public Vote(User user, Survey survey, Answer answer)
: this()
{
this.User = user;
this.Survey = survey;
this.Answer = answer;
}
protected void SaveAnswer(Answer answer)
{
if (answer.Id == 0)
{
this.Answers.Add(answer);
}
else
{
this.Answers.Attach(answer);
}
this.SaveChanges();
}
async void createButton_Clicked(object sender, EventArgs e)
{
IsBusy = true;
// verify data of field
if ((editor.Text == "") || (e1.Text == "") || (e2.Text == ""))
{
Device.BeginInvokeOnMainThread(() => DisplayAlert("Error","Please provide at least a question and two options","OK") );
IsBusy = false;
return;
}
// Create data representation
Answer a1 = new Answer(e1.Text, 0);
Answer a2 = new Answer(e2.Text, 1);
List<Answer> answers = new List<Answer>();
answers.Add(a1);
answers.Add(a2);
if (e3.Text != "")
{
Answer a3 = new Answer(e3.Text, 2);
answers.Add(a3);
}
if (e4.Text != "")
{
Answer a4 = new Answer(e4.Text, 3);
answers.Add(a4);
}
Survey sur = new Survey(editor.Text.Trim());
sur.Answers = answers;
sur.Status = Survey.SurveyStatus.Published; //TODO: workflow for non-published surveys
sur.Course = cid;
// Send Survey to Server
try
{
await api.Backend.SaveSurveyAsync(sur);
}
catch (Exception ex)
{
Device.BeginInvokeOnMainThread(() => DisplayAlert("Error", "An Error occured while saving the survey: " + ex.Message, "OK"));
IsBusy = false;
return;
}
// Everythin worked fine!
Device.BeginInvokeOnMainThread(() => DisplayAlert("Success!", "The Survey was added", "OK"));
IsBusy = false;
}
public Result(Answer answer, int count)
: this()
{
this.Answer = answer;
this.Count = count;
}
public AnswerViewModel(Answer answer, Color backgroundColor)
{
Answer = answer;
RaisePropertyChanged ("AnswerText");
BackgroundColor = backgroundColor;
}