我想实现在第一个页面里选择查询条件，然后通过第二个页面的DataGrid返回符合条件的数据（使用Northwind数据库中SQL中的Order Details表）。但不成功 :(不知为什么，但我怀疑是参数没有传递到DataGrid中去，能否帮忙看一下代码是哪有问题？谢谢
代码如下：
（查询页的）
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

namespace Examp05.Ex05_01
{
    /// <summary>
    /// Ex05_11 的摘要说明。
    /// </summary>
    public class Ex05_11 : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.Label Label1;
        protected System.Web.UI.WebControls.DropDownList dl1;
        protected System.Web.UI.WebControls.DropDownList dl2;
        protected System.Web.UI.WebControls.TextBox tx;
        protected System.Web.UI.WebControls.RadioButton RadioButton1;
        protected System.Web.UI.WebControls.RadioButton RadioButton2;
        protected System.Web.UI.WebControls.Button Button1;
        protected System.Web.UI.WebControls.Button Button2;
        protected System.Web.UI.WebControls.ListBox ListBox1;
        protected System.Web.UI.WebControls.CheckBoxList CheckBoxList1;
        protected System.Web.UI.WebControls.Button Button3;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            if(!IsPostBack)
            {
                try
                {
                    DataSet ds=new DataSet();
                    string str="server=localhost;uid=sa;pwd=;database=Northwind";
                    SqlConnection conn=new SqlConnection(str);
                    string command="select name from sysColumns where id=325576198 order by colid";
                    SqlDataAdapter da=new SqlDataAdapter(command,conn);
                    da.Fill(ds,"ta");
                    CheckBoxList1.DataSource=ds.Tables["ta"].DefaultView;
                    CheckBoxList1.DatavalueField=ds.Tables["ta"].Columns[0].ColumnName;
                    CheckBoxList1.DataTextField=ds.Tables["ta"].Columns[0].ColumnName;
                    CheckBoxList1.DataBind();
                    CheckBoxList1.RepeatDirection=RepeatDirection.Horizontal;
                    dl1.DataSource=ds.Tables["ta"].DefaultView;
                    dl1.DatavalueField=ds.Tables["ta"].Columns[0].ColumnName;
                    dl1.DataTextField=ds.Tables["ta"].Columns[0].ColumnName;
                    dl1.DataBind();
                }
                catch
                {
                    Response.Write("<script language=javascript>alert('连接失败！')</script>");
                }

            }
                    
        }

        #region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.Button1.Click += new System.EventHandler(this.Button1_Click);
            this.Button2.Click += new System.EventHandler(this.Button2_Click);
            this.Button3.Click += new System.EventHandler(this.Button3_Click);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

        private void Button1_Click(object sender, System.EventArgs e)
        {
            string qu;
            string qu1="";
            string qu2;
            if(RadioButton1.Checked==true)
            {
                qu1=""+RadioButton1.Text.ToString()+"";
            }
            if(RadioButton2.Checked==true)
            {
                qu1=""+RadioButton1.Text.ToString()+"";
            }
            qu2=dl1.SelectedItem.Text.ToString()+dl2.SelectedItem.Text.ToString()+tx.Text.ToString();
            if(ListBox1.Items.Count==0)
            {
                qu=qu2;
            }
            else
            {
                qu=qu1+qu2;
            }
            ListBox1.Items.Add(qu);
        }

        private void Button2_Click(object sender, System.EventArgs e)
        {
            if(ListBox1.Items.Count!=0)
            {
                if(ListBox1.SelectedIndex>-1)
                {
                    ListBox1.Items.Remove(ListBox1.SelectedItem);
                }
                else
                {
                    Response.Write("<script language=javascript>alert('没有选中列表项！')</script>");
                }
            }
        }

        private void Button3_Click(object sender, System.EventArgs e)
        {
            string tq="";
            string shc="";
            if(ListBox1.Items.Count==0)
            {
                Response.Write("<script language=javascript>alert<'请选择查询条件！'></script>");
            }
            for(int i=0;i<ListBox1.Items.Count;i++)
            {
                if(ListBox1.Items[0].Text.StartsWith("and"))
                {
                    ListBox1.Items[0].Text=ListBox1.Items[0].Text.Substring(5);
                }
                if(ListBox1.Items[0].Text.StartsWith("or"))
                {
                    ListBox1.Items[0].Text=ListBox1.Items[0].Text.Substring(4);
                }
                tq+=ListBox1.Items[i].Text.ToString();
            }
            if(CheckBoxList1.SelectedIndex>-1)
            {
                for(int j=0;j<CheckBoxList1.Items.Count;j++)
                {
                    if(CheckBoxList1.Items[j].Selected==true)
                    {
                        shc+=CheckBoxList1.Items[j].Text.ToString()+",";
                    }
                }
            }

            else
            {
                Response.Write("<script language=javascript>alert('请选择要显示的字段名称！')</script>");
            }
            shc=" "+shc.TrimEnd(',')+" ";
            Response.Redirect("Ex05_12.aspx?shc="+shc+"&tq="+tq);
        }
        
        

        }

        
    
}







（DataGrid页的）
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

namespace Examp05.Ex05_01
{
    /// <summary>
    /// Ex05_12 的摘要说明。
    /// </summary>
    public class Ex05_12 : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.Label Label1;
        protected System.Web.UI.WebControls.DataGrid DataGrid1;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            string showCols=Request["shc"];
            string tq=Request["tq"];
            Label1.Text="查询结果"+tq;
            DataSet ds=new DataSet();
            SqlConnection conn=new SqlConnection("server=localhost;uid=sa;pwd=;database=Northwind");
            string command="select"+showCols+"from [Order Details] where" +tq;
            SqlDataAdapter da=new SqlDataAdapter(command,conn);
            da.Fill(ds,"ta1");
            if(ds.Tables["ta1"].Rows.Count!=0)
            {
                DataGrid1.DataSource=ds.Tables["ta1"].DefaultView;
                DataGrid1.DataBind();
            }
            else
            {
                Label1.Text="没有符合查询条件的数据！";
            }

        }

        #region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion
    }
}

SqlConnection conn=new SqlConnection("server=localhost;uid=sa;pwd=;database=Northwind";
string command="select"+showCols+"from [Order Details] where" +tq;
SqlDataAdapter da=new SqlDataAdapter(command,conn);
第二段代码里面有呀，不知这样对么？
还有第一段最后的这段
shc=" "+shc.TrimEnd(',')+" ";
Response.Redirect("Ex05_12.aspx?shc="+shc+"&tq="+tq);
不知这样写对么？这样就能从第一个页面把参数传到第二页么？我的错误提示说where附近有错误，我找不到，是不是传递过程中有什么参数错了？请指点！谢谢！

我先试试，不行再说，谢谢！