protected void btnSearch_Click(object sender, EventArgs e)
        {
            int pageSize = ucDataNavigator.PageSize;
            int rowCount = 0;
            Admins vcontroller = new Admins();
            DateTime ngaydat = Convert.ToDateTime(txtsearch.Text);
            string errMsg = string.Empty;
            try
            {
                Repeater1.DataSource = vcontroller.getall_danhthu_para(ngaydat, 1, pageSize, ref rowCount, ref errMsg);
                PreparePaging(1, pageSize, rowCount);
                Repeater1.DataBind();
            }
            catch (Exception ex) { Response.Write(ex.Message); }
            finally
            {
                vcontroller = null;

            }
        }