水晶报表加载缓慢

内容：
根据条件查询数据，在DataGridView里面显示对应信息，然后点击每行信息，在下面CrystalReportViewer显示对应报表
现在已经实现报表的对应加载！
数据源是dateset数据集，数据来源是SQL Server中同一数据库下多个表
但问题就在于，第一次加载相当缓慢，将近花费17、18秒左右
现在想请问一下，是我SQL 语句的问题？！还是存在其他问题。
若有问题怎么修改﹏﹏
以及怎么实现预加载？!
我比较小白﹏﹏希望能解说详细点﹏﹏%>_<%
code：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;

namespace yyynwl
{
    public partial class f_tlddy : Form
    {
        public f_tlddy()
        {
            InitializeComponent();
        }

        private void BTNcx_Click(object sender, EventArgs e)
        {

            string tmpsql = "select e.id ,e.yfid ,b.mc ,e.ksid ,e.zzrdm ,e.zzrxm ,e.zzsj ,e.dyrdm ,e.dyrxm ,e.dysj ,e.dycs ,e.zhdysj from ejyf_tld e with(nolock),bmml b with(nolock) where e.yfid=b.id";//对应DataGridView中字段

//查询
            if (CBksmc.Text != "")
            {
                tmpsql += " and e.ksid=" + CBksmc.Text.Trim();
            }

            if (Lyfmc.Text != "")
            {
                tmpsql += " and b.mc='" + Lyfmc.Text.ToString().Trim() +"'";
            }

            if (wdy.Checked == true)
            {
                tmpsql += " and e.dycs is  null or e.dycs = 0";
            }
            else
            {
                tmpsql += " and e.dycs>0";
                tmpsql += " and e.dysj between '"+dtp1.Text.ToString().Trim ()+"' and '"+dtp2.Text.ToString().Trim ()+"'";

                if (tdyr.Text  != "")
                {
                    tmpsql += " and e.dyrxm+e.dyrdm like '%" + tdyr.Text.ToString().ToUpper().Trim() + "%'";
                }
                if (tlsh.Text != "")
                {
                    tmpsql += " and e.id like '%" + tlsh.Text.ToString().ToUpper().Trim() + "%'";
                }
            }
            DGVtld.DataSource = c_svisit.getds(tmpsql).Tables[0];
        }

        private void f_tlddy_Shown(object sender, EventArgs e)
        {
            try
            {
                string tmpsql = "select null as ksid,null as mc union select distinct ksid,b.mc from ejyf_tld e with(nolock),bmml b with(nolock) where e.yfid = b.id";
                CBksmc.DataSource = c_svisit.getds(tmpsql).Tables[0];
                CBksmc.DisplayMember = "ksid";
                CBksmc.ValueMember = "ksid";
                Lyfmc.DataSource = c_svisit.getds(tmpsql).Tables[0];
                Lyfmc.DisplayMember = "mc";
                Lyfmc.ValueMember = "mc";
            }
            catch { MessageBox.Show("数据库连接错误"); }
        }

//单选条件
        private void ydy_CheckedChanged(object sender, EventArgs e)
        {
            if (ydy.Checked == true)
            {
                this.panel6.Enabled = true;
            }
        }
        private void wdy_CheckedChanged(object sender, EventArgs e)
        {
            if (wdy.Checked == true)
            {
                this.panel6.Enabled = false;
            }
        }

//加载报表

        private void DGVtld_SelectionChanged(object sender, EventArgs e)
        {

            int id = Convert.ToInt16(this.DGVtld[0, this.DGVtld.CurrentCell.RowIndex].Value);

            ds ds1 = new ds();
            c_svisit.getsda("select e.* , b.mc,p.yjph ,p.yjxq from ejyf_tld_pz e,bmml b,ejyf_tld_pzphmx p where e.yfid = b.id and p.tldid = e.tldid and p.spid =e.spid and e.tldid =" + id + " ").Fill(ds1, "ejyf_tld_pz");
            ReportDocument rd = new ReportDocument();
            rd.Load("ejyf_tld_pz.rpt");
            rd.SetDataSource(ds1);
            crystalRV.ReportSource = rd;
        }
    }
}
--------------------编程问答-------------------- 不敢用這個

我用這個旗艦版

http://www.stimulsoft.com/Home.aspx --------------------编程问答-------------------- 没人回答……不过问题已经解决……用了线程……提前加载！！！舍不得我的分啊！！！

补充：.NET技术 ,  图表区