protected bool SaveQuiz(String quizJson)
{
DatabaseEntities db = new DatabaseEntities();
try {
var userId = Int32.Parse(Session["userId"].ToString());
/* make sure safety replacements are reverted */
quizJson.Replace("<", "<");
quizJson.Replace(">", ">");
LocalQuiz localQuiz = JsonConvert.DeserializeObject <LocalQuiz>(quizJson);
localQuiz.teacherId = userId;
if (updateMode.Value == "true")
{
localQuiz.id = Int32.Parse(ViewState["quizId"].ToString());
localQuiz.UpdateQuiz(db);
}
else
{
localQuiz.CreateQuiz(db);
}
return(true);
} catch (Exception error) {
throw error;
}
}
protected void CommandHandler(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "Edit")
{
Response.Redirect("/teacher_quizzes/new_quiz.aspx?quizId=" + e.CommandArgument.ToString());
}
if (e.CommandName == "Delete")
{
try
{
var database = new DatabaseEntities();
var quizId = Int32.Parse(e.CommandArgument.ToString());
var teacherId = Int32.Parse(Session["userId"].ToString());
var quiz = database.Quiz.Where(q => q.teacherId == teacherId &&
q.id == quizId).Single();
var localQuiz = LocalQuiz.ToLocalQuiz(quiz);
localQuiz.DeleteQuiz(database);
e.Item.Visible = false;
}
catch
{
//
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
return;
}
try {
if (string.IsNullOrEmpty(Request.QueryString["quizId"]) ||
string.IsNullOrWhiteSpace(Request.QueryString["teacherId"]))
{
throw new Exception();
}
var quizId = Int32.Parse(Request.QueryString["quizId"]);
var teacherId = Int32.Parse(Request.QueryString["teacherId"]);
var db = new DatabaseEntities();
var quiz = db.Quiz.Where(q => q.id == quizId && q.teacherId == teacherId).Single();
quizTitle.InnerText = quiz.title;
quizDescription.InnerText = quiz.description;
totalMarks.InnerText = quiz.totalMarks.ToString();
totalQuestions.InnerText = quiz.Question.Count().ToString();
var localQuiz = LocalQuiz.ToLocalQuiz(quiz);
/* remove correct answer hints from options */
foreach (var q in localQuiz.questions)
{
if (q.type == "Multiple Choice" || q.type == "Checkboxes")
{
foreach (var o in q.options)
{
o.valid = false;
}
}
}
quizJSON.Value = JsonConvert.SerializeObject(localQuiz);
if (string.IsNullOrEmpty(quizDescription.InnerText))
{
quizDescription.InnerText = "This quiz has no description!";
}
/* register client scripts */
Type scriptType = this.GetType();
String scriptName = "script";
String scriptUrl = "./take_quiz.js";
String scriptText = File.ReadAllText(Server.MapPath(scriptUrl));
ClientScriptManager scriptManager = Page.ClientScript;
if (!scriptManager.IsClientScriptBlockRegistered(scriptType, scriptName))
{
scriptManager.RegisterClientScriptBlock(scriptType, scriptName, scriptText, true);
}
} catch (Exception err)
{
takeQuizError.InnerText = "Unable to load quiz! Some unknown error occured.";
takeQuizError.Visible = true;
takeQuizView.Visible = false;
}
}
protected void Page_Load(object sender, EventArgs e)
{
/* validate login */
Master.ValidateSession();
if (IsPostBack)
{
var button = (Button)Master.FindControl("newQuizButton");
if (button != null)
{
button.CssClass = "btn active bg-dark text-light";
}
/* try saving quiz */
try {
if (SaveQuiz(quiz.Value))
{
response.Visible = true;
newQuizForm.Visible = false;
applicationError.Visible = false;
}
else
{
throw new Exception();
}
} catch (Exception)
{
newQuizForm.Visible = false;
response.Visible = false;
applicationError.Visible = true;
}
}
else
{
response.Visible = false; // hide response text
applicationError.Visible = false;
DatabaseEntities db = new DatabaseEntities();
var quizes = db.getQuestionTypes().ToArray();
var visibilities = db.getVisibility().ToArray();
questionType.DataSource = quizes;
questionType.DataBind();
questionType.Value = "Brief";
visibility.DataSource = visibilities;
visibility.DataBind();
visibility.Value = "Public";
/* register client scripts */
Type scriptType = this.GetType();
String scriptName = "script";
String scriptUrl = "./new_quiz.js";
String scriptText = File.ReadAllText(Server.MapPath(scriptUrl));
ClientScriptManager scriptManager = Page.ClientScript;
if (!scriptManager.IsClientScriptBlockRegistered(scriptType, scriptName))
{
scriptManager.RegisterClientScriptBlock(scriptType, scriptName, scriptText, true);
}
if (!string.IsNullOrEmpty(Request.QueryString["quizId"]))
{
try {
var teacherId = Int32.Parse(Session["userId"].ToString());
var quizId = Int32.Parse(Request.QueryString["quizId"]);
var existingQuiz = db.Quiz.Where(q => q.teacherId == teacherId &&
q.id == quizId).Single();
if (existingQuiz.Submission.Count > 0)
{
quizLoadError.InnerText = "Sorry, but this quiz cannot be updated/edited!";
quizLoadError.Visible = true;
newQuizForm.Visible = false;
return;
}
var localQuiz = LocalQuiz.ToLocalQuiz(existingQuiz);
if (localQuiz.visibility == "Public")
{
var blackList = db.Blacklist.Where(b => b.quizId == quizId &&
b.teacherId == teacherId).ToArray();
foreach (var bl in blackList)
{
localQuiz.blackList.Append(bl.email);
}
}
else
{
var whiteList = db.Whitelist.Where(b => b.quizId == quizId &&
b.teacherId == teacherId).ToArray();
foreach (var wl in whiteList)
{
localQuiz.whiteList.Append(wl.email);
}
}
quiz.Value = JsonConvert.SerializeObject(localQuiz);
updateMode.Value = "true";
ViewState["quizId"] = Request.QueryString["quizId"];
} catch (Exception err)
{
quizLoadError.InnerText = "Something went wrong, Unable to load quiz!";
quizLoadError.Visible = true;
newQuizForm.Visible = false;
}
}
}
}
