How to Update Existing Disconnected Entity

Question

I have this code which works in EntityFrameworkCore.

public void SaveProject(Project item)
    {
        var existing = _context.Projects.FirstOrDefault(a =&         


        

Answer 1

If you are certain that item exist in database, you can use Attach method of DbContext As following

public void SaveProject(Project item)
{
    _context.Projects.Attach(item);
    _context.Entity(item).State=EntityState.Modified;
    _context.SaveChanges();
}