根据字段，字段条件筛选数据 两种方式（string[] ; ArrayList）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using Microsoft.Office.Tools.Excel;
using System.Data.SqlClient;
using System.Collections;


namespace Test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        #region 生成数据源
        private DataSet LoadData()
        {
            try
            {
                DataTable dt = new DataTable();
                dt.Columns.Add("ID", typeof(int));
                dt.Columns.Add("UserName", typeof(string));
                dt.Columns.Add("PassWord", typeof(string));
                DataRow dr = null;

                dr = dt.NewRow();
                dr["UserName"] = "hetao";
                dr["PassWord"] = "hetaoPWD";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["UserName"] = "zhouyu";
                dr["PassWord"] = "zhouyPWD";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["UserName"] = "jianghui";
                dr["PassWord"] = "00";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["UserName"] = "ZhanGuoXin";
                dr["PassWord"] = "00";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["UserName"] = "DingXue";
                dr["PassWord"] = "DX";
                dt.Rows.Add(dr);

                DataSet ds = new DataSet();
                ds.Tables.Add(dt);//dt是你需要添加的DataTable;
                return ds;

            }
            catch (Exception ex)
            {
                MessageBox.Show("生成数据错误" + ex.Message);
                return null;
            }
        }
        #endregion
        #region 显示数据
        private void btnSelectExc_Click(object sender, EventArgs e)
        {
            try
            {
                dataGridView1.DataSource = LoadData().Tables[0];
            }
            catch (Exception ex)
            {
                MessageBox.Show("显示数据Button" + ex.Message);
            }
        }
        #endregion
        /// <summary>
        /// 根据字段和字段的条件，赛选数据[数组存条件]
        /// </summary>
        /// <param name="dt">数据源</param>
        /// <param name="Fields">字段</param>
        /// <param name="pids">查找条件</param>
        /// <returns></returns>
        private DataTable SortTable(DataTable dt,string Fields, string[] pids)
        {
            DataTable dt0 = dt.Clone(); //复制原表结构 
            for (int i = 0; i < pids.Length; i++)
            {
                if (pids[i] != string.Empty)
                {
                    DataRow[] drs = dt.Select(Fields+"='" + pids[i] + "'");
                    if (drs.Length > 0)
                    {
                        foreach (DataRow dr in drs)
                        {
                            dt0.ImportRow(dr); //导入行 
                        }
                    }
                }
            }
            return dt0;
        }



        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                //ArrayList alist = new ArrayList();
                
                string[] str = new string[4];
                str[0] = "00";
                str[1] = "DX";
                dataGridView2.DataSource = SortTable(LoadData().Tables[0], "PassWord", str);
            }
            catch (Exception ex)
            {
                MessageBox.Show("Button"+ex.Message);
            }

        }


        #region 根据字段，字段条件筛选数据[ArrayList存条件]
        /// <summary>
        /// 根据字段，字段条件筛选数据[ArrayList存条件]
        /// </summary>
        /// <param name="dt">数据源</param>
        /// <param name="Fields">字段</param>
        /// <param name="alist">集合存条件</param>
        /// <returns></returns>
        private DataTable SortTable(DataTable dt ,String Fields,ArrayList alist)
        {
            try
            {
                DataTable dt1=null;
                dt1 = dt.Clone();
                if (dt != null && dt.Rows.Count > 0)
                {
                    for(int i =0;i < alist.Count;i++)
                    {
                        if((alist[i]).ToString() != string.Empty)
                        {
                            DataRow[] drs = dt.Select(Fields + "='" + alist[i] + "'");
                            if(drs.Length>0)
                            {
                                foreach (DataRow dr in drs)
                                {
                                    dt1.ImportRow(dr);
                                }
                            }
                        }
                    }
                }
                return dt1;
            }
            catch (Exception ex)
            {
                MessageBox.Show("ArrayList存条件函数"+ex.Message);
                return null;
            }
        }
        #endregion

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                ArrayList alist = new ArrayList();
                alist.Add("00");
                alist.Add("DX");
                dataGridView2.DataSource = SortTable(LoadData().Tables[0], "PassWord", alist);
            }
            catch (Exception ex)
            {
                MessageBox.Show("Button"+ex.Message);
            }

        }

    }
}