/// <summary>
/// Reads the socket.
/// </summary>
/// <param name="obj">The object.</param>
private void readSocket(object obj)
{
//cast the obj which is a clientConnection
ClientConnections connection = obj as ClientConnections;
try
{
//size/data of read
List<byte[]> listObject = new List<byte[]>();
byte[] bytes = new byte[8192];
byte[] fullObjectBytes;
NetworkStream stream = connection.cSocket.GetStream();
//check if connection is still open
if (connection.cSocket.Connected)
{
stream.Read(bytes, 0, bytes.Length);
}
else
{
//stop timer if connection closed
connection.rTimer.stop();
}
listObject.Add(bytes);
//Convert data recived to an object
var bformatter = new BinaryFormatter();
fullObjectBytes = bytes;
Stream fullObjectStream = new MemoryStream(fullObjectBytes);
object objFromClient = bformatter.Deserialize(fullObjectStream);
Type objType = objFromClient.GetType();
byte[] objectOut = new byte[0];//temp- the file data the will be sent to client
if (objType == typeof(String))//client sent name
{
connection.name = ((string)objFromClient);
objectOut = ObjectToByteArray("Connected");
}
else if (objType == typeof(Answer))//client gives you an answer (give them next question or their results)
{
//Send client a question
Answer userAnswer = (Answer)objFromClient;
//check if first question
if (connection.question != -1)
{
List<string> queryRow = db.Select("Select questionNum,question,ans1,ans2,ans3,ans4,correctAnswer from questions where questionNum = " + connection.question).FirstOrDefault();
QACombo QARow = new QACombo(String.Join("|", queryRow));
if (userAnswer.answer == QARow.correctAnswer)
{
connection.score += userAnswer.timeLeft;
}
else
{
userAnswer.timeLeft = 0;
}
//Add users answer/result to results list
connection.results.Add(new Result(QARow.questionNum + "|" + QARow.question + "|" + queryRow[1 + QARow.correctAnswer] + "|" + queryRow[1 + userAnswer.answer]));
db.Insert("INSERT INTO questionattempts (questionId,timeLeft)VALUES(" + QARow.questionNum + "," + userAnswer.timeLeft + ")");
}
//get next question data
List<string> nextQuestion = db.Select("Select questionNum,question,ans1,ans2,ans3,ans4,correctAnswer from questions where questionNum > " + connection.question + " Order By questionNum ASC").FirstOrDefault();
if (nextQuestion != null)
{
//Create object to send to client
QACombo nextQ = new QACombo(String.Join("|", nextQuestion));
objectOut = ObjectToByteArray(nextQ);
connection.question = nextQ.questionNum;
}
else
{
//Add user to leaderboard
db.Insert("INSERT INTO leaderboard (name,score)VALUES('" + connection.name + "'," + connection.score + ")");
objectOut = ObjectToByteArray(connection.results);
}
}
else if (objType == typeof(CurrentStatus))//
{
//List of current connections
List<CurrentStatus> statusList = new List<CurrentStatus>();
foreach (var con in connections)
{
if (con.question != -1)
{
CurrentStatus newStatus;
newStatus.name = con.name;
newStatus.score = con.score;
newStatus.questionNum = con.question;
statusList.Add(newStatus);
}
}
//Send list of current connection to admin
objectOut = ObjectToByteArray(statusList);
}
else if (objType == typeof(Leaderboard))
{
//create leaderboard
List<List<string>> leader = db.Select("Select name, score from leaderboard order by score Desc");
List<Leaderboard> leaderBoard = new List<Leaderboard>();
foreach (var player in leader)
{
Leaderboard newLeaderboard;
newLeaderboard.name = player[0];
newLeaderboard.score = Convert.ToInt16(player[1]);
leaderBoard.Add(newLeaderboard);
}
leaderBoard.OrderBy(o => o.score).ToList();
//Send leaderboard to user
objectOut = ObjectToByteArray(leaderBoard);
}
else if (objType == typeof(ExcelData))
{
//Create excel list for admin
List<ExcelData> excelDataList = new List<ExcelData>();
List<List<string>> excelRecords = db.Select("Select questionId, timeLeft from questionattempts");
List<List<string>> questionData = db.Select("Select questionNum, question from questions");
//Combine questionatttempts and question information to generate fields for excel
foreach (List<string> questionRecord in questionData)
{
int questionNumber = Convert.ToInt16(questionRecord[0]);
string questionText = questionRecord[1];
double avgTime = 0;
int count = 0;
double percentCorrect = 0;
foreach (var excelRecord in excelRecords)
{
if (excelRecord[0] == questionRecord[0])
{
avgTime += Convert.ToDouble(excelRecord[1]);
if (excelRecord[1] != "0")
{
percentCorrect++;
}
count++;
}
}
avgTime = count != 0 ? avgTime /= count : 0;
percentCorrect = count != 0 ? percentCorrect /= count : 0;
percentCorrect *= 100;
excelDataList.Add(new ExcelData(questionNumber, questionText, avgTime, percentCorrect));
}
//Send excel data to admin
objectOut = ObjectToByteArray(excelDataList);
}
else if (objType == typeof(List<QACombo>))
{
//Admin updates the question list
List<QACombo> QAList = (List<QACombo>)objFromClient;
if (QAList.Any())//Admin is changing questions
{
db.Delete("DELETE FROM questions");//Remove all questions
db.Delete("DELETE FROM questionattempts");//remove all questionattempts
//insert all new questions
foreach (var record in QAList)
{
db.Insert("INSERT INTO questions (questionNum,question,ans1,ans2,ans3,ans4,correctAnswer)VALUES(" + record.questionNum + ",'" + record.question + "','" + record.ans1 + "','" + record.ans2 + "','" + record.ans3 + "','" + record.ans4 + "'," + record.correctAnswer + ")");
}
}
else//Read all questions
{
List<QACombo> send = new List<QACombo>();
List<List<string>> thisQuestion = db.Select("Select questionNum,question,ans1,ans2,ans3,ans4,correctAnswer from questions");
foreach (List<string> record in thisQuestion)
{
send.Add(new QACombo(String.Join("|", record)));
}
//Send all questions to admin
objectOut = ObjectToByteArray(send);
}
}
//Send the data to the client
stream.Write(objectOut, 0, objectOut.Length);
}
catch (IOException e)
{
connection.cSocket.Close();
connection.rTimer.stop();
}
catch (SerializationException e)
{
connection.cSocket.Close();
connection.rTimer.stop();
}
finally
{
for (int i = 0; i < connections.Count; i++)
{
//Check if any clients have disconnected from the server
if (connections[i].cSocket.Connected == false)
{
//Remove the client from running clients list
connections.RemoveAt(i);
}
}
}
}
/// <summary>
/// Handles the Click event of the btnSave control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
private void btnSave_Click(object sender, EventArgs e)
{
if (txtQuestion.Text != "" & txtAns1.Text != "" & txtAns2.Text != "" & txtAns3.Text != "" & txtAns4.Text != "" & (cbAns_1.Checked | cbAns_2.Checked | cbAns_3.Checked | cbAns_4.Checked))
{ //if none of the fields are blank
if (!txtQuestion.Text.Contains('|') & !txtAns1.Text.Contains('|') & !txtAns2.Text.Contains('|') & !txtAns3.Text.Contains('|') & !txtAns4.Text.Contains('|'))
{ //if none of the fields contain a pipe symbol
int qid = (lbQuestions.SelectedIndex == -1) ? 0 : lbQuestions.SelectedIndex; //if the question id is -1, sets to 0
if (qid == 0)
{ //make a new question
currentQA = new QACombo(Convert.ToString(GetLowestQNumber()) + "|" + txtQuestion.Text + "|" + txtAns1.Text + "|" + txtAns2.Text + "|" + txtAns3.Text + "|" + txtAns4.Text + "|" + (cbAns_1.Checked == true ? 1 : cbAns_2.Checked == true ? 2 : cbAns_3.Checked == true ? 3 : 4));
questionsList.Add(currentQA);
lbQuestions.Items.Add(currentQA.question);
}
else
{ //edit an older question
currentQA = questionsList.ElementAt(qid - 1);
currentQA.question = txtQuestion.Text;
currentQA.ans1 = txtAns1.Text;
currentQA.ans2 = txtAns2.Text;
currentQA.ans3 = txtAns3.Text;
currentQA.ans4 = txtAns4.Text;
currentQA.correctAnswer = (cbAns_1.Checked == true ? 1 : cbAns_2.Checked == true ? 2 : cbAns_3.Checked == true ? 3 : 4);
lbQuestions.Items.RemoveAt(qid); //remove the older question
lbQuestions.Items.Add(currentQA.question); //add the new question
clearFields();
}
MessageBox.Show("Saved the question!");
}
else
{
MessageBox.Show("Question not saved, invalid characters found in a text box. (No '|' allowed.)");
}
}
else
{
MessageBox.Show("Question not saved. Must complete all fields.");
}
}
/// <summary>
/// Handles the SelectedIndexChanged event of the lbQuestions control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
private void lbQuestions_SelectedIndexChanged(object sender, EventArgs e)
{
if(lbQuestions.SelectedItem != null) {
string questionText = lbQuestions.SelectedItem.ToString(); //gets the text of the question
if (questionText == "Add a new question...")
{
clearFields(); //clears all fields so a new question can be made
}
else
{
currentQA = questionsList.ElementAt((lbQuestions.SelectedIndex) - 1); //get the question from the question list
txtQuestion.Text = currentQA.question; //set all the text
txtAns1.Text = currentQA.ans1;
txtAns2.Text = currentQA.ans2;
txtAns3.Text = currentQA.ans3;
txtAns4.Text = currentQA.ans4;
switch ((checkBoxes)currentQA.correctAnswer)
{ //set the checkbox
case checkBoxes.ANS_ONE:
cbAns_1.Checked = true;
break;
case checkBoxes.ANS_TWO:
cbAns_2.Checked = true;
break;
case checkBoxes.ANS_THREE:
cbAns_3.Checked = true;
break;
case checkBoxes.ANS_FOUR:
cbAns_4.Checked = true;
break;
}
uncheckOthers((checkBoxes)currentQA.correctAnswer);
}
}
}
/// <summary>
/// Gets the next question.
/// </summary>
public void GetNextQuestion()
{
lblQuestionText.Text = "Getting new question...";
try //to get a new question
{
tmrTimeLeft.Enabled = false;
//Int32 port = Convert.ToInt32(portStr);
//client = new TcpClient(server, port);
Answer ans = new Answer();
ans.answer = cbAnswer_1.Checked == true ? 1 : cbAnswer_2.Checked == true ? 2 : cbAnswer_3.Checked == true ? 3 : 4;
ans.question = questionNumber;
ans.timeLeft = Convert.ToInt32(lblTimeLeft.Text);
Byte[] data = ObjectToByteArray(ans);
stream = host.GetStream();
stream.Write(data, 0, data.Length); //send our answer
List<byte[]> listObject = new List<byte[]>();
byte[] bytes = new byte[8192];
byte[] fullObjectBytes;
stream.Read(bytes, 0, bytes.Length); //get a new question or the end of game
listObject.Add(bytes);
var bformatter = new BinaryFormatter();
fullObjectBytes = bytes;
Stream fullObjectStream = new MemoryStream(fullObjectBytes);
object objFromServer = bformatter.Deserialize(fullObjectStream);
Type objType = objFromServer.GetType();
if (objType == typeof(QACombo)) //if new question
{
currentQA = (QACombo)objFromServer;
setQAText();
tmrTimeLeft.Enabled = true;
}
else if (objType == typeof(List<Result>)) //if results(end of game)
{
pAnswers.Visible = false;
pQuestions.Visible = false;
pEndQuestions.Visible = true;
pTimeLeft.Visible = false;
pStartScreen.Visible = false;
btnSubmit.Visible = false;
List<Result> results = (List<Result>)objFromServer;
foreach (var result in results)
{ //print results
txtResults.Text += "\r\n#" + result.questionNumber + "\r\nQuestion: " + result.question + "\r\n Your answer: " + result.theirAnswer + "\r\n Correct answer: " + result.actualAnswer;
}
data = ObjectToByteArray(new Leaderboard());
stream.Write(data, 0, data.Length); //send blank leaderboard
stream.Read(bytes, 0, bytes.Length); //receive leaderboard with data
listObject.Add(bytes);
fullObjectBytes = bytes;
fullObjectStream = new MemoryStream(fullObjectBytes);
objFromServer = bformatter.Deserialize(fullObjectStream);
objType = objFromServer.GetType();
txtResults.Clear();
List<Leaderboard> leaderboards = (List<Leaderboard>)objFromServer;
int count = 1;
foreach (var leaderboard in leaderboards)
{ //print leaderboard
txtResults.Text += "#" + count++ + " " + leaderboard.name + " " + leaderboard.score + "\r\n";
}
}
}
catch (ArgumentNullException ex)
{
MessageBox.Show("InvalidOperationException: {0}", ex.Message);
Console.WriteLine("ArgumentNullException: {0}", ex);
stream.Close();
this.Close();
}
catch (SocketException ex)
{
MessageBox.Show("InvalidOperationException: {0}", ex.Message);
Console.WriteLine("SocketException: {0}", ex);
stream.Close();
this.Close();
}
catch (IOException ex)
{
MessageBox.Show("InvalidOperationException: {0}", ex.Message);
Console.WriteLine("IOException: {0}", ex);
stream.Close();
this.Close();
}
catch (SerializationException ex)
{
MessageBox.Show("InvalidOperationException: {0}", ex.Message);
Console.WriteLine("SerializationException: {0}", ex);
stream.Close();
this.Close();
}
catch (InvalidOperationException ex)
{
MessageBox.Show("InvalidOperationException: {0}", ex.Message);
Console.WriteLine("InvalidOperationException: {0}", ex);
stream.Close();
this.Close();
}
lblTimeLeft.Text = "20";
tmrTimeLeft.Enabled = true;
}
