public ActionResult SaveDescription(int id, string description)
{
using (PicturesGalleryEntities context = new PicturesGalleryEntities())
{
context.PictureDbEntities.Single(p => p.Id == id).Description = description;
context.SaveChanges();
}
return(RedirectToAction("Index", new { id }));
}
//
// GET: /Home/
public ActionResult Index(int?id)
{
List <PictureDbEntity> pictures;
using (PicturesGalleryEntities context = new PicturesGalleryEntities())
{
pictures = context.PictureDbEntities.ToList();
}
List <PictureViewModel> viewModels = MapPicturesToPictureViewModels(pictures).ToList();
if (id.HasValue)
{
PictureViewModel selectedViewModel = viewModels.Single(m => m.Id == id);
selectedViewModel.IsSelected = true;
selectedViewModel.MetaData = new ImageMetaData();
FillImageMetadata(id.Value, selectedViewModel.MetaData);
}
return(View(viewModels));
}
public ActionResult UploadPicture(HttpPostedFileBase file, int?selectedId)
{
if (file == null)
{
return(RedirectToAction("Index", new { id = selectedId }));
}
using (PicturesGalleryEntities context = new PicturesGalleryEntities())
{
PictureDbEntity newPicture = new PictureDbEntity
{
Name = file.FileName,
Description = "Sample picture description"
};
context.PictureDbEntities.Add(newPicture);
context.SaveChanges();
// Use Id from database as a file name because it's unique for each picture
string path = Path.Combine(Server.MapPath("~/Images"), newPicture.Id + Path.GetExtension(file.FileName));
file.SaveAs(path);
}
return(RedirectToAction("Index", new { id = selectedId }));
}
private void FillImageMetadata(int id, ImageMetaData metaData)
{
using (PicturesGalleryEntities context = new PicturesGalleryEntities())
{
PictureDbEntity picture = context.PictureDbEntities.Single(p => p.Id == id);
string filePath = Path.Combine(Server.MapPath("~/Images"), picture.Id + Path.GetExtension(picture.Name));
Image image = Image.FromFile(filePath, false);
PropertyItem[] propertyItems = image.PropertyItems;
List <int> ids = new List <int> {
0x010F, 0x0110, 0x829A, 0x0132, 0x0103, 0x9000
};
if (!propertyItems.Select(i => i.Id).Intersect(ids).Any())
{
return;
}
metaData.MetadataExists = "true";
PropertyItem manufacturerPropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x010F);
if (manufacturerPropertyItem != null)
{
metaData.EquipmentManufacturer = new ASCIIEncoding().GetString(manufacturerPropertyItem.Value);
}
PropertyItem modelPropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x0110);
if (modelPropertyItem != null)
{
metaData.EquipmentModel = new ASCIIEncoding().GetString(modelPropertyItem.Value);
}
PropertyItem exposureTimePropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x829A);
if (exposureTimePropertyItem != null)
{
metaData.ExposureTime = GetExposureTimeFromBytes(exposureTimePropertyItem.Value);
}
PropertyItem dateTakenPropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x0132);
if (dateTakenPropertyItem != null)
{
metaData.DateTaken = new ASCIIEncoding().GetString(dateTakenPropertyItem.Value);
}
PropertyItem exifVersionPropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x9000);
if (exifVersionPropertyItem != null)
{
metaData.ExifVersion = new ASCIIEncoding().GetString(exifVersionPropertyItem.Value).Insert(2, ".").Trim('0');
}
PropertyItem latitudePropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x0002);
PropertyItem latitudeRefPropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x0001);
PropertyItem longitudePropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x0004);
PropertyItem longitudeRefPropertyItem = propertyItems.SingleOrDefault(i => i.Id == 0x0003);
if (latitudePropertyItem != null && latitudeRefPropertyItem != null && longitudePropertyItem != null &&
longitudeRefPropertyItem != null)
{
metaData.LatitudeLongitude = GetLatitudeLongitude(latitudePropertyItem.Value,
longitudePropertyItem.Value, latitudeRefPropertyItem.Value, longitudeRefPropertyItem.Value);
}
}
}