Creating Handler for Dynamic DropDownList

[DotNetJunkies User]

Hie,
I create a dynamique HtmlTable, in each cell of this HtmlTable put a new control ( dropdownlist,label,..) and then want to create handler so that if i change the select item in the dop downlist i change the text displayed in the label in the same row.
hier is my code:

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 gestion_commerciale
{
/// <summary>
/// Description résumée de [!output SAFE_CLASS_NAME].
/// </summary>
public class bon : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label xnumbon;
protected System.Web.UI.WebControls.Label xcompte;
protected System.Web.UI.WebControls.Label xdate;
protected System.Web.UI.WebControls.Label xcode;
protected System.Web.UI.WebControls.DropDownList xclient;
protected System.Web.UI.WebControls.TextBox xnbre;
protected System.Web.UI.HtmlControls.HtmlTable Table1;

private void Page_Load(object sender, System.EventArgs e)
{
if (!IsPostBack )
{
string sql_cl= "SELECT nom_client FROM client order by nom_client asc";
NumBon numero_bon = new NumBon();

xnumbon.Text = numero_bon.getNumBon().ToString();

xcompte.Text= Session["compte"].ToString();
DataBase db= new DataBase();
db.setDbConnection();
db.getDbConnection().Open();
RecordSet rs = new RecordSet(sql_cl,db.getDbConnection());
xclient.DataSource = rs.execSelect();
xclient.DataTextField = "nom_client";
xclient.DataBind();

}

}

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGENÂ*: Cet appel est requis par le Concepteur Web Form ASP.NET.
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// Méthode requise pour la prise en charge du concepteur - ne modifiez pas
/// le contenu de cette méthode avec l'éditeur de code.
/// </summary>
private void InitializeComponent()
{
this.xnbre.TextChanged += new System.EventHandler(this.xnbre_TextChanged);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void xnbre_TextChanged(object sender, System.EventArgs e)
{

int numrows = Convert.ToInt32 (xnbre.Text);
// boucle selon le nombre de produit

// get the number of rows and cells to build

// loop through the given number of rows
for ( int r = 0; r < numrows; r++ )
{
// instantiate a new row
HtmlTableRow row = new HtmlTableRow ( );

// set bgcolor for alternating rows
if ( r % 2 == 1 ) row.BgColor = "beige";

// loop through the given number of cells
for ( int c = 0; c < 8; c++ )
{
// instantiate a new cell
HtmlTableCell cell = new HtmlTableCell ( );

// add cell content
if(c==4)
{

DropDownList stationDifusion = new DropDownList();
stationDifusion.ID="st"+r+"";
//stationDifusion.SelectedIndexChanged += new System.EventHandler(this.stationDifusion_SelectedI ndexChanged);//
stationDifusion.Width=100;
//creation d'un array liste
ArrayList station=new ArrayList( );
station.Add("Télévision");
station.Add("Radio RSI");
station.Add("Chaîne Nationale");
station.Add("Dakar FM" );
station.Add("St Louis FM");
station.Add("Louga FM");
station.Add("Thies FM");
station.Add("Kaolack FM");
station.Add("Diourbel FM");
station.Add("Kolda FM");
station.Add("Ziguinchor FM");
station.Add("Tamba FM");
station.Add("Fatick FM");
station.Add("Synchronisation");
stationDifusion.DataSource=station;// fin array liste
stationDifusion.DataBind();
cell.Controls.Add (stationDifusion);
}
else if (c==2)
{
DropDownList ddl = new DropDownList();
ddl.ID="hd"+r+"";
ddl.Width=100;
//creation d'un array liste
ArrayList heuredifusion=new ArrayList ( );
heuredifusion.Add ( "12h:30" );
heuredifusion.Add ( "13h:00" );
heuredifusion.Add ( "14h:00" );
heuredifusion.Add ( "14h:15" );
heuredifusion.Add ( "15h:00" );
heuredifusion.Add ( "17h:00" );
heuredifusion.Add ( "19h:30" );
heuredifusion.Add ( "20h:00" );
heuredifusion.Add ( "20h:30" );
heuredifusion.Add ( "21h:00" );
heuredifusion.Add ( "23h:30" );
heuredifusion.Add ( "23h:45" );
ddl.DataSource=heuredifusion;// fn array liste
ddl.DataBind();
cell.Controls.Add (ddl);

}
else if (c==6)
{
DropDownList ddl = new DropDownList();
DropDownList ddlHeureDifusion = new DropDownList();
ddlHeureDifusion.ID="maj"+r+"";
ddlHeureDifusion.Width=100;
//creation d'un array liste
ArrayList majoration=new ArrayList ( );
majoration.Add ( "0" );
majoration.Add ( "5" );
majoration.Add ( "10" );
majoration.Add ( "15" );
majoration.Add ( "20" );
majoration.Add ( "25" );
majoration.Add ( "30" );
majoration.Add ( "35" );
majoration.Add ("40" );
majoration.Add ( "45" );
majoration.Add ( "50" );
majoration.Add ( "55" );
majoration.Add ( "60" );
majoration.Add ( "65" );
majoration.Add ( "70" );
majoration.Add ( "75" );
majoration.Add ( "80" );
majoration.Add ( "85" );
majoration.Add ( "90" );
majoration.Add ( "95" );
majoration.Add ( "100" );
ddl.DataSource = majoration;// fin array liste
ddl.DataBind();
cell.Controls.Add (ddl);
}
else if(c==0)
{
string sql_query="select nom_prod,pu from produit order by nom_prod asc";
//cell.Controls.Add ( new HtmlInputText());

DropDownList ddlDesi = new DropDownList();
DropDownList ddlPU = new DropDownList();
//************************************************** *
DataBase db= new DataBase();
db.setDbConnection();
db.getDbConnection().Open();
RecordSet rs = new RecordSet(sql_query,db.getDbConnection());
ddlDesi.DataSource = rs.execSelect();
ddlDesi.DataTextField = "nom_prod";
ddlDesi.DataBind();
cell.Controls.Add (ddlDesi);
}
else if(c==1)
{
HtmlInputText itnom=new HtmlInputText();
itnom.Size=10;
cell.Controls.Add(itnom);
}
else if(c==3)
{
HtmlInputText itqte=new HtmlInputText();
itqte.Size=2;

cell.Controls.Add(itqte);
}

// add the cell to the Cells collection
row.Cells.Add ( cell );
}
// add the row to the Rows collection
Table1.Rows.Add(row);
}
}
}
}
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