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KretaWeb/Areas/Adatszolgaltatasok/Logic/ItmAdatszolgaltatasLogic.cs

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+using System;
+using System.IO;
+using System.Linq;
+using System.Web.Mvc;
+using ICSharpCode.SharpZipLib.Zip;
+using Kreta.BusinessLogic.Helpers;
+using Kreta.Resources;
+using Kreta.Web.Helpers;
+using Kreta.Web.Security;
+
+namespace Kreta.Web.Areas.Adatszolgaltatasok.Logic
+{
+    public static class ItmAdatszolgaltatasLogic
+    {
+        public static FileStreamResult EllenorzoTablazatLetoltese()
+        {
+            var memoryStreamList = new ItmAdatszolgaltatasHelper(ConnectionTypeExtensions.GetSessionConnectionType()).IntezmenyAdatok();
+
+            var fajlNev = $"{ ClaimData.IntezmenyAzonosito }_{ AdatszolgaltatasokResource.ItmAdatszolgaltatasExcelExportFajlNev}_{ DateTime.Now.ToString("yyyyMMddHHmm")}";
+
+            if (memoryStreamList.Count == 1)
+            {
+                return new FileStreamResult(memoryStreamList.FirstOrDefault(), Constants.ImportExport.FileFormatXlsx)
+                {
+                    FileDownloadName = $"{fajlNev}.{Constants.ImportExport.FileFormatXlsx}"
+                };
+            }
+            else
+            {
+                var outputStream = new MemoryStream();
+                var zipOutputStream = new ZipOutputStream(outputStream);
+
+                var buffer = new byte[4096];
+
+                for (int i = 0; i < memoryStreamList.Count; i++)
+                {
+                    var entry = new ZipEntry($"{fajlNev}_{i}.{Constants.ImportExport.FileFormatXlsx}");
+                    zipOutputStream.PutNextEntry(entry);
+
+                    int sourceBytes;
+                    do
+                    {
+                        sourceBytes = memoryStreamList[i].Read(buffer, 0, buffer.Length);
+                        zipOutputStream.Write(buffer, 0, sourceBytes);
+                    } while (sourceBytes > 0);
+                }
+                zipOutputStream.Finish();
+                outputStream.Position = 0;
+
+                return new FileStreamResult(outputStream, Constants.ImportExport.ContentType)
+                {
+                    FileDownloadName = $"{fajlNev}.{Constants.ImportExport.FileFormatZip}"
+                };
+            }
+        }
+    }
+}