private void ReceiveCallback(IAsyncResult AR)
{
try
{
int received = clientSocket.EndReceive(AR);
if (received == 0)
{
return;
}
message = Encoding.ASCII.GetString(buffer);
int index = message.IndexOf("}");
message = message.Substring(0, index + 1);
//Check for intial connection reply
if (message.Contains("server_connection"))
{
//ServerMessages serverMessage = JsonConvert.DeserializeObject<ServerMessages>(message);
// Console.WriteLine("Message from the server: " + serverMessage.Message);
buffer = new byte[clientSocket.ReceiveBufferSize];
}
else if (DeserializeJson(message) != null)
{
//deserialize json string into an object
Console.WriteLine(message);
equation = DeserializeJson(message);
Invoke((Action) delegate
{
//update the question text box to show the equation
textBquestion.Text = equation.FirstNumber.ToString() + equation.Symbol + equation.SecondNumber.ToString() + "=";
SubmitButton.Enabled = true;
});
buffer = new byte[clientSocket.ReceiveBufferSize];
}
// Start receiving data again.
clientSocket.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, ReceiveCallback, null);
}
// Avoid catching all exceptions handling in cases like these.
catch (SocketException ex)
{
ShowErrorDialog(ex.Message);
}
catch (ObjectDisposedException ex)
{
ShowErrorDialog(ex.Message);
}
}
private Equations DeserializeJson(string json)
{
//basic function to deserialise a json string
try
{
Equations eq = JsonConvert.DeserializeObject <Equations>(json);
return(eq);
}
catch (Exception ex)
{
Console.WriteLine(ex);
return(null);
}
}
