I'm making a flight controller program in C# and this receives data function, the program will run as intended for around 2 minutes before the program crashes and returns the error invalid JSON primitive. I've tried googling around and can't find anything about my issue, as I can't see any problems with the program. The function that deserializes the JSON is here, this is also the line that causes the error and returns the invalid JSON primitive message.
void ReceiveData() //This function is used to listen for messages from the flight simulator
{
while (true)
{
NetworkStream stream = client.GetStream(); //sets the network stream to the client's stream
byte[] buffer = new byte[256]; //Defines the max amount of bytes that can be sent
int bytesRead = stream.Read(buffer, 0, buffer.Length);
if (bytesRead > 0)
{
string jsonreceived = Encoding.ASCII.GetString(buffer, 0, bytesRead); //Converts the received data into ASCII for the json variable
JavaScriptSerializer Deserializer = new JavaScriptSerializer();
TelemetryUpdate telemetry = Deserializer.Deserialize<TelemetryUpdate>(jsonreceived);
this.Invoke(new Action(() => { TelemetryReceivedLabel.Text = jsonreceived; })) ;
Updatelabels(telemetry); //runs the update labels function with the telemetry data as an argument
lock (@"c:\temp\BlackBox.txt")
{
File.AppendAllText(@"c:\temp\BlackBox.txt", "Data Received" + jsonreceived + DateTime.Now.ToString("h:mm:ss tt") + Environment.NewLine); //this appends the json data to the blackbox file
}
}
}
}
The program works completely fine and passes information into variables how I want it too like this I have logged the JSON data t check if the variable names match etc. they all fit correctly.
void Updatelabels(TelemetryUpdate telemetry) //this function updates all the labels with received data
{
if (this.InvokeRequired) //invokes the telemetryupdatedelegate
{
this.Invoke(new TelemetryUpdateDelegate(Updatelabels), telemetry);
return;
}
altitudelabel.Text = string.Format("{0:0.00}", telemetry.Altitude);
speedlabel.Text = string.Format("{0:0.00}", telemetry.Speed);
pitchlabel.Text = string.Format("{0:0.00}", telemetry.Pitch);
verticalspeedlabel.Text = string.Format("{0:0.00}", telemetry.VerticalSpeed);
throttlelabel.Text = string.Format("{0:0.00}", telemetry.Throttle);
elevatorspeedlabel.Text = string.Format("{0:0.00}", telemetry.ElevatorPitch);
WarningUpdateEvent?.Invoke(telemetry); //invokes the warning update event
ReceivedDataGrid.Rows.Insert(0,telemetry.Altitude, telemetry.Speed, telemetry.Pitch, telemetry.VerticalSpeed, telemetry.Throttle, telemetry.ElevatorPitch, telemetry.WarningCode); //populates the datagrid with the received data
ReceivedDataGrid.AutoResizeColumns(); //resizes the columns to fit properly
}
