使用 AddSync 保存更改

Question

我是 C# 的初学者，我在代码中遇到问题，我使用 Edit 方法作为索引，所以我使用 AddAsync，但是当我运行代码时，它只是跳过该行，而且它没有保存。

这是编辑方法：

        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<ActionResult> Edit(int id, IEnumerable<ModelProfileTraceClass> model)
        {
            try
            {
                var selectedClasses = model.Where(m => m.IsSelected).ToList();
                var obj = Mapper.Map<IEnumerable<ProfileTraceClass>>(selectedClasses);

                foreach (var objs in obj)
                {
                    await _appServiceProfileTraceClass.AddAsync(objs).ConfigureAwait(false);

                }
                return RedirectToAction("Index", "DB2ProfileTraceType", new { id = ViewBag.ProfileTraceTypeId });
            }
            catch (Exception ex)
            {
                ViewBag.ErrorMessage = ex.Message;
                return View(model);
            }
        }

 public async Task<ActionResult> Edit(int id)
 {
     // Usei ToList() para evitar o erro de execução 
     var profileTraceClassList = _appServiceProfileTraceClass.GetAll().ToList();
     var traceClassList = _appServiceTraceClass.GetAll().ToList();
 
     var traceClassData = (from traceClass in traceClassList
                           join profileTraceClass in profileTraceClassList
                           on traceClass.Id equals profileTraceClass.TraceClassId into traceClassesGroup
                           from profileTraceClass in traceClassesGroup.DefaultIfEmpty()
                           select new ModelProfileTraceClass
                           {
                               TraceClassId = traceClass.Id,
                               ProfileTraceId = id,
                               IsSelected = profileTraceClass != null && profileTraceClass.ProfileTraceId == id,
                               Description = traceClass.Description
 
                           }).ToList();
     ViewBag.ProfileTraceTypeId = id;
 
     return View(traceClassData);
 }

Answer 1

您没有发布您的 _appServiceProfileTraceClass，但在 AddAsync 方法中，您是否有类似以下内容：await repo.SaveChangesAsync(); ？