As Model is returning empty in the controller. How to load the model in controller?

DbContext

        #region RolePermissionCheck
        public List<RolePermission> GetRolepermission(int id)
        {
            connection();
            List<SampleWebApplication.Models.RolePermission> rolepermissions = new List<SampleWebApplication.Models.RolePermission>();
            SqlCommand cmd = new SqlCommand("GetRolePermission", con);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@Roleid", id);
           
            SqlDataAdapter sd = new SqlDataAdapter(cmd);
            DataTable dt = new DataTable();
            con.Open();
            sd.Fill(dt);
            con.Close();
            foreach (DataRow dr in dt.Rows)
            {
                role.Add(new RolePermission
                    { 
                        Roleperid = Convert.ToInt32(dr["Roleperid"]),
                        Roleid = Convert.ToInt32(dr["Roleid"]),
                        ControllerName = Convert.ToString(dr["ControlerName"]),
                        Roles = Convert.ToString(dr["Roles"]),
                        ViewDet = Convert.ToBoolean(dr["ViewDet"]),
                        AddDet = Convert.ToBoolean(dr["AddDet"]),
                        EditDet = Convert.ToBoolean(dr["EditDet"]),
                        DelDet = Convert.ToBoolean(dr["DelDet"])
                    });
            }
            return role;
        }

Controller

        public ActionResult Index(int id, RolePermission smodel)
        {
            try
            {
                DbContext sdb = new DbContext();
                sdb.UpdateDetails(smodel, id);
                DbContext dbhandle = new DbContext();
                RolePermission role = new RolePermission();
                //ModelState.Clear();
                return View(dbhandle.GetRolepermission(id));
                //return View();
                //  return RedirectToAction("Index");
            }
            catch(Exception ex)
            {
                return View();
            }
        } 
 
        public ActionResult Index()
        {
            int id;
            id = (int)Session["Roleid"];
            DbContext dbhandle = new DbContext(); 
           
            return View(dbhandle.GetRolepermission(id)); 
        }
 
        public class RolePermission
        { 
            //[Table("RolePermission")] 
            [Key]
            public int Roleperid { get; set; }
            public int Roleid { get; set; }
            public string ControllerName { get; set; } 
            public string Roles { get; set; }
            public bool ViewDet { get; set; }
            public bool AddDet { get; set; }
            public bool EditDet { get; set; }
            public bool DelDet { get; set; }
            public DbSet<RolePermission> RolePermissions
            {
                get;
                set;
            } 
        }

@model IEnumerable<SampleWebApplication.Models.RolePermission>

@using (Html.BeginForm())
{
    <p>@Html.ActionLink("Create New", "Create")</p>
    <table class="table">
        <tr>
            <th>@Html.DisplayNameFor(model => model.Roleid)</th>
            <th>@Html.DisplayNameFor(model => model.ControllerName)</th>
            <th>@Html.DisplayNameFor(model => model.Roles)</th>
            <th>@Html.DisplayNameFor(model => model.ViewDet)</th>
            <th>@Html.DisplayNameFor(model => model.AddDet)</th>
            <th>@Html.DisplayNameFor(model => model.EditDet)</th>
            <th>@Html.DisplayNameFor(model => model.DelDet)</th>
            <th></th>
        </tr>
 
        @foreach (var item in Model)
        {
            <tr>
                <td>@Html.DisplayFor(modelItem => item.Roleid)</td>
                <td>@Html.DisplayFor(modelItem => item.ControllerName)</td>
                <td><input type="checkbox" value="@item.ViewDet" checked="@item.ViewDet" name="EditDet" /></td>
                <td><input type="checkbox" value="@item.AddDet" checked="@item.AddDet" name="EditDet" /></td>
                <td><input type="checkbox" value="@item.EditDet" checked="@item.EditDet" name="EditDet" /></td>
                <td><input type="checkbox" value="@item.DelDet" checked="@item.DelDet" name="DelDet" /></td>
                <td>
                    @Html.ActionLink("Details", "Details", new { id = item.Roleperid }) |
                    @Html.ActionLink("Delete", "Delete", new { id = item.Roleperid })*@
                </td>
            </tr>
            <tr>
                @Html.ActionLink("Save", "Save", "RolePermission", new { role = item.Roleid }, null)
            </tr>
        } 
    </table>
    <p>
        <input id="Submit" type="submit" value="Save" onclick="@Url.Action("Index", "RolePermission", new { id = Session["Roleid"] })" />leid"] })*@
    </p>
}