public static Task <string> CalculateCandidateTestResult(SubjectTakensModel obj)
{
var responseStr = new TaskCompletionSource <string>();
using (var client = new HttpClient())
{
try
{
var stringContent = new StringContent(JsonConvert.SerializeObject(obj), Encoding.UTF8, "application/json");
var result = client.PostAsync(Constant.LocalhostURL + "SubjectTaken/CalculateCandidateTestResult/", stringContent).Result;
responseStr.TrySetResult(result.Content.ReadAsStringAsync().Result);
}
catch (Exception ex)
{
responseStr.TrySetResult(ex.Message.ToString());
}
return(responseStr.Task);
}
}
public TestExam()
{
SubjectTakensModel subjectTakenModel = new SubjectTakensModel();
InterviewsModel interviewsModel = new InterviewsModel();
List <Batch> batchModel = new List <Batch>();
Device.BeginInvokeOnMainThread(async() =>
{
var getCandidateIdByUserId = await Service.GetCandidateDetail(1); //here should be ACTContext.userId
if (getCandidateIdByUserId != null)
{
interviewsModel = JsonConvert.DeserializeObject <InterviewsModel>(getCandidateIdByUserId);
//batchModel = (List<Batch>)JsonConvert.DeserializeObject<List<Batch>>(getBatchList);
ACTContext.candidateId = interviewsModel.CandidateId;
//ACTContext.batchId = (from c in batchModel where c.CollegeId == interviewsModel.id select c.Id).SingleOrDefault();
subjectTakenModel.CandidateId = ACTContext.candidateId;
var getBatchList = await Service.GetBatch(ACTContext.candidateId);
subjectTakenModel.BatchId = int.Parse(getBatchList); //need to know how batch id works
}
});
List <QuestionSet> questions = new List <QuestionSet>();
Device.BeginInvokeOnMainThread(async() =>
{
var resultSubjectTakenModel = await Service.QuetionsListByQuetionSetId(subjectTakenModel);
var resultQuestions = await Service.GetQuestionSet();
if (resultQuestions != null && resultSubjectTakenModel != null)
{
subjectTakenModel = JsonConvert.DeserializeObject <SubjectTakensModel>(resultSubjectTakenModel);
questions = (List <QuestionSet>)JsonConvert.DeserializeObject <List <QuestionSet> >(resultQuestions);
TestExamLayout(subjectTakenModel);
examRemainigHour = subjectTakenModel.ExamDuration / 60;
examReamainingMinute = subjectTakenModel.ExamDuration % 60;
examRemainingSecond = 1;
}
});
}
public void TestExamLayout(SubjectTakensModel subjectTakenModel)
{
if (ACTContext.isLogin == true)
{
#region header text
Label lblTestScreenHeaderText = new Label {
Text = "Mock Test", HorizontalOptions = LayoutOptions.CenterAndExpand, TextColor = Color.White, FontSize = 20, FontAttributes = FontAttributes.Bold
};
StackLayout sLblTestScreenHeaderText = new StackLayout
{
Children = { lblTestScreenHeaderText },
Orientation = StackOrientation.Horizontal,
Padding = new Thickness(0, 50, 0, 0)
};
#endregion
#region start button
StackLayout sbtnStartTest = new StackLayout
{
Children = { btnStartTest },
Orientation = StackOrientation.Horizontal,
Padding = new Thickness(20, 10, 2, 8)
};
btnStartTest.Clicked += (object sender, EventArgs e) =>
{
btnStartTest.IsVisible = false;
slblQuestion.IsVisible = true;
bRadioAnswerOptions.IsVisible = true;
sbtnSubmitAnswer.IsVisible = true;
sbtnSubmitAnswer2.IsVisible = true;
};
#endregion
#region time remaining
if (countQuestion == 0)
{
Device.StartTimer(new TimeSpan(0, 0, 1), () =>
{
if (btnStartTest.IsVisible == false)
{
if (examRemainingSecond <= 0 && examReamainingMinute <= 0 && examRemainigHour <= 0)
{
return(false);
}
if (examRemainingSecond <= 0 && examReamainingMinute <= 0)
{
examRemainingSecond = 61;
examReamainingMinute = 61;
lblTestScreenTimeReamaining.Text = "Time remaining : " + --examRemainigHour + " Hours " + --examReamainingMinute + " Minutes " + --examRemainingSecond + " Seconds";
return(true);
}
if (examRemainingSecond <= 0)
{
examRemainingSecond = 61;
lblTestScreenTimeReamaining.Text = "Time remaining : " + examRemainigHour + " Hours " + --examReamainingMinute + " Minutes " + --examRemainingSecond + " Seconds";
return(true);
}
lblTestScreenTimeReamaining.Text = "Time remaining : " + examRemainigHour + " Hours " + examReamainingMinute + " Minutes " + --examRemainingSecond + " Seconds";
}
return(true);
});
sLblTestScreenTimeRemaining = new StackLayout
{
Children = { lblTestScreenTimeReamaining },
Orientation = StackOrientation.Horizontal,
Padding = new Thickness(0, 30, 0, 10)
};
}
#endregion
#region Question
List <QuestionsModel> setOfQuestions = new List <QuestionsModel>();
setOfQuestions = subjectTakenModel.QuestionsList;
Label lblQuestion = new Label {
HorizontalOptions = LayoutOptions.StartAndExpand, TextColor = Color.White, FontSize = 15, FontAttributes = FontAttributes.None
};
if (setOfQuestions.Count >= countQuestion + 1)
{
lblQuestion.Text = setOfQuestions[countQuestion].QuestionText;
}
else
{
lblQuestion.Text = "";
}
slblQuestion = new StackLayout
{
Children = { lblQuestion },
Orientation = StackOrientation.Horizontal,
Padding = new Thickness(20, 10, 20, 0)
};
#endregion
#region answers
CustomRadioButton radioAnswerOption1 = new CustomRadioButton();
CustomRadioButton radioAnswerOption2 = new CustomRadioButton();
CustomRadioButton radioAnswerOption3 = new CustomRadioButton();
CustomRadioButton radioAnswerOption4 = new CustomRadioButton();
if (setOfQuestions.Count >= countQuestion + 1)
{
radioAnswerOption1.Text = setOfQuestions[countQuestion].OptionsList[0].OptionText;
radioAnswerOption2.Text = setOfQuestions[countQuestion].OptionsList[1].OptionText;
radioAnswerOption3.Text = setOfQuestions[countQuestion].OptionsList[2].OptionText;
radioAnswerOption4.Text = setOfQuestions[countQuestion].OptionsList[3].OptionText;
bRadioAnswerOptions = new BindableRadioGroup()
{
Orientation = StackOrientation.Vertical,
Padding = new Thickness(20, 10, 20, 5)
};
bRadioAnswerOptions.ItemsSource = new[]
{
radioAnswerOption1.Text,
radioAnswerOption2.Text,
radioAnswerOption3.Text,
radioAnswerOption4.Text
};
bRadioAnswerOptions.CheckedChanged += BRadioAnswerOptions_CheckedChanged;
}
else
{
radioAnswerOption1.Text = "";
radioAnswerOption2.Text = "";
radioAnswerOption3.Text = "";
radioAnswerOption4.Text = "";
slblQuestion.IsVisible = false;
bRadioAnswerOptions.IsVisible = false;
sbtnSubmitAnswer.IsVisible = false;
sbtnSubmitAnswer2.IsVisible = false;
}
#endregion
#region submit button
Button btnSubmitAnswer = new Button {
Text = "Next", HorizontalOptions = LayoutOptions.StartAndExpand, BackgroundColor = Color.FromHex("4690FB"), TextColor = Color.White, BorderRadius = 10, WidthRequest = 100, FontAttributes = FontAttributes.Bold
};
Button btnCancelExam = new Button {
Text = "End test", HorizontalOptions = LayoutOptions.CenterAndExpand, BackgroundColor = Color.FromHex("4690FB"), TextColor = Color.White, BorderRadius = 10, WidthRequest = 100, FontAttributes = FontAttributes.Bold
};
Button btnBackToPreviousQuestion = new Button {
Text = "Previous", HorizontalOptions = LayoutOptions.EndAndExpand, BackgroundColor = Color.FromHex("4690FB"), TextColor = Color.White, BorderRadius = 10, WidthRequest = 100, FontAttributes = FontAttributes.Bold
};
sbtnSubmitAnswer = new StackLayout
{
Children = { btnSubmitAnswer, btnBackToPreviousQuestion },
Orientation = StackOrientation.Horizontal,
Padding = new Thickness(20, 10, 2, 8)
};
sbtnSubmitAnswer2 = new StackLayout
{
Children = { btnCancelExam },
Orientation = StackOrientation.Horizontal,
Padding = new Thickness(0, 5, 0, 5)
};
if (countQuestion == 0)
{
btnBackToPreviousQuestion.IsEnabled = false;
}
btnBackToPreviousQuestion.Clicked += (object sender, EventArgs e) =>
{
if (countQuestion > 1)
{
countQuestion--;
TestExamLayout(subjectTakenModel);
}
};
btnSubmitAnswer.Clicked += (object sender, EventArgs e) =>
{
subjectTakenModel.CandidateId = 1;
subjectTakenModel.BatchId = 6;
subjectTakenModel.QuestionId = setOfQuestions[countQuestion].QuestionId;
if (_selectedRadio == "first")
{
subjectTakenModel.SelectedAnswerId = setOfQuestions[countQuestion].OptionsList[0].OptionId;
}
else if (_selectedRadio == "second")
{
subjectTakenModel.SelectedAnswerId = setOfQuestions[countQuestion].OptionsList[1].OptionId;
}
else if (_selectedRadio == "third")
{
subjectTakenModel.SelectedAnswerId = setOfQuestions[countQuestion].OptionsList[2].OptionId;
}
else if (_selectedRadio == "fourth")
{
subjectTakenModel.SelectedAnswerId = setOfQuestions[countQuestion].OptionsList[3].OptionId;
}
else
{
subjectTakenModel.SelectedAnswerId = 0;
unAnswered++;
}
_selectedRadio = "";
Device.BeginInvokeOnMainThread(async() =>
{
var result = await Service.SaveAnswer(subjectTakenModel);
});
countQuestion++;
TestExamLayout(subjectTakenModel);
};
#endregion
#region stack and content layouts
Label lblAfterExamResponse = new Label {
HorizontalOptions = LayoutOptions.CenterAndExpand, TextColor = Color.FromHex("7AD169"), FontSize = 17, FontAttributes = FontAttributes.None
};
lblAfterExamResponse.IsVisible = false;
if (btnStartTest.IsVisible == true)
{
slblQuestion.IsVisible = false;
bRadioAnswerOptions.IsVisible = false;
sbtnSubmitAnswer.IsVisible = false;
sbtnSubmitAnswer2.IsVisible = false;
}
if (slblQuestion.IsVisible == false && bRadioAnswerOptions.IsVisible == false && btnStartTest.IsVisible == false)
{
sbtnSubmitAnswer.IsVisible = false;
sbtnSubmitAnswer2.IsVisible = false;
lblAfterExamResponse.IsVisible = true;
string result = "";
Device.BeginInvokeOnMainThread(async() =>
{
result = await Service.CalculateCandidateTestResult(subjectTakenModel);
lblTestScreenTimeReamaining.IsVisible = false;
TimeSpan finishedTime = new TimeSpan(examRemainigHour, examReamainingMinute, examRemainingSecond);
TimeSpan startedTime = new TimeSpan(subjectTakenModel.ExamDuration / 60, subjectTakenModel.ExamDuration / 60, 0);
lblAfterExamResponse.Text =
"Test finished. Thank you\n\nRight answers : "
+ result.ToString()
+ "\n\nWrong answers : " + (subjectTakenModel.QuestionsList.Count - int.Parse(result)) + "\n\nUnattended : " + (unAnswered++) + "\n\nPercentage : "
+ ((int.Parse(result) * 100) / subjectTakenModel.QuestionsList.Count) +
"%\n\nTime taken : " + startedTime.Subtract(finishedTime);
});
}
StackLayout slTestScreen = new StackLayout
{
Children = { sLblTestScreenHeaderText, sbtnStartTest,
sLblTestScreenTimeRemaining, slblQuestion, bRadioAnswerOptions,
sbtnSubmitAnswer, sbtnSubmitAnswer2,lblAfterExamResponse },
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
Padding = new Thickness(20, 0, 20, 0),
BackgroundColor = Color.Gray
};
ScrollView svTestScreenDetails = new ScrollView {
Content = slTestScreen
};
Content = svTestScreenDetails;
#endregion
}
else
{
Navigation.PushModalAsync(new Login());
}
}
