//查数据库使用Linq表达式
/// <summary>
        /// 分页获取数据
        /// </summary>
        /// <param name="PageIndex"></param>
        /// <param name="PageSize"></param>
        /// <param name="total"></param>
        /// <param name="DepartmentID"></param>
        /// <returns></returns>
        public static IList<c_operator> GetListPage(int PageIndex, int PageSize, out int total)
        {
            try
            {
                using (CertDataContext cdc = new CertDataContext(Tool.sqlstr))
                {
                    total = cdc.c_operator.Count();
                    return cdc.c_operator.Skip(PageIndex * PageSize).Take(PageSize).ToList();
                }
            }
            catch (Exception)
            {
                total = 0;
                return null;
            }
        }

//GriedView绑定数据源
 public void gvBind()
    {
        int count = 0;
        this.GridView1.DataSource = DepartmentBLL.GetAll(Pager1.PageIndex, Pager1.PageSize, out count);
        this.GridView1.DataBind();
        Pager1.ItemCount = count;
        if (count > Pager1.PageSize)
        {
            Pager1.Visible = true;
        }
        else
            Pager1.Visible = false;
    }