private void btn_Logout_Click(object sender, EventArgs e)
{
try
{
//Fill the info for the message to be send
Data msgToSend = new Data();
msgToSend.Name = strName;
msgToSend.Message = " ";
msgToSend.cmd = Command.Logout;
byte[] byteData = msgToSend.ConvertToByte();
//Send it to the server
clientSocket.BeginSend(byteData, 0, byteData.Length, SocketFlags.None, new AsyncCallback(Send_Callback), null);
clientSocket.Close();
//clsoing form
FormCloseFlag = true;
this.Close();
}
catch (Exception)
{
MessageBox.Show("Unable to send message to the server.", "Client Error: " + strName, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
void sendPrice(string Price)
{
try
{
//Fill the info for the message to be send
Data msgToSend = new Data();
msgToSend.Name = strName;
msgToSend.Message = Price;
msgToSend.cmd = Command.Message;
byte[] byteData = msgToSend.ConvertToByte();
//Send it to the server
clientSocket.BeginSend(byteData, 0, byteData.Length, SocketFlags.None, new AsyncCallback(Send_Callback), null);
}
catch (Exception)
{
MessageBox.Show("Unable to send message to the server.", "CLient: " + strName, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void MainForm_Load(object sender, EventArgs e)
{
this.Text = "Client: " + strName;
//The user has logged into the system so we now request the server to send
//the names of all users who are in the chat room
Data msgToSend = new Data();
msgToSend.cmd = Command.List;
msgToSend.Name = strName;
msgToSend.Message = null;
byteData = msgToSend.ConvertToByte();
clientSocket.BeginSend(byteData, 0, byteData.Length, SocketFlags.None, new AsyncCallback(Send_Callback), null);
byteData = new byte[1024];
//Start listening to the data asynchronously
clientSocket.BeginReceive(byteData, 0, byteData.Length, SocketFlags.None, new AsyncCallback(Receive_Callback), null);
}
private void Connect_Callback(IAsyncResult ar)
{
try
{
clientSocket.EndConnect(ar);
//We are connected so we login into the server
Data msgToSend = new Data();
msgToSend.cmd = Command.Login;
msgToSend.Name = txtName.Text;
msgToSend.Message = null;
byte[] b = msgToSend.ConvertToByte();
//Send the message to the server
clientSocket.BeginSend(b, 0, b.Length, SocketFlags.None, new AsyncCallback(Send_Callback), null);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Client Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void Receive_Callback(IAsyncResult ar)
{
try
{
clientSocket.EndReceive(ar);
Data msgReceived = new Data(byteData);
//servr will send msg to client to logout if the there
//was no room for new client
if (msgReceived.Message == "Logout")
{
//Fill the info for the message to be send
Data msgToSend = new Data();
msgToSend.Name = strName;
msgToSend.Message = " ";
msgToSend.cmd = Command.Logout;
byte[] byteData = msgToSend.ConvertToByte();
//Send it to the server
clientSocket.BeginSend(byteData, 0, byteData.Length, SocketFlags.None, new AsyncCallback(Send_Callback), null);
clientSocket.Close();
FormCloseFlag = true;
this.Close();
} //below else block will run if server log out
else if (msgReceived.Message == "ServerLogOut")
{
clientSocket.Close();
this.Close();
}
//Accordingly process the message received
switch (msgReceived.cmd)
{
case Command.Login:
lstChatters.Items.Add(msgReceived.Name);
break;
case Command.Logout:
lstChatters.Items.Remove(msgReceived.Name);
break;
case Command.Message:
break;
case Command.List:
lstChatters.Items.AddRange(msgReceived.Message.Split('*'));
lstChatters.Items.RemoveAt(lstChatters.Items.Count - 1);
txtChatBox.Text += "<<<" + strName + " has joined the room>>>\r\n";
break;
case Command.Result:
try
{
string[] arr = new string[2];
arr = msgReceived.Message.Split(',');
this.BeginInvoke((MethodInvoker) delegate()
{
txtChatBox.Text += " Mobile Name: " + arr[0] + " Client ID " + arr[1];
});
int client_Id = Convert.ToInt16(arr[1]);
sendPrice(product.FindMin(arr[0], client_Id).ToString());
}
catch (Exception)
{
sendPrice("-1");
}
break;
}
if (msgReceived.Message != null && msgReceived.cmd != Command.List)
{
txtChatBox.Text += msgReceived.Message + "\r\n";
}
byteData = new byte[1024];
clientSocket.BeginReceive(byteData, 0, byteData.Length, SocketFlags.None, new AsyncCallback(Receive_Callback), null);
}
catch (ObjectDisposedException)
{ }
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Client Ka error: " + strName, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}