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COM-ports to Delphi

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Cleofas last edited by

Someone can lay down a resource, a source. COMports in business? I'd like to see how to get the files through the ports.
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chanisef last edited by

As I recall, the treatment of COM ports in Windows goes through the same API as the file.CreateFile♪ CloseHandle♪ WriteFile etc.). I used to use a book. http://www.bhv.ru/books/book.php?id=2732 , there's a lot of originals and just Delphi.
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Problems printing FastReport
Software Programming • delphi impression fast reports • • Avante

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I couldn't solve my problem of printing directly on the printer, in my opinion it should be some problem on the printer, but I can't say for sure, because I don't have another PC or printer to test. My settings: Windows 8.1, Delphi 2010 and HP printer. I will use doPDF to resolve my problem according to friend Victor's comment.
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What are the consequences of exiting the system without closing the tables?
Software Programming • delphi • • Duquan

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Do not corrupt the bank, but if any operation remains active, you can leave the bank with lock, "locked" for other operations in the same table/register.This type of behavior varies from one database to another, so it is a good practice to allocate resources, close connections through resource protection structures like try finally
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not compiling port.cpp
Software Programming • c++ • • kalena

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The assembler box is written incorrectly - there are no closing brackets.And it's best not to save on the lines, but to write normally:void Port8Bit::Write(uint8_t data) { __asm__ volatile ( "outb %0, %1" : : "a" (data), "Nd" (portnumber) ); }
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delphi, class, delete
Software Programming • delphi classes • • chanisef

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TMyF = class public i: integer; s: string; My: TMy; constructor Create(aMy: TMy); destructor Destroy; override; end; constructor TMyF.Create(aMy: TMy); begin inherited Create; My := aMy; end; destructor TMyF.Destroy; begin My.Free; inherited; end; MyF := TMyF.Create(TMy.Create); try ... finally MyF.Free; end; Addendum from @kami:Prevention: The proposed implementation of the designer shall be used only if the facility is created TMyF becomes the owner of the facility transferred to him TMy♪
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Port open check
Software Programming • java • • fbio

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Not really. ConnectExceptionCould be a quantum in case IP is wrong. A SocketTimeoutException Could be kinuto if the road stopped firewal, and when there's a problem with the routing.In short, the question is, how accurate diagnosis is required, that is, how accurate it is to be divided wrong addresswrong portRatting issuesfirewallIn short, for the first approach, you can really try to connect and, if the exception goes down, diagnose the closed port. But for more accurate diagnosis, you need to try ping.InetAddress.getByName(ipAddress).isReachable()) If, for example, ping is working, but not connected to a particular port, the port is likely to be closed.
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Coding memo / DelphiXE
Software Programming • delphi coding • • guilherme

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Var FileIn: TStringList; begin // Если память выделить не удастся, то будет исключение FileIn := TStringList.Create; Try //Тут могут быть исключения, например файл отсутствует FileIn.LoadFromFile('FileName', TEncoding.FANSIEncoding);//<< Выбираете верную кодировку файла FileIn.Text := StringReplace(FileIn.Text, frm_Main.ReplaceList[j][0], frm_Main.ReplaceList[j], indexR, [rfReplaceAll, rfIgnoreCase]); FileIn.SaveToFile('FileName', TEncoding.FANSIEncoding);//<< Выбираете НУЖНУЮ кодировку файла Finally FileIn.Free; //Святое, чистим память, за нас ее в делфи никто не почистит end; end; As a result, there will be a replacement in the Delphi code, with the possibility of keeping your code in the file.
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PHP for reading com port?
Software Programming • php • • Kadir

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Conclusion of the full packageecho $serial->readPort(); Bait withdrawalwhile (true) { echo $serial->readPort(1); }
What is the difference between GetCurrentProcess and GetCurrentProcessID?
Software Programming • delphi proc languageess • • jeanid

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How the name says the https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getcurrentprocess?WT.mc_id=DOP-MVP-5002397 obtain the process itself, i.e. a handler for the process. You will use this handler to perform actions or get process information.And also as the name says the https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getcurrentprocessid?WT.mc_id=DOP-MVP-5002397 take the process identifier, i.e. takes the process number and nothing else. It is just a number that identifies the process but it is not the process.Unless Delphi has two forms https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-openprocess?WT.mc_id=DOP-MVP-5002397 Microsoft API original is waiting for ID, so only the second should work. And even if you have how to use the handler beyond the ID or that they end up confusing, both should work.It may not be that the ID is coming properly for some reason I don't know, maybe it only works in some contexts. You tried it. https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getwindowthreadprocessid?WT.mc_id=DOP-MVP-5002397
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Delphi file disposal
Software Programming • delphi • • juvenalb

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Function DeleteFile Removes the file by name. FileName♪function DeleteFile ( const FileName : string ) : Boolean;
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Use of CallBack in Delphi
Software Programming • delphi xe3 datasnap • • Jolied

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I found a http://www.andreanolanusse.com/pt/utilizando-callback-em-datasnap-2010/ very complete on the blog of Andreano Lanusse. When we have a client-server call involving some type of processing we use Callback so that the server sends the processing status to the client. That said, you should follow the following steps:1- Implement the Method server. This server method receives a TDBXCallBack as parameter. In the blog Andreano made a server method that performs the backup of a database, returning to the client the last line of the table that was processed: procedure TDSServerBatch.StartBackup(sMessage: TDBXCallback; sBackupFileName: String); var LCallbackValue: TJSONObject; db: String; begin db := DMServerContainer.GetEmployeeDBName; srvBackup.DatabaseName := Copy(db, Pos(':', db) + 1, Length(db)); srvBackup.Attach; srvBackup.BackupFile.Add(sBackupFileName); srvBackup.ServiceStart; if srvBackup.Verbose then while not srvBackup.Eof do begin // if srvBackup.IsServiceRunning then begin LCallbackValue := TJSONObject.Create; LCallbackValue.AddPair(TJSONPair.Create('Server return', srvBackup.GetNextLine)); sMessage.Execute(LCallbackValue); end; end; if srvBackup.Active then srvBackup.Detach(); end; 2- Implement the client-side.I find it interesting to use anonymous methods for the callback. Why? I explain: By using anonymous methods the callback reference to be executed will be passed from server to client, whenever one of your server method runs. Follow the example below:type TDSCallbackMethod = reference to function(const Args: TJSONValue): TJSONValue; TMessageCallback = class(TDBXCallback) private FCallBackMethod: TDSCallbackMethod; public constructor Create(CallBackMethod: TDSCallbackMethod); function Execute(const Arg: TJSONValue): TJSONValue; override; end; implementation constructor TMessageCallback.Create(CallBackMethod: TDSCallbackMethod); begin FCallBackMethod := CallBackMethod; end; function TMessageCallback.Execute(const Arg: TJSONValue): TJSONValue; begin Result := FCallbackMethod(Arg); end; 3-1998, point 1.3.2 To run the server method you just need to do this://Declarar seu callback (Usei Métodos Anônimos) callback := TMessageCallback.Create( function(const Args: TJSONValue) : TJSONValue; //No caso, s é do tipo TDSServerBatchClient, que seria seu proxy em questão. s := TDSServerBatchClient.Create(DMClientContainer.MyDSServer.DBXConnection); s.StartBackup(callback, 'mybackup.ibk'); P.S.: Just to conclude, this response was based on the material taken from the blog. I wrote it only to have a reference here on the site that does not depend on the link. I suggest you read the post in integrate for better conclusions.
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Setar font color in cell in BrOffice
Software Programming • delphi • • Oba22

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It is really necessary to convert color, try with this function:function SwapColor(nColor: TColor): TColor; var c1, c2, c3: byte; begin c1 := (nColor and $000000FF); // $..0000FF c2 := (nColor and $0000FF00) shr 8; // $..00FF00 c3 := (nColor and $00FF0000) shr 16; // $..FF0000 result := (c1 shl 16) + (c2 shl 8) + c3; end; Take a look at these links: http://www.planetadelphi.com.br/artigo/162/delphi-e-openoffice(broffice)---parte-3 https://github.com/sergio-hcsoft/Delphi-SpreadSheets
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Determine the code
Software Programming • delphi delphi 7 coding • • obi

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Actually, there are no universal ways. But it can help.I also often use decoder: http://www.artlebedev.ru/tools/decoder/ It's not the only website. According to him,просто текст -- АлександрЪ??? Quoted-printable circle KOI8-R
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How do you copy in Instagram.com?
Software Programming • c sharp instagram repeat • • gionna

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Frankly speaking, with the shape and all the emotions of pressurizing the button seems dubious and rather cunning. The instagram has its own API, which allows for all actions, including, of course, authentication. Details http://instagram.com/developer/authentication/
How to Know if Form is the son of a TPanel is open
Software Programming • delphi delphi 10 • • emmalee

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Press Alt+P+V delete the form that it includes automatically, something like: Application.CreateForm(TForm2, Form2);This logical test:if not(Assigned(Form2)) thenIn the documentation explains that Assignedmay not represent the state of existence of the object, if it is = nil.The correct is to test whether it is = or different <> nilif Form2 = nil thenNow, what's really wrong is class manipulation, you're using Form2 directly from the class TForm2. It works, but it's not right.The correct is that you declare a variable there in { Private declarations } type TForm2 and from this control their existence.if vForm = nil then begin vForm := TForm2.Create(Self); vForm .Parent := Panel1; end; vForm .Show;
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Image, delphi
Software Programming • delphi • • Amritpal

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Since you don't give examples of your code, I'll try to tell one of the possible directions.Create a DLL with the resources of which your pictures will be stored and download them from there. And look at MSDN like LoadResource LoadBitmap LoadImage. ♪ ♪Use the blob database file to store the drawings. Like Access.Use the archive file like zip or rar for storage. There's a lot to do with the archives or use the dll function as proposed by RAR.Develop your data storage structure to store information on the number of images and stores on the file.

COM-ports to Delphi

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