protected override async Task HandleRequirementAsync(
   AuthorizationHandlerContext context,
   DynamicPermissionRequirement requirement)
{
    if (!(context.Resource is AuthorizationFilterContext mvcContext))
    {
      return;
    }

    var actionDescriptor = mvcContext.ActionDescriptor;
    actionDescriptor.RouteValues.TryGetValue("area", out var areaName);
    var area = string.IsNullOrWhiteSpace(areaName) ? string.Empty : areaName;

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;

namespace ASPNETCoreIdentitySample.Services.Identity
{
    public class DynamicPermissionsAuthorizationHandler : AuthorizationHandler<DynamicPermissionRequirement>
    {
        private readonly IHttpContextAccessor _httpContextAccessor;

        public DynamicPermissionsAuthorizationHandler(IHttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor = httpContextAccessor ?? throw new ArgumentNullException(nameof(httpContextAccessor));
        }

        protected override async Task HandleRequirementAsync(
             AuthorizationHandlerContext context,
             DynamicPermissionRequirement requirement)
        {
            var routeData = _httpContextAccessor.HttpContext.GetRouteData();

            var areaName = routeData?.Values["area"]?.ToString();
            var area = string.IsNullOrWhiteSpace(areaName) ? string.Empty : areaName;

        public void PageFinished(PdfWriter writer, Document document, IList<SummaryCellData> columnCellsSummaryData)
        {
            var pageSize = document.PageSize;
            var text = "صفحه " + writer.PageNumber + " از ";
            var textLen = _font.BaseFont.GetWidthPoint(text, _font.Size) + 17;
            var positionX = pageSize.Right - 10;
            var align = _direction == PdfRunDirection.RightToLeft ? Element.ALIGN_RIGHT : Element.ALIGN_LEFT;
            ColumnText.ShowTextAligned(
                canvas: _pdfContentByte,
                alignment: align,
                phrase: ReportMethod.SetFont(text, 20),
                x: positionX,
                y: pageSize.GetBottom(4),
                rotation: 0,
                runDirection: (int)_direction,
                arabicOptions: 0);
            var x = _direction == PdfRunDirection.RightToLeft ? positionX - textLen : positionX + textLen;
            _pdfContentByte.AddTemplate(_template, x, pageSize.GetBottom(4));
            //--------------------------------------
            if (_Info != null)
            {
                var table = new PdfGrid(1) { RunDirection = (int)_direction, WidthPercentage = 100 };

                string[] msgField = { "مدیر گروه", _Info.Where(sp => sp.ID == _MemberID).FirstOrDefault().InstKindName, _Info.Where(sp => sp.ID == 0).FirstOrDefault().InstKindName, "امور مالی", "معاون پشتیبانی" };
                string[] dataField = { "", _Info.Where(sp => sp.ID == _MemberID).FirstOrDefault().MasterName, _Info.Where(sp => sp.ID == 0).FirstOrDefault().MasterName, "", _Info.Where(sp => sp.ID == 1).FirstOrDefault().MasterName };
                var infoTable = new PdfGrid(msgField.Length) { RunDirection = PdfWriter.RUN_DIRECTION_RTL, WidthPercentage = 100 };
                foreach (var item in msgField)
                {
                    infoTable.AddCell(ReportMethod.SetCell(item, PdfPCell.NO_BORDER, 1, PdfPCell.ALIGN_CENTER, PdfPCell.ALIGN_MIDDLE, true, 20));
                }
                foreach (var item in dataField)
                {
                    infoTable.AddCell(ReportMethod.SetCell(item, PdfPCell.NO_BORDER, 1, PdfPCell.ALIGN_CENTER, PdfPCell.ALIGN_MIDDLE, true, 20));
                }

                table.AddCell(infoTable);
                table.SetTotalWidth(new[] { pageSize.Width - document.LeftMargin - document.RightMargin });
                table.WriteSelectedRows(
                        rowStart: 0,
                        rowEnd: -1,
                        xPos: document.LeftMargin,
                        yPos: document.BottomMargin - 10,
                        canvas: writer.DirectContent);

            }
        }