private void msg()
{
if (this.InvokeRequired)
{
this.Invoke(new MethodInvoker(msg));
}
else
{
switch (msgReceived.cmd)
{
case Command.JoinRequestAccepted:
lblRemote.Text = msgReceived.senderName;
break;
case Command.Join:
lstBoxStudents.Items.Add(msgReceived.senderName);
break;
case Command.Leave:
lstBoxStudents.Items.Remove(msgReceived.senderName);
break;
case Command.QuestionRequstAccepted:
dlgAskingQuestion = DialogResult.None;
using (new TimedDialog(30000))
{
dlgAskingQuestion = MessageBox.Show("Your question request has been accepted\nClick OK button to start asking your question", "VCES", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
}
Data data = new Data();
data.userName = lblUser.Text;
if (dlgAskingQuestion == DialogResult.OK)
{
data.cmd = Command.AskingQuestionStart;
serverStream.Write(data.ToByte(), 0, data.ToByte().Length);
serverStream.Flush();
if (!timer1.Enabled)
{
timer1.Enabled = true;
}
}
else if (dlgAskingQuestion == DialogResult.Cancel)
{
data.cmd = Command.AskingQuestionCancel;
serverStream.Write(data.ToByte(), 0, data.ToByte().Length);
serverStream.Flush();
}
else
{
data.cmd = Command.AskingQuestionCancel;
serverStream.Write(data.ToByte(), 0, data.ToByte().Length);
serverStream.Flush();
MessageBox.Show("Your question asking time of 30 seconds is over\nYou cannot continue asking this question.\n\nTo send the request again, use 'Question Request' button.", "VCES - Question Time out", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
btnQuestionRequest.Enabled = true;
}
break;
case Command.AskingQuestionStart:
picBoxStudent.Visible = true;
break;
case Command.AskingQuestionStop:
picBoxStudent.Visible = false;
if (timer1.Enabled)
{
timer1.Enabled = false;
}
if (threadAudioSend.IsAlive)
{
audioSend = false;
//udpAudioSending.Close();
//threadAudioSend.Abort();
}
btnQuestionRequest.Enabled = true;
break;
case Command.LectureEnded:
picBoxTeacher.Image = Image.FromFile("NUMLLOGO.jpg");
break;
case Command.TextMessage:
rtChat.Text = rtChat.Text + Environment.NewLine + msgReceived.senderName + " >> " + msgReceived.chatText + Environment.NewLine;
break;
}
}
}
private void btnJoinLeave_Click(object sender, EventArgs e)
{
if (btnJoinLeave.Text.Equals("Join"))
{
btnJoinLeave.Enabled = false;
if (!connectToServer())
{
if (MessageBox.Show("Server User is not online right now!", "Server not responding", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error) == DialogResult.Retry)
{
btnJoinLeave_Click(sender, e);
return;
}
else
{
btnJoinLeave.Enabled = true;
return;
}
}
Thread text = new Thread(messageReceived);
text.Start();
Data data = new Data();
data.cmd = Command.Join;
data.userName = lblUser.Text;
byte[] outStream = data.ToByte();
serverStream.Write(outStream, 0, outStream.Length);
serverStream.Flush();
btnJoinLeave.Text = "Leave";
btnJoinLeave.Enabled = true;
btnQuestionRequest.Enabled = true;
btnSend.Enabled = true;
}
else if (btnJoinLeave.Text.Equals("Leave"))
{
if (MessageBox.Show("Are you sure to leave the room", "Leave confirmation", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
if (tcpClientForStudent.Connected)
{
Data data = new Data();
data.cmd = Command.Leave;
data.userName = lblUser.Text;
byte[] outStream = data.ToByte();
serverStream.Write(outStream, 0, outStream.Length);
serverStream.Flush();
tcpClientForStudent.Close();
udpAudioReceiving.Close();
}
sin = new SignIn();
sin.txtVCESName.Text = lblUser.Text;
this.Dispose();
this.Hide();
sin.Show();
sin.txtPassword.Focus();
}
}
}