Controllo personalizzato

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using BasicFrame.WebControls;

namespace controlliWeb
{
    //[DefaultProperty("Text")]
    [ToolboxData("<{0}:formRicerca runat=server></{0}:formRicerca>")]
    public class formRicerca : WebControl
    {
        BasicFrame.WebControls.BasicDatePicker txtDal, txtAl;
        DropDownList ddlNumeroCamere;        
        Label lblDal, lblAl;
        BasicFrame.WebControls.DateDifferenceValidator ddvDal;
        Table tbRicerca;

        protected override void CreateChildControls()
        {
            this.Controls.Clear();

            tbRicerca = new Table();
            tbRicerca.CellPadding = 2;
            tbRicerca.CellSpacing = 2;
            tbRicerca.Width = Unit.Pixel(368);

            TableRow trPeriodo = new TableRow();
            TableCell tdPeriodo = new TableCell();
            tdPeriodo.ColumnSpan = 3;

            lblDal = new Label();
            lblDal.Text = "Dal ";

            lblAl = new Label();
            lblAl.Text = "Al ";     
       
            txtDal = new BasicFrame.WebControls.BasicDatePicker();
            txtDal.TextBoxColumns = 8;
            txtDal.DateFormat = "dd/MM/yyyy";
            txtDal.TextBoxStyle.CssClass = "text_Box";

            txtAl = new BasicFrame.WebControls.BasicDatePicker();
            txtAl.TextBoxColumns = 8;
            txtAl.DateFormat="dd/MM/yyyy";
            txtAl.TextBoxStyle.CssClass = "text_Box";

            ddvDal = new BasicFrame.WebControls.DateDifferenceValidator();
            ddvDal.ErrorMessage = "*";
            ddvDal.ToolTip = "La data inserita dev'essere precedente alla data del campo Al";
            ddvDal.ControlToCompare = "txtAl";
            ddvDal.ControlToValidate = "txtDal";
            ddvDal.Difference = 1;
            ddvDal.Operator = ValidationCompareOperator.GreaterThanEqual;
            ddvDal.ValidationGroup="vgRicerca";

            tdPeriodo.Controls.Add(lblDal);
            tdPeriodo.Controls.Add(txtDal);
            tdPeriodo.Controls.Add(ddvDal);
            tdPeriodo.Controls.Add(lblAl);
            tdPeriodo.Controls.Add(txtAl);
            trPeriodo.Cells.Add(tdPeriodo);
            tbRicerca.Rows.Add(trPeriodo);

            TableRow trIntestazione = new TableRow();
            TableCell tdIntestazione = new TableCell();
            tdIntestazione.Controls.Add(new LiteralControl("n° camere"));
            tdIntestazione.HorizontalAlign = HorizontalAlign.Right;
            trIntestazione.Cells.Add(tdIntestazione);

            tdIntestazione = new TableCell();
            tdIntestazione.Controls.Add(new LiteralControl("adulti"));
            tdIntestazione.HorizontalAlign = HorizontalAlign.Center;
            trIntestazione.Cells.Add(tdIntestazione);

            tdIntestazione = new TableCell();
            tdIntestazione.Controls.Add(new LiteralControl("bambini"));
            tdIntestazione.HorizontalAlign = HorizontalAlign.Center;
            trIntestazione.Cells.Add(tdIntestazione);
            tbRicerca.Rows.Add(trIntestazione);
            
            for(int i=1; i<6; i++)
            {
                TableRow trCamere = new TableRow();                
                TableCell tdCamere = new TableCell();
                if(i==1)
                {
                    ddlNumeroCamere = new DropDownList();
                    ddlNumeroCamere.CssClass = "text_Box";
                    for(int j=1;j<6;j++)
                        ddlNumeroCamere.Items.Add(new ListItem(j.ToString(),j.ToString()));
                    tdCamere.Controls.Add(ddlNumeroCamere);
                }
                else
                {
                    Label lbl = new Label();
                    lbl.Text = "Camera " + i.ToString();                    
                    tdCamere.Controls.Add(lbl);
                }
                trCamere.Cells.Add(tdCamere);

                tdCamere = new TableCell();
                DropDownList ddlAdulti = new DropDownList();
                ddlAdulti.CssClass = "text_Box";
                ddlAdulti.ID = "txtAdulti" + i.ToString();
                for(int k=0;k<11;k++)
                    ddlAdulti.Items.Add(new ListItem(k.ToString(),k.ToString()));
                tdCamere.Controls.Add(ddlAdulti);
                trCamere.Cells.Add(tdCamere);

                tdCamere = new TableCell();
                DropDownList ddlBambini = new DropDownList();
                ddlBambini.CssClass = "text_Box";
                ddlBambini.ID = "txtBambini" + i.ToString();
                for (int h = 0; h < 11; h++)
                    ddlBambini.Items.Add(new ListItem(h.ToString(), h.ToString()));
                tdCamere.Controls.Add(ddlBambini);
                trCamere.Cells.Add(tdCamere);

                tbRicerca.Rows.Add(trCamere);            
            }

            this.Controls.Add(tbRicerca);
        }

        protected override void RenderContents(HtmlTextWriter output)
        {
            tbRicerca.RenderControl(output);
        }

    }
}

 protected override void CreateChildControls()
        {
            base.CreateChildControls();