Solved

File Execution ...

Posted on 2000-03-29
2
173 Views
Last Modified: 2010-04-04
By using << ShellExecute >> function it have run 3 executable files. But it get executated one by one. It does not wait till previous execution get completed.

How can I execute file and wait till first execution completed and then execute another file in loop.

0
Comment
Question by:hirenshah
2 Comments
 
LVL 17

Accepted Solution

by:
inthe earned 50 total points
ID: 2666950
hi,
you can use something like this to execute each program:

function WinExecAndWait32(FileName:String; Visibility : integer):integer;
var
  zAppName:array[0..512] of char;
  zCurDir:array[0..255] of char;
  WorkDir:String;
  StartupInfo:TStartupInfo;
  ProcessInfo:TProcessInformation;
begin
  StrPCopy(zAppName,FileName);
  GetDir(0,WorkDir);
  StrPCopy(zCurDir,WorkDir);
  FillChar(StartupInfo,Sizeof(StartupInfo),#0);
  StartupInfo.cb := Sizeof(StartupInfo);
  StartupInfo.dwFlags := STARTF_USESHOWWINDOW;
  StartupInfo.wShowWindow := Visibility;
  if not CreateProcess(nil,
    zAppName,                      { pointer to command line string }
    nil,                           { pointer to process security attributes }
    nil,                           { pointer to thread security attributes }
    false,                         { handle inheritance flag }
    CREATE_NEW_CONSOLE or          { creation flags }
    NORMAL_PRIORITY_CLASS,
    nil,                           { pointer to new environment block }
    nil,                           { pointer to current directory name }
    StartupInfo,                   { pointer to STARTUPINFO }
    ProcessInfo) then Result := -1 { pointer to PROCESS_INF }
  else begin
    WaitforSingleObject(ProcessInfo.hProcess,INFINITE);
    GetExitCodeProcess(ProcessInfo.hProcess,Result);
  end;
end;


you can also look at the run_thread fuinctions often used at e.e to start a program and know when it is fnished:
example:

unit Unit1;

interface

uses
   Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls,
  ExtCtrls, ComCtrls;
type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

const unitName = 'runThread_.';

type TRunThread = class(TThread)
  private
    processHandle : cardinal;
    processReady  : boolean;
    waitingThread : cardinal;
    procedure Execute; override;
  end;

procedure TRunThread.Execute;
begin
  WaitForSingleObject(processHandle,INFINITE);
  processReady:=true;
  PostThreadMessage(waitingThread,WM_NULL,0,0);
end;

procedure TForm1.Button1Click(Sender: TObject);
var si  : TStartupInfo;
    pi  : TProcessInformation;
    dw1 : dword;
begin
  enabled:=false;
  caption:='start copy...';
  ZeroMemory(@si,sizeOf(si)); si.cb:=sizeOf(si);
  si.dwFlags:=STARTF_USESHOWWINDOW; si.wShowWindow:=SW_NORMAL;
  if CreateProcess(nil,'c:\windows\notepad.exe',nil,nil,false,0,nil,nil,si,pi) then begin
    caption:='copy started...';
    with TRunThread.Create(true) do
      try
        processHandle:=pi.hProcess;
        processReady:=false;
        waitingThread:=GetCurrentThreadID;
        caption:='wait for copy...';
        Resume;
        repeat
          Application.HandleMessage;
        until Application.Terminated or processReady;
        caption:='notepad closed...';
      finally Free end;
    GetExitCodeProcess(pi.hProcess,dw1);
    CloseHandle(pi.hThread);
    CloseHandle(pi.hProcess);
    caption:='ready... (exitCode='+IntToStr(dw1)+')';
  end else caption:='could not start notepad...';
  enabled:=true;
end;

end.


Regards Barry
0
 
LVL 20

Expert Comment

by:Madshi
ID: 2668041
Barry, would you please correct your answers database?   :-)

function WinExecAndWait32(FileName:String; Visibility : integer):integer;
begin
  [...]
    GetExitCodeProcess(ProcessInfo.hProcess,Result);
    CloseHandle(ProcessInfo.hProcess);  // add this one
    CloseHandle(ProcessInfo.hThread );  // and this one
  end;
end;

Regards, Madshi.
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.
In a recent question (https://www.experts-exchange.com/questions/28997919/Pagination-in-Adobe-Acrobat.html) here at Experts Exchange, a member asked how to add page numbers to a PDF file using Adobe Acrobat XI Pro. This short video Micro Tutorial sh…

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question