How to wait for data on a COM port - c++

Question

I am using .Net framework's SerialPort class (System.IO.Ports) and am trying to wait to receive data. I've looked around and the WaitCommEvent function seems to be what people suggest using, however it expects a HANDLE as the first parameter. I would like to know either how to get a handle from the SerialPort or a different way to wait for data compatible with the SerialPort class.

Answer 1

The SerialPort class has a DataReceived event:
Indicates that data has been received through a port represented by the SerialPort object.
The documentation provides the following C++/CLI example:
#using <System.dll>
using namespace System;
using namespace System::IO::Ports;
ref class PortDataReceived
{
public:
static void Main()
{
SerialPort^ mySerialPort = gcnew SerialPort("COM1");
mySerialPort->BaudRate = 9600;
mySerialPort->Parity = Parity::None;
mySerialPort->StopBits = StopBits::One;
mySerialPort->DataBits = 8;
mySerialPort->Handshake = Handshake::None;
mySerialPort->RtsEnable = true;
mySerialPort->DataReceived += gcnew SerialDataReceivedEventHandler(DataReceivedHandler);
mySerialPort->Open();
Console::WriteLine("Press any key to continue...");
Console::WriteLine();
Console::ReadKey();
mySerialPort->Close();
}
private:
static void DataReceivedHandler(
Object^ sender,
SerialDataReceivedEventArgs^ e)
{
SerialPort^ sp = (SerialPort^)sender;
String^ indata = sp->ReadExisting();
Console::WriteLine("Data Received:");
Console::Write(indata);
}
};
int main()
{
PortDataReceived::Main();
}