The web application that I am developing right now has something called quiz engine which provides users with short quizzes which consist of one question or more. Now, I have a problem with the RESULTS page that shows in a GridView the
Question Number, User’s Answer and Result. Also this page shows in a DetailsView the Question, four possible answers, correct answer and the answer explanation. The main problem that I have is following:
I set the Correct Answer in the database to nvarchar datatype. and I listed the possble answers as A, B, C and D when the user chooses one of them (for example C), the GridView will show the result (the user’s answer) as a number which is 3 not as a letter, while the DetailsView will show the Correct Answer as C. I don’t know why.
For creating the Quiz engine, I used the Toturial in the ASP.NET website for creating it.
My ASP.NET code:
<asp:GridView ID="resultGrid" runat="server" DataKeyNames="QuestionID" SelectedIndex="0"
AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" AutoGenerateSelectButton="True" OnSelectedIndexChanged="resultGrid_SelectedIndexChanged" Width="555px">
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" CssClass="generaltext" HorizontalAlign="Center" />
<Columns>
<asp:BoundField DataField="QuestionID" HeaderText="Question" />
<%--<asp:BoundField DataField="CorrectAnswer" HeaderText="Correct Answer" />--%>
<asp:BoundField DataField="UserAnswer" HeaderText="Your Answer" />
<asp:BoundField DataField="Result" HeaderText="Result" />
</Columns>
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" CssClass="boldtext" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
SelectCommand="SELECT [Question], [Answer1], [Answer2], [Answer3], [QuestionID], [QuestionOrder], [Answer4], [CorrectAnswer], [AnswerExplanation], [QuizID] FROM [Question] WHERE ([QuizID] = @QuizID) ORDER BY [QuestionOrder]">
<SelectParameters>
<asp:SessionParameter Name="QuizID" SessionField="QuizID" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
<asp:DetailsView ID="answerDetails" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" Height="45px" Width="552px" DataSourceID="SqlDataSource1"
AutoGenerateRows="False" DataKeyNames="QuestionID">
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<CommandRowStyle BackColor="#E2DED6" Font-Bold="True" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" CssClass="generaltext" />
<FieldHeaderStyle BackColor="#E9ECF1" Font-Bold="True" CssClass="boldtext" Width="100px" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Fields>
<asp:BoundField DataField="Question" HeaderText="Question"
SortExpression="Question" />
<asp:BoundField DataField="Answer1" HeaderText="A"
SortExpression="Answer1" />
<asp:BoundField DataField="Answer2" HeaderText="B"
SortExpression="Answer2" />
<asp:BoundField DataField="Answer3" HeaderText="C"
SortExpression="Answer3" />
<asp:BoundField DataField="Answer4" HeaderText="D"
SortExpression="Answer4" />
<asp:BoundField DataField="CorrectAnswer" HeaderText="Correct Answer"
SortExpression="CorrectAnswer" HeaderStyle-BackColor="lightgreen" />
<asp:BoundField DataField="AnswerExplanation" HeaderText="Explanation"
SortExpression="AnswerExplanation" HeaderStyle-BackColor="lightgreen" />
</Fields>
</asp:DetailsView>
My code-behind:
protected void Page_Load(object sender, EventArgs e)
{
ArrayList al = (ArrayList)Session["AnswerList"];
if (al == null)
{
Response.Redirect("default.aspx");
}
resultGrid.DataSource = al;
resultGrid.DataBind();
// Save the results into the database.
if (IsPostBack == false)
{
// Calculate score
double questions = al.Count;
double correct = 0.0;
for (int i = 0; i < al.Count; i++)
{
Answer a = (Answer)al[i];
if (a.Result == Answer.ResultValue.Correct)
correct++;
}
double score = (correct / questions) * 100;
string username = HttpContext.Current.User.Identity.Name.ToString().Replace("ARAMCO\\", "");
SqlDataSource userQuizDataSource = new SqlDataSource();
userQuizDataSource.ConnectionString = ConfigurationManager.ConnectionStrings["testConnectionString"].ToString();
userQuizDataSource.InsertCommand = "INSERT INTO [UserQuiz] ([QuizID], [DateTimeComplete], [Score], [Username]) VALUES (@QuizID, @DateTimeComplete, @Score, @Username)";
userQuizDataSource.InsertParameters.Add("QuizID", Session["QuizID"].ToString());
userQuizDataSource.InsertParameters.Add("DateTimeComplete", DateTime.Now.ToString());
userQuizDataSource.InsertParameters.Add("Score", score.ToString());
userQuizDataSource.InsertParameters.Add("Username", username);
int rowsAffected = userQuizDataSource.Insert();
if (rowsAffected == 0)
{
// Let's just notify that the insertion didn't
// work, but let' s continue on ...
errorLabel.Text = "There was a problem saving your quiz results into our database. Therefore, the results from this quiz will not be displayed on the list on the main menu.";
}
}
}
protected void resultGrid_SelectedIndexChanged(object sender, EventArgs e)
{
SqlDataSource1.FilterExpression = "QuestionOrder=" + resultGrid.SelectedValue;
}
SO HOW TO FIX THIS PROBLEM?
You have to fetch all question and Answer in One datatable/ Array List.
And then bind it in form one by one. Suppose you are in First question and it’s Correct answer is D then and user select B that time flag for first question is false. And if it’s answer is correct then set flag to true. do this process in all question. After finishing exam you can create result using that flag.