
                result = new List<Hashtable>();
            }
            else
            {
                IList<Hashtable> datas = new List<Hashtable>();
                foreach (DataRow dr in dt.Rows)
                {
                    Hashtable ht = DataTableHelper.DataRowToHashTable(dr);
                    datas.Add(ht);