code/Athena0.0.1/common/Util/DataHelper.cs

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

namespace Athena.common.Util
{
    /// <summary>
    /// 数据源转换
    /// </summary>
    public class DataHelper
    {
        #region IList如何转成List<T>
        /// <summary>
        /// IList如何转成List<T>
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static List<T> IListToList<T>(IList list)
        {
            T[] array = new T[list.Count];
            list.CopyTo(array, 0);
            return new List<T>(array);
        }
        #endregion

        #region DataTable根据条件过滤表的内容
        /// <summary>
        /// 根据条件过滤表的内容
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="condition"></param>
        /// <returns></returns>
        public static DataTable DataFilter(DataTable dt, string condition)
        {
            if (DataHelper.IsExistRows(dt))
            {
                if (condition.Trim() == "")
                {
                    return dt;
                }
                else
                {
                    DataTable newdt = new DataTable();
                    newdt = dt.Clone();
                    DataRow[] dr = dt.Select(condition);
                    for (int i = 0; i < dr.Length; i++)
                    {
                        newdt.ImportRow((DataRow)dr[i]);
                    }
                    return newdt;
                }
            }
            else
            {
                return null;