How to instantly access the saved row - asp.net-mvc

Question

I was wrote some code in Asp MVC with EF technology, I have condition line to find row with today date if i was not found i add it to database and then use the saved row for another process, but i get error when i refresh error page it work fine ! i think my code can not work async!
any body can help me to found my wrong ?
public ActionResult LineRegimeSave(string breakFast, string snake1, string lunch, string snake2, string snake3,string dinner, string snake4,string adviseText, string docFooterId)
{
ApplicationDbContext myContext = new ApplicationDbContext();
var docFooter = docFooterId != "null" ? myContext.DocFooters.Single(d => d.Id.ToString() == docFooterId) : null;
var strLine="BreakFast,"+ breakFast + "/Snake1,"+ snake1 + "/Lunch,"+ lunch + "/Snake2,"+ snake2 + "/Snake3,"+ snake3 + "/Dinner,"+ dinner + "/Snake4,"+snake4;
TriageRecord getMedicalRecId;
var userId = Session["NID"];
var userProfile = myContext.UserProfiles.Single(b => b.NationalId.ToString() == userId.ToString());
getMedicalRecId = myContext.TriageRecords.Where(u => u.UserProfile.Id == userProfile.Id)
.OrderByDescending(d => d.DateTime).First();
if (getMedicalRecId.DateTime.Date != DateTime.Today)
{
TriageRecord insert = new TriageRecord
{
Bust = getMedicalRecId.Bust,
Diastolic = getMedicalRecId.Diastolic,
HeartRate = getMedicalRecId.HeartRate,
Systolic = getMedicalRecId.Systolic,
Height = getMedicalRecId.Height,
Weight = getMedicalRecId.Weight,
Wrist = getMedicalRecId.Wrist,
Waist = getMedicalRecId.Waist,
Hips = getMedicalRecId.Hips,
UserProfile = getMedicalRecId.UserProfile,
DateTime = DateTime.Now
};
insert.MedicalRecord = new MedicalRecord
{
TriageRecord = insert,
VisitDate = DateTime.Now,
};
myContext.TriageRecords.Add(insert);
myContext.SaveChanges();
getMedicalRecId = myContext.TriageRecords.Where(u => u.UserProfile.Id == userProfile.Id)
.OrderByDescending(d => d.DateTime).First();
getMedicalRecId.MedicalRecord.MedicalRecordDetails.Add
(
new MedicalRecordDetail
{
DateTime = DateTime.Now,
VisitMode = "LineDiet",
VisitSummary = strLine,
DocFooter = docFooter,
AdviseText = adviseText
}
);
myContext.SaveChanges();
}
else
{
getMedicalRecId.MedicalRecord.MedicalRecordDetails.Add
(
new MedicalRecordDetail
{
DateTime = DateTime.Now,
VisitMode = "LineDiet",
VisitSummary = strLine,
DocFooter = docFooter,
AdviseText = adviseText
}
);
myContext.SaveChanges();
}
return RedirectToAction("LineRegimePrint",new { id = getMedicalRecId.Id});
}
Error occur on this line :
getMedicalRecId.MedicalRecord.MedicalRecordDetails.Add
(
new MedicalRecordDetail
{
DateTime = DateTime.Now,
VisitMode = "LineDiet",
VisitSummary = strLine,
DocFooter = docFooter,
AdviseText = adviseText
}
);
Error text is : Null reference...
Thank you.
update :
insert.MedicalRecord = new MedicalRecord
{
TriageRecord = insert,
VisitDate = DateTime.Now,
};
myContext.TriageRecords.Add(insert);
myContext.SaveChanges();
Do i need to change this code ?
var a = insert.MedicalRecord = new MedicalRecord
{
TriageRecord = insert,
VisitDate = DateTime.Now,
};
myContext.TriageRecords.Add(insert);
myContext.MedicalRecords.Add(a);

Answer 1

So according to you the problem occurs whenever you try to add an item to the list, but it says the object is null, so you need to check for that.
public ActionResult LineRegimeSave(string breakFast, string snake1, string lunch, string snake2, string snake3,string dinner, string snake4,string adviseText, string docFooterId)
{
...
getMedicalRecId = myContext.TriageRecords.Where(u => u.UserProfile.Id == userProfile.Id).OrderByDescending(d => d.DateTime).First();
if(getMedicalRecId != null) {
if (getMedicalRecId.DateTime.Date != DateTime.Today)
{
...
insert.MedicalRecord = new MedicalRecord
{
TriageRecord = insert,
VisitDate = DateTime.Now,
MedicalRecordDetails = new List<MedicalRecordDetail>(){ new MedicalRecordDetail
{
DateTime = DateTime.Now,
VisitMode = "LineDiet",
VisitSummary = strLine,
DocFooter = docFooter,
AdviseText = adviseText
}
};
myContext.SaveChanges();
}
}
else
{
....
}
else
{
throw new Exception("The current user profile has no triage records!");
}
return RedirectToAction("LineRegimePrint",new { id = getMedicalRecId.Id});
}