public void UpdateAnswers()
{
var existingParent = Context.Questions
.Where(p => p.QuestionId == Question.QuestionId)
.SingleOrDefault();
foreach (var existingChild in existingParent.Answers.ToList())
{
if (!QuestionAnswers.Any(c => c.AnswerId == existingChild.AnswerId))
{
Context.Answers.Remove(existingChild);
}
}
foreach (var childModel in QuestionAnswers)
{
var existingChild = existingParent.Answers
.Where(c => c.AnswerId == childModel.AnswerId)
.SingleOrDefault();
if (existingChild != null && existingChild?.AnswerId != 0)
{
Context.Entry(existingChild).CurrentValues.SetValues(childModel);
}
else
{
var newChild = new Answer
{
Text = childModel.Text,
IsCorrect = childModel.IsCorrect,
Question = existingParent,
QuestionId = existingParent.QuestionId
};
existingParent.Answers.Add(newChild);
}
}
}
bool IsExistIsCorrectTrueAnswers()
{
return(QuestionAnswers.Any(q => q.IsCorrect == true));
}
bool IsEmptyTextAnswers()
{
return(QuestionAnswers.Any(q => string.IsNullOrEmpty(q.Text)));
}
