public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
var item = _context.Project.SingleOrDefault(t => t.Id == Project.Id);
var tags = _service.GetTagId(Project.Id);
//delete id
_service.RemoveProjectTags(tags.Except(TagId));
//add id
_service.AddProjectTags(TagId.Except(tags), item.Id);
if (item == null)
{
return(NotFound());
}
item.Name = Project.Name;
item.Title = Project.Title;
item.Address = Project.Address;
item.Description = Project.Description;
_context.Update(item);
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!ProjectExists(Project.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToPage("./Index"));
}
