Mvc5将模型从操作[httpget]传递到[httppost]，有些值有效，但有些为空

Question

我正在将模型从get视图传递到post视图，并且我的一些值正确。我需要的最重要的值是null。 ID和UserID…我尝试过[bind]并改变了许多不同的方法来尝试使它起作用，但到目前为止，在我的httppost中它仍然为null。进入我的视图的值是正确的。 这是我的代码。

//GET: /TimeSheet/UserEditTimeSheet/{uid}{mid}{did}
        public async Task<ActionResult> UserEditTimeSheet(string uid,int mid)
        {            
            ViewBag.ProjectsSelect = new SelectList(
                context.Projects.ToList(), "ProjectId", "ProjectName");

            var tmaster = await context.TimeSheetMaster.Where(m => m.TimeSheetMasterId
                          == mid && m.UserId == uid).FirstOrDefaultAsync();
            var tdetail = await context.TimeSheetDetails.Where(d => d.TimeSheetMasterId 
                          == tmaster.TimeSheetMasterId).FirstOrDefaultAsync();
            var tproj = await context.Projects.Where(p => p.ProjectId 
                        == tdetail.ProjectId).FirstOrDefaultAsync();
            var timeSheet = (from t in context.TimeSheetMaster
                             join d in context.TimeSheetDetails
                             on t.TimeSheetMasterId equals d.TimeSheetMasterId
                             where d.TimeSheetMasterId == mid
                             && d.TimeSheetId == tdetail.TimeSheetId
                             select new TimeSheetProjectsModel()
                             {
                                 TimeMasterId = t.TimeSheetMasterId,
                                 TimeDetailsId = d.TimeSheetId,
                                 P1w1d1 = d.Sunday,
                                 P1w1d2 = d.Monday,
                                 P1w1d3 = d.Tuesday,
                                 P1w1d4 = d.Wednesday,
                                 P1w1d5 = d.Thursday,
                                 P1w1d6 = d.Friday,
                                 P1w1d7 = d.Saturday,
                                 ProjTotal1 = (int)t.TotalHours,
                                 DaysOfWeek1 = tproj.ProjectName,
                                 ProjectId1 = tproj.ProjectId,
                                 UserId = t.UserId,
                                 ProjDesc1 = t.Comment
                             });
            if (timeSheet == null)
                return HttpNotFound();

            return View(await timeSheet.FirstOrDefaultAsync());
        }
        // POST: /TimeSheet/UserEditTimeSheet/{timesheetprojectsmodel}
        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<ActionResult> UserEditTimeSheet(TimeSheetProjectsModel model)
        {
            try
            {
                if(model == null)
                {
                    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
                }
                if (ModelState.IsValid)
                {
                    // Rewrite TimeSheetMaster
                    var master = await context.TimeSheetMaster.Where(t => 
                        t.TimeSheetMasterId == model.TimeMasterId).FirstOrDefaultAsync();
                    master.Comment = model.ProjDesc1;
                    var details = await context.TimeSheetDetails.Where(t =>
                        t.TimeSheetMasterId == model.TimeMasterId && 
                        t.TimeSheetId == model.TimeDetailsId).FirstOrDefaultAsync();
                    details.ProjectId = model.ProjectId1;
                    details.Sunday = model.P1w1d1;
                    details.Monday = model.P1w1d2;
                    details.Tuesday = model.P1w1d3;
                    details.Wednesday = model.P1w1d4;
                    details.Thursday = model.P1w1d5;
                    details.Friday = model.P1w1d6;
                    details.Saturday = model.P1w1d7;
                    details.Hours = model.ProjTotal1;

                    context.Entry(master).State = EntityState.Modified;
                    context.Entry(details).State = EntityState.Modified;
                    await context.SaveChangesAsync();
                    TempData["Success"] = "TimeSheet Edit Successful";
                    return RedirectToAction("UserTimeSheets", model.UserId);
                }
                TempData["Error"] = "TimeSheet Edit Failure";
                return RedirectToAction("UserTimeSheets", model.UserId);
            }
            catch (Exception ex)
            {
                Console.Write(ex.Message);
                TempData["ErrorMaster"] = "TimeSheet Create Was Unsuccessful";
                return RedirectToAction("TimeSheetList", "TimeSheet");
            }
        }