/// <summary>
/// Query the current port's capabilities without accessing it. You can only call the Close()
/// method after reading the capabilities. This method does neither initialize nor Open() the
/// port.
/// </summary>
///
/// <example>
///
/// </example>
public bool Query()
{
if (isOpen)
{
return(false);
}
hPort = m_CommAPI.QueryFile(portName);
if (hPort == (IntPtr)CommAPI.INVALID_HANDLE_VALUE)
{
int e = Marshal.GetLastWin32Error();
if (e == (int)APIErrors.ERROR_ACCESS_DENIED)
{
// port is unavailable
return(false);
}
// ClearCommError failed!
string error = String.Format("CreateFile Failed: {0}", e);
throw new CommPortException(error);
}
// read the port's capabilities
bool status = GetPortProperties();
return(true);
}
/// <summary>
/// Query the current port's capabilities without accessing it. You can only call the Close()
/// method after reading the capabilities. This method does neither initialize nor Open() the
/// port.
/// </summary>
///
/// <example>
///
/// </example>
public bool Query()
{
if (isOpen)
{
return(false);
}
hPort = m_CommAPI.QueryFile(portName);
if (hPort == (IntPtr)CommAPI.INVALID_HANDLE_VALUE)
{
int e = Marshal.GetLastWin32Error();
if (e == (int)APIErrors.ERROR_ACCESS_DENIED)
{
// port is unavailable
return(false);
}
string errorMessage = new Win32Exception(Marshal.GetLastWin32Error()).Message;
Console.WriteLine(errorMessage);
string error = "CreateFile Failed: " + errorMessage;
throw new CommPortException(error);
}
// read the port's capabilities
bool status = GetPortProperties();
return(true);
}