Default.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

namespace Testing
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                PopulateRolesTable();
            }
        }

        private void PopulateRolesTable()
        {
            Roles.Items.Add(new ListItem("", "0"));
            Roles.Items.Add(new ListItem("Role1", "1"));
            Roles.Items.Add(new ListItem("Role2", "2"));
            Roles.Items.Add(new ListItem("Role3", "3"));
            Roles.Items.Add(new ListItem("Role4", "4"));
            Roles.Items.Add(new ListItem("Role5", "5"));
            Roles.Items.Add(new ListItem("Role6", "6"));

            Roles2.Items.Add(new ListItem("", "0"));
            Roles2.Items.Add(new ListItem("Role1", "1"));
            Roles2.Items.Add(new ListItem("Role2", "2"));
            Roles2.Items.Add(new ListItem("Role3", "3"));
            Roles2.Items.Add(new ListItem("Role4", "4"));
            Roles2.Items.Add(new ListItem("Role5", "5"));
            Roles2.Items.Add(new ListItem("Role6", "6"));
        }

        protected void roles_SelectedIndexChanged(object sender, EventArgs args)
        {
            PnlAuth.Visible = true;
            txtAuthority.Visible = true;

            DataTable table = GetAuthorities();

            Authorities.Items.Clear();
            Authorities.DataSource = table;
            Authorities.DataValueField = "id";
            Authorities.DataTextField = "Authority";
            Authorities.DataEnabledField = "Enabled";
            Authorities.DataCheckedField = "Checked";
            Authorities.DataBind();
        }

        protected void roles2_SelectedIndexChanged(object sender, EventArgs args)
        {
            PnlAuth2.Visible = true;
            txtAuthority2.Visible = true;

            DataTable table = GetAuthorities();

            Authorities2.Items.Clear();
            Authorities2.DataSource = table;
            Authorities2.DataValueField = "id";
            Authorities2.DataTextField = "Authority";
            Authorities2.DataEnabledField = "Enabled";
            Authorities2.DataCheckedField = "Checked";
            Authorities2.DataBind();
        }

        private DataTable GetAuthorities()
        {
            var table = new DataTable();
            table.Columns.Add("id", typeof(int));
            table.Columns.Add("Authority", typeof(string));
            table.Columns.Add("Enabled", typeof(bool));
            table.Columns.Add("Checked", typeof(bool));

            table.Rows.Add(1, "A", true, true);
            table.Rows.Add(2, "B", true, false);
            table.Rows.Add(3, "C", true, false);
            table.Rows.Add(4, "D", true, true);
            table.Rows.Add(5, "E", true, false);
            table.Rows.Add(6, "F", true, false);
            table.Rows.Add(7, "G", true, false);

            return table;
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            LoadPostBackData();
            //save data
            int i = 0;
        }

        private void LoadPostBackData()
        {
            LoadPostBackDataItem(this.Authorities);
        }

        private void LoadPostBackDataItem(EnhancedCheckboxList control)
        {
            string controlId = control.ClientID.Replace("_", "$");
            string postedValue = Request.Params[controlId];

        }
    }
}