public async Task <IActionResult> Download(int id)
{
EducationalMaterial em = await universityData.EducationalMaterials.GetByIdAsync(id);
List <Media> materials = em.Materials;
List <byte[]> files = new List <byte[]>();
byte[] compressed;
foreach (var material in materials)
{
string path = _webHost.WebRootPath;
files.Add(System.IO.File.ReadAllBytes(Path.Combine(path, material.GetPath())));
}
using (MemoryStream memoryStream = new MemoryStream())
{
using var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true);
for (int i = 0; i < materials.Count; i++)
{
var fileInArchive = archive.CreateEntry(materials[i].MediaName, CompressionLevel.Optimal);
using var entryStream = fileInArchive.Open();
using var fileToCompressStream = new MemoryStream(files[i]);
fileToCompressStream.CopyTo(entryStream);
}
archive.Dispose();
compressed = memoryStream.ToArray();
}
//GCSettings.LargeObjectHeapCompactionMode = GCLargeObjectHeapCompactionMode.CompactOnce;
GC.Collect(2, GCCollectionMode.Forced, false, true);
return(File(compressed, "application/zip", em.Name + ".zip"));
}
public Media(EducationalMaterial educationalMaterial, string mediaName, string contentType, string partialMediaPath, User user)
{
EducationalMaterial = educationalMaterial;
ContentType = contentType;
MediaName = mediaName;
PartialMediaPath = partialMediaPath;
User = user;
CreatedDate = DateTime.Now;
}
public async Task <IActionResult> AddMaterial(EducationalMaterialViewModel model, IFormFileCollection uploads)
{
Employee employee = await universityData.Employees.GetByFullNameAsync(model.EmployeeFullName);
if (employee == null)
{
ModelState.AddModelError("FullName", "Преподаватель не найден");
}
if (uploads.Count <= 0)
{
ModelState.AddModelError("Files", "Не загржен ни один файл");
}
List <Media> medias = new List <Media>();
if (ModelState.IsValid)
{
EducationalMaterial em = new EducationalMaterial()
{
Name = model.Name,
Employee = await universityData.Employees.GetByFullNameAsync(model.EmployeeFullName),
Description = model.Description,
Subject = model.Subject,
Type = model.Type,
Materials = medias
};
await universityData.EducationalMaterials.AddAsync(em);
string patrialPath = "Content/EducationalMaterials/" + String.Format("{0}_{1}",
DateTime.Now.ToString("yyyy_MM_dd_HH_mm_ss"), model.Name.Transliterate());
string path = Path.Combine(_webHost.WebRootPath, patrialPath);
Directory.CreateDirectory(path);
foreach (var file in uploads)
{
using (var fileSteam = new FileStream(Path.Combine(path, file.FileName), FileMode.Create))
{
await file.CopyToAsync(fileSteam);
}
medias.Add(new Media(em,
file.FileName, file.ContentType, patrialPath, await _userManager.GetUserAsync(User)));
}
foreach (var media in medias)
{
media.EducationalMaterial = em;
}
foreach (var media in medias)
{
await universityData.Medias.AddAsync(media);
}
universityData.SaveAsync();
return(RedirectToAction("GetMaterials", "EducationalMaterials"));
}
ViewBag.Types = Types;
return(View(model));
}
