public async Task<ActionResult> Upload(LocationImageViewModel viewModel)
{
System.Diagnostics.Debug.WriteLine("----------------------------------------");
System.Diagnostics.Debug.WriteLine("LocationImageController.Upload()");
// List of allowed image types (for hosting on web)
var validImageTypes = new string[]
{
"image/gif",
"image/jpeg",
"image/pjpeg", // needed for compatability with some older jpegs
"image/png"
};
// 1. check if file is null, or of zero length
if (viewModel.ImageUpload == null || viewModel.ImageUpload.ContentLength == 0)
{
System.Diagnostics.Trace.WriteLine("Image is null");
ModelState.AddModelError("ImageUpload", "This field is required.");
}
// 2. check if file is null, or of zero length
else if (viewModel.ImageUpload == null || viewModel.ImageUpload.ContentLength == 0)
{
System.Diagnostics.Trace.WriteLine("Uploaded file is empty");
ModelState.AddModelError("ImageUpload", "Image file cannot be empty.");
}
// 3. check that image is of a valid filetype
else if (!validImageTypes.Contains(viewModel.ImageUpload.ContentType))
{
System.Diagnostics.Trace.WriteLine("Invalid Image Type");
ModelState.AddModelError("ImageUpload", "Please choose either a GIF, JPG or PNG image.");
}
if (ModelState.IsValid)
{
System.Diagnostics.Debug.WriteLine("ModelState is valid!");
// Upload Image to Blob Storage
string imageUrl = await photoService.UploadPhotoAsync(viewModel.ImageUpload);
System.Diagnostics.Debug.WriteLine("Uploaded image to URL: {1}", imageUrl);
// create
var locationImage = new LocationImage
{
LocationID = viewModel.LocationID,
Title = viewModel.Title,
AltText = "Image from " + db.Locations.Find(viewModel.LocationID).Label,
DateTaken = viewModel.DateTaken,
DateCreated = DateTime.UtcNow,
DateModified = DateTime.UtcNow,
ImageUrl = imageUrl,
User = manager.FindById(User.Identity.GetUserId())
};
// save LocationImage model in database
db.LocationImages.Add(locationImage);
db.SaveChanges();
System.Diagnostics.Debug.WriteLine("Saved {0} '{1}' to the database.", locationImage.AltText, locationImage.Title);
return RedirectToAction("Media", "Location", new { locationID = viewModel.LocationID });
}
ViewBag.PlaceholderUrl = "~/Content/ImagePreview.png";
ViewBag.LocationLabel = db.Locations.Find(viewModel.LocationID).Label;
return View(viewModel);
}
public ActionResult CreateByUrl(LocationImageUrlViewModel model)
{
// TODO finish
// List of allowed image types (for hosting on web)
var validImageTypes = new string[]
{
".gif",
".jpg",
".jpeg",
".pjpeg", // needed for compatability with some older jpegs
".png"
};
// 1. check if a valid image was uploaded
if (model.ImageUrl == null || model.ImageUrl.Length == 0)
{
System.Diagnostics.Debug.WriteLine("Image is null or empty");
ModelState.AddModelError("ImageUpload", "This field is required");
}
// 2. check that image is of a valid filetype
else
{
bool hasValidExtension = false;
foreach (String s in validImageTypes)
{
if (model.ImageUrl.EndsWith(s))
{
hasValidExtension = true;
break;
}
}
if (!hasValidExtension)
{
System.Diagnostics.Debug.WriteLine("Invalid Image Type");
ModelState.AddModelError("ImageUpload", "Please choose either a GIF, JPG or PNG image.");
}
}
// 3. create the Image entry to save to the database
if (ModelState.IsValid)
{
System.Diagnostics.Debug.WriteLine("Model state is valid");
// initialize image model to store in database
var locationImage = new LocationImage
{
LocationID = model.LocationID,
Title = model.Title,
AltText = "Image from " + db.Locations.Find(model.LocationID).Label,
DateTaken = model.DateTaken,
DateCreated = DateTime.UtcNow,
DateModified = DateTime.UtcNow,
ImageUrl = model.ImageUrl,
User = manager.FindById(User.Identity.GetUserId())
};
// save LocationImage model in database
db.LocationImages.Add(locationImage);
db.SaveChanges();
return RedirectToAction("Media", "Location", new { locationID = model.LocationID });
}
// otherwise, go back to create view.
System.Diagnostics.Debug.WriteLine("Model state is invalid.");
ViewBag.LocationID = model.LocationID;
ViewBag.LocationLabel = db.Locations.Find(model.LocationID).Label;
ViewBag.PlaceholderUrl = "~/Content/ImagePreview.png";
ViewBag.LocationCount = db.Locations.Count();
return View(model);
}