多个不同的表合并到一个datatable中，repeater在绑定datatable

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
namespace LZserverList
{
    public partial class LZList : System.Web.UI.Page
    {
        SqlConnection conn = new SqlConnection("server=.;database=ShifanRoadLZ0818;uid=sa;pwd=123456;");
        //处罚表查询
        string sqlcf = @"select  DJB_CF.CaseDistrict, DJB_CF.CaseYear,DJB_CF.CaseMonth, DJB_CF.CaseMoney,DJB_CF.TreeType  from DJB_CF";
        //赔补偿表查询
        string sqlpbc = @"select  DJB_PBC.CaseDistrict,DJB_PBC.CaseYear,DJB_PBC.CaseMonth, DJB_PBC.CaseMoney,DJB_PBC.TreeType  from DJB_PBC";
        //强制表查询
        string sqlqz = @"select  DJB_QZ.CaseDistrict,DJB_QZ.CaseYear,DJB_QZ.CaseMonth, DJB_QZ.CaseMoney,DJB_QZ.TreeType  from DJB_QZ";
        //许可表查询
        string sqlxk = @"select  DJB_XK.CaseDistrict as cd,DJB_XK.CaseYear as cy,DJB_XK.CaseMonth as cm, DJB_XK.CaseMoney as cmy,DJB_XK.XKType as ct  from DJB_XK";
     
        protected void Page_Load(object sender, EventArgs e)
        {
            Bind();
        }
        //绑定repeater
        public void Bind()
        {
            //string Month = "";
            //string Year = "";
            retdf.DataSource = DataTablelist();
            retdf.DataBind();
        }
        //处罚表
        public DataTable tablecf()
        {
            SqlDataAdapter sda = new SqlDataAdapter(sqlcf, conn);
            DataTable dt = new DataTable();
            sda.Fill(dt);
            dt.Dispose();
            return dt;
        }
        //赔补偿表
        public DataTable tablepbc()
        {
            SqlDataAdapter sda = new SqlDataAdapter(sqlpbc, conn);
            DataTable dt = new DataTable();
            sda.Fill(dt);
            dt.Dispose();
            return dt;
        }
        //强制表
        public DataTable tableqz()
        {
            SqlDataAdapter sda = new SqlDataAdapter(sqlqz, conn);
            DataTable dt = new DataTable();
            sda.Fill(dt);
            dt.Dispose();
            return dt;
        }
        //许可表
        public DataTable tablexk()
        {
            SqlDataAdapter sda = new SqlDataAdapter(sqlxk, conn);
            DataTable dt = new DataTable();
            sda.Fill(dt);
            dt.Dispose();
            return dt;
        }
        //三个相同的表集合在一个表中
        public DataTable table3list()
        {
            DataTable cf = (DataTable)tablecf();

DataTable newDataTable = cf.Clone();
            object[] obj = new object[newDataTable.Columns.Count];
            //添加处罚表的数据     
            for (int i = 0; i < cf.Rows.Count; i++)
            {
                cf.Rows[i].ItemArray.CopyTo(obj, 0);
                newDataTable.Rows.Add(obj);
            }
            //添加赔补偿表的数据 
            DataTable  pbc = (DataTable)tablepbc();
            for (int i = 0; i < pbc.Rows.Count; i++)
            {
                pbc.Rows[i].ItemArray.CopyTo(obj, 0);
                newDataTable.Rows.Add(obj);
            }

//添加强制表的数据  
            DataTable qz = (DataTable)tableqz();
            for (int i = 0; i < qz.Rows.Count; i++)
            {
                qz.Rows[i].ItemArray.CopyTo(obj, 0);
                newDataTable.Rows.Add(obj);
            }
            return newDataTable;
        }
        /// <summary>
        /// 将两个列不同(结构不同)的DataTable合并成一个新的DataTable
        /// </summary>
        /// <param name="DataTable1">表1</param>
        /// <param name="DataTable2">表2</param>
        /// <param name="DTName">合并后新的表名</param>
        /// <returns>合并后的新表</returns>
        public DataTable DataTablelist()
        {
            string DTName = "";
            DataTable list3 = (DataTable)table3list();
            DataTable xk = (DataTable)tablexk();

//克隆DataTable1的结构          
            DataTable newDataTable = list3.Clone();
            for (int i = 0; i < xk.Columns.Count; i++)
            {
                //再向新表中加入DataTable2的列结构   
                newDataTable.Columns.Add(xk.Columns[i].ColumnName);
            }
            object[] obj = new object[newDataTable.Columns.Count];
            //添加DataTable1的数据    
            for (int i = 0; i < list3.Rows.Count; i++)
            {
                list3.Rows[i].ItemArray.CopyTo(obj, 0);
                newDataTable.Rows.Add(obj);
            }
            if (list3.Rows.Count >= xk.Rows.Count)
            {
                for (int i = 0; i < xk.Rows.Count; i++)
                {
                    for (int j = 0; j < xk.Columns.Count; j++)
                    {
                        newDataTable.Rows[i][j + list3.Columns.Count] = xk.Rows[i][j].ToString();
                    }
                }
            }
            else
            {
                DataRow dr3;
                //向新表中添加多出的几行     
                for (int i = 0; i < xk.Rows.Count - list3.Rows.Count; i++)
                {
                    dr3 = newDataTable.NewRow();
                    newDataTable.Rows.Add(dr3);
                }
                for (int i = 0; i < xk.Rows.Count; i++)
                {
                    for (int j = 0; j < xk.Columns.Count; j++)
                    {
                        newDataTable.Rows[i][j + list3.Columns.Count] = xk.Rows[i][j].ToString();
                    }
                }
            }
            newDataTable.TableName = DTName; //设置DT的名字  
            return newDataTable;
        }

}

}