Data: 07/04/2018

De: Deltaaapppi

Assunto: Ошибка частотника

vb Friend Function WriteToComPort ByVal textToWrite As String As Boolean Dim success As Boolean If myComPort.IsOpen Then 1 Write the passed String to the port. myComPort.Write textToWrite success = True End If Return success End Sub 205 Chapter 10 vc# internal static Boolean WriteToComPort string textToWrite Boolean success; if myComPort.IsOpen // Write the passed String to the port. myComPort.Write textToWrite ; success = true; return success; After calling BeginInvoke, the application’s thread is free to do other things while the write operation is in progress. When the write operation completes, the callback routine executes. The callback routine can perform any actions required after the write operation completes. vb Friend Sub WriteCompleted ByVal ar As IAsyncResult Dim msg As String Dim deleg As WriteToComPortDelegate Dim success As Boolean 1 To obtain the msg value passed to the BeginInvoke method, 1 cast BeginInvoke's IAsyncResult value to an AsyncResult object 1 and get the object's AsyncDelegate property. deleg = DirectCast DirectCast ar, AsyncResult .AsyncDelegate, _ WriteToComPortDelegate 1 The msg value is in the AsyncState property. msg = = DirectCast ar.AsyncState, String 1 The EndInvoke method returns the value returned by WriteToComPort. success = WriteToComPortDelegatel.EndInvoke ar Console.WriteLine "Write operation began: " & msg Console.WriteLinef'Write operation succeeded: " & success End Sub 206 Managing Ports and Transfers in .NET vc# internal static void WriteCompleted IAsyncResult ar String msg; WriteToComPortDelegate deleg; Boolean success; // To obtain the msg value passed to the BeginInvoke method, // cast BeginInvoke's IAsyncResult value to an AsyncResult object // and get the object's AsyncDelegate property. deleg = WriteToComPortDelegate AsyncResult ar .AsyncDelegate; // The msg value is in the AsyncState property. msg = String ar.AsyncState; // The EndInvoke method returns the value returned by WriteToCo prom-electric.ru