Transfer arguments between modal page and invoker page in asp.net 1.1

/*
 * My msn is: rouser_91@hotmail.com pleasur to discuss with you any question about programming.
 *Any question and recommend feedback to wangran@baosight-hy.com please.
 *Best regards!
 */

namespace Test
{
	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;

	public class list : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.Button Button2;
		protected System.Web.UI.WebControls.ImageButton ImageButton1;
		protected System.Web.UI.WebControls.ImageButton ImageButton2;
		protected System.Web.UI.WebControls.ImageButton ImageButton3;
		protected System.Web.UI.WebControls.ImageButton ImageButton4;
		protected System.Web.UI.WebControls.TextBox TextBox1;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.ImageButton ImageButton5;
		protected System.Web.UI.WebControls.LinkButton LinkButton1;
		protected System.Web.UI.WebControls.DataGrid grd;

		#region Bind Data
		private void BindData()
		{
			//modify the connection string below
			string strConn = "Server=(local);Database=Northwind;Uid=sa;Pwd=xxx";
			string strComm = "Select OrderID,CustomerID,EmployeeID FROM Orders ORDER BY OrderID " + ViewState["ORDERBY"].ToString();
			System.Data.SqlClient.SqlDataAdapter da =
				new System.Data.SqlClient.SqlDataAdapter(strComm,strConn);
			DataTable dt = new DataTable();
			da.Fill(dt);

			grd.DataSource = dt;
			grd.DataBind();

			Label2.Text = " of "+grd.PageCount.ToString()+" pages";
			TextBox1.Text = (grd.CurrentPageIndex+1).ToString();
		}
		#endregion

		#region Web Designer Generated Code
		override protected void OnInit(EventArgs e)
		{
			InitializeComponent();
			base.OnInit(e);
		}
		
		private void InitializeComponent()
		{    
			this.grd.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.grd_PageIndexChanged);
			this.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Button2.Click += new System.EventHandler(this.Button2_Click);
			this.ImageButton4.Click += new System.Web.UI.ImageClickEventHandler(this.ImageButton4_Click);
			this.ImageButton3.Click += new System.Web.UI.ImageClickEventHandler(this.ImageButton3_Click);
			this.ImageButton1.Click += new System.Web.UI.ImageClickEventHandler(this.ImageButton1_Click);
			this.ImageButton2.Click += new System.Web.UI.ImageClickEventHandler(this.ImageButton2_Click);
			this.ImageButton5.Click += new System.Web.UI.ImageClickEventHandler(this.ImageButton5_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		#region events for CheckBox
		public void CheckAll_Checked(object sender,System.EventArgs e)
		{
			CheckBox chk = (CheckBox)(sender);
			foreach(DataGridItem item in grd.Items)
			{
				CheckBox chkItem = (CheckBox)(item.FindControl("CheckItem"));
				chkItem.Checked = chk.Checked;
				CheckItem_Checked(chkItem,e);
			}
		}

		public void CheckItem_Checked(object sender,System.EventArgs e)
		{
			CheckBox chk = (CheckBox)(sender);
			DataGridItem item = (DataGridItem)(chk.Parent.Parent);
			item.BackColor = chk.Checked ? grd.SelectedItemStyle.BackColor : grd.ItemStyle.BackColor;
			item.ForeColor = chk.Checked ? grd.SelectedItemStyle.ForeColor : grd.ItemStyle.ForeColor;
		}
		#endregion

		#region Paging events
		private void grd_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			grd.CurrentPageIndex = e.NewPageIndex;
			BindData();
		}

		private void Button1_Click(object sender, System.EventArgs e)
		{
			string strOrderIds = "";
			foreach(DataGridItem item in grd.Items)
			{
				CheckBox chkItem = (CheckBox)(item.FindControl("CheckItem"));
				if(chkItem.Checked)
					strOrderIds += item.Cells[1].Text + ",";
			}
			if(strOrderIds.Trim() != "")
				strOrderIds = strOrderIds.Substring(0,strOrderIds.Length - 1);
			string strScript = "<script defer> window.returnValue='"+strOrderIds+"'; window.close(); </script>";
			Response.Write(strScript);
		}

		private void ImageButton1_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			grd.CurrentPageIndex = 0;
			BindData();
		}

		private void ImageButton2_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			if(grd.CurrentPageIndex>0)
				grd.CurrentPageIndex --;
			BindData();
		}

		private void ImageButton3_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			if(grd.CurrentPageIndex<grd.PageCount-1)
				grd.CurrentPageIndex ++;
			BindData();
		}

		private void ImageButton4_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			grd.CurrentPageIndex = grd.PageCount-1;
			BindData();
		}

		private void ImageButton5_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			try
			{
				int pageIndex = int.Parse(TextBox1.Text)-1;
				grd.CurrentPageIndex = pageIndex;
				BindData();
			}
			catch(Exception ex)
			{
				//Text is an invalid number
			}
		}
		#endregion

		#region other events

		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!IsPostBack)
			{
				string strScript = "<script defer> if(window.dialogArguments!=null) __doPostBack('',window.dialogArguments); </script>";
				if(!this.IsClientScriptBlockRegistered("GetArgumentScript"))
					this.RegisterStartupScript("GetArgumentScript",strScript);
			}
			else
			{
				if(ViewState["ORDERBY"] == null)
				{
					ViewState["ORDERBY"] = Request["__EVENTARGUMENT"];
					BindData();
				}
			}
		}
		
		private void Button2_Click(object sender, System.EventArgs e)
		{
			Response.Write("<script defer> window.close(); </script>");
		}
		#endregion
	}
}