Bind Dropdownlist using Enterpriselibrary 5.0.

Your aspx page like

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title
>
</head>
<
body>
<form id="form1" runat="server">
<div>
City: <asp:DropDownList ID="ddl_city" runat="server">
</asp:DropDownList>
</div>
</form
>
</body>
</
html>

Your .cs file like

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.Common;
using System.Data.SqlClient;
using System.Configuration;
using Microsoft.Practices.EnterpriseLibrary.Common;
using Microsoft.Practices.EnterpriseLibrary.Data;
using Microsoft.Practices.EnterpriseLibrary.Data.Sql;

public partial class _Default : System.Web.UI.Page
{
private string Connectionstring = ConfigurationManager.ConnectionStrings["connection"].ToString();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindCityDropdownlist();

}
}

private void BindCityDropdownlist()
{
DataSet ds = new DataSet();
Database objDB = new SqlDatabase(this.Connectionstring);
string SPName = "Get_CityStateAreaInqSrc";

using (DbCommand objCMD = objDB.GetStoredProcCommand(SPName))
{
objDB.AddInParameter(objCMD, "@Action", DbType.Int64, 2);
try
{
ds = objDB.ExecuteDataSet(objCMD);
}
catch (Exception ex)
{
EventLog objLOG = new EventLog();
objLOG.LogError(ex);
throw ex;
}
}

if (ds != null && ds.Tables[0].Rows.Count > 0)
{
ddl_city.DataSource = ds.Tables[0];
ddl_city.DataTextField = "Name";
ddl_city.DataValueField = "Code";
ddl_city.DataBind();
}
}

}