private void FillUsers()
{
string OCODE = Convert.ToString(((SessionUser)Session["SessionUser"]).OCode);
ddlUser.DataSource = aEmployeeBll.GetAllEmployeeByDept(OCODE, ddlDepartment.SelectedValue);
ddlUser.DataValueField = "EID";
ddlUser.DataTextField = "FullName";
ddlUser.DataBind();
ddlUser.Items.Insert(0, new ListItem("Select One", ""));
}