public async Task SaveAct(ActInfo actModel)
{
var act = await repository.GetOrInsertAct(actModel.ActGuid);
var lastActDescription = act.Descriptions
.OrderByDescending(description => description.ModifiedDate)
.FirstOrDefault();
if (lastActDescription == null ||
lastActDescription.Title != actModel.Title ||
lastActDescription.ImageHash != actModel.ImageHash)
{
var modifiedTicks = lastActDescription?.ModifiedDate.Ticks ?? 0;
if (modifiedTicks != actModel.LastModifiedTicks)
{
throw new DbUpdateConcurrencyException("A new update has occurred since you loaded the page. Please refresh and try again.");
}
await repository.AddAsync(new ActDescription
{
ModifiedDate = DateTime.UtcNow,
Act = act,
Title = actModel.Title,
ImageHash = actModel.ImageHash
});
await repository.SaveChangesAsync();
}
}
public async Task <IActionResult> Edit(Guid id, [Bind("Title,Image,ImageHash,LastModifiedTicks")] ActInfo act)
{
var imageHash = await SaveImageContent(act);
if (ModelState.IsValid)
{
act.ActGuid = id;
act.ImageHash = imageHash;
await actCommands.SaveAct(act);
return(RedirectToAction(nameof(Index)));
}
return(View(act));
}
private async Task <string> SaveImageContent(ActInfo act)
{
if (act.Image != null)
{
using var imageReadStream = act.Image.OpenReadStream();
using var imageMemoryStream = new MemoryStream();
await imageReadStream.CopyToAsync(imageMemoryStream);
var imageHash = await contentCommands.SaveContent(imageMemoryStream.ToArray(), act.Image.ContentType);
return(imageHash);
}
else
{
return(act.ImageHash);
}
}