我曾尝试使用delphi将命令发送到命令提示符。 但是，我无法这样做，因为我使用CreateProcess方法来做到这一点。 我试图更改StdOutPipeWrite，但是，在CreateProcess的初始命令传递之后，CreateProcess似乎不允许命令。 有没有办法利用句柄继续发送和接收来自命令提示符和delphi的命令和消息？
答案 0 :(得分：9)
我的同事Glenn9999来自tek-tips.com wrote a nice FAQ on this subject。 我不知道他是否在这样做，但他应该得到这一点。 我在这里复制了该页面的代码以供将来参考。他使用管道在控制台和delphi之间进行通信。
unit mcunit;
{ written by Glenn9999 @ tek-tips.com. Posted here 6/21/2011 }
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
type
monitor = class(TThread) // pipe monitoring thread for console output
private
TextString: String;
procedure UpdateCaption;
protected
procedure Execute; override;
end;
TForm1 = class(TForm)
CommandText: TMemo;
CommandRun: TComboBox;
Button2: TButton;
SaveDialog1: TSaveDialog;
procedure FormDestroy(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
cmdcount: integer;
end;
var
Form1: TForm1;
InputPipeRead, InputPipeWrite: THandle;
OutputPipeRead, OutputPipeWrite: THandle;
ErrorPipeRead, ErrorPipeWrite: THandle;
ProcessInfo : TProcessInformation;
myThread: monitor;
implementation
{$R *.DFM}
procedure WritePipeOut(OutputPipe: THandle; InString: string);
// writes Instring to the pipe handle described by OutputPipe
var
byteswritten: DWord;
begin
// most console programs require CR/LF after their input.
InString := InString + #13#10;
WriteFile(OutputPipe, Instring[1], Length(Instring), byteswritten, nil);
end;
function ReadPipeInput(InputPipe: THandle; var BytesRem: Integer): String;
{
reads console output from InputPipe. Returns the input in function
result. Returns bytes of remaining information to BytesRem
}
var
TextBuffer: array[1..32767] of char;
TextString: String;
BytesRead: Integer;
PipeSize: Integer;
begin
Result := '';
PipeSize := Sizeof(TextBuffer);
// check if there is something to read in pipe
PeekNamedPipe(InputPipe, nil, PipeSize, @BytesRead, @PipeSize, @BytesRem);
if bytesread > 0 then
begin
ReadFile(InputPipe, TextBuffer, pipesize, bytesread, nil);
// a requirement for Windows OS system components
OemToChar(@TextBuffer, @TextBuffer);
TextString := String(TextBuffer);
SetLength(TextString, BytesRead);
Result := TextString;
end;
end;
procedure monitor.Execute;
{ monitor thread execution for console output. This must be threaded.
checks the error and output pipes for information every 40 ms, pulls the
data in and updates the memo on the form with the output }
var
BytesRem: DWord;
begin
while not Terminated do
begin
// read regular output stream and put on screen.
TextString := ReadPipeInput(OutputPipeRead, BytesRem);
if TextString <> '' then
Synchronize(UpdateCaption);
// now read error stream and put that on screen.
TextString := ReadPipeInput(ErrorPipeRead, BytesRem);
if TextString <> '' then
Synchronize(UpdateCaption);
sleep(40);
end;
end;
procedure monitor.UpdateCaption;
// synchronize procedure for monitor thread - updates memo on form.
begin
With Form1.CommandText.Lines do
Add(TextString);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
WritePipeOut(InputPipeWrite, 'EXIT'); // quit the CMD we started
MyThread.Terminate;
// close process handles
CloseHandle(ProcessInfo.hProcess);
CloseHandle(ProcessInfo.hThread);
// close pipe handles
CloseHandle(InputPipeRead);
CloseHandle(InputPipeWrite);
CloseHandle(OutputPipeRead);
CloseHandle(OutputPipeWrite);
CloseHandle(ErrorPipeRead);
CloseHandle(ErrorPipeWrite);
end;
procedure TForm1.Button2Click(Sender: TObject);
{ takes the input from the command edit box and processes it }
var
UpText: String;
begin
UpText := UpperCase(CommandRun.Text); // done to eliminate case-sensitivity
if UpText = 'CLR' then // clear the memo
begin
CommandText.Clear;
WritePipeOut(InputPipeWrite, #13);
end
else
if UpText = 'SAVELOG' then // save the memo box to a file.
begin
if SaveDialog1.Execute then
begin
CommandText.Lines.SaveToFile(SaveDialog1.FileName);
CommandText.Lines.Add('Log file saved.');
end
else
CommandText.Lines.Add('Log file not saved.');
end
// expand this, it needs to catch any variation where the command-interpreter
// is called. Any different ideas?
else
if UpText = 'CMD' then
inc(cmdcount)
else
if UpText = 'COMMAND' then
inc(cmdcount)
// terminate app if user types exit, else let alone
else
if UpText = 'EXIT' then
begin
if cmdcount = 1 then
Application.Terminate
else
dec(cmdcount);
end
else
WritePipeOut(InputPipeWrite, CommandRun.Text);
CommandRun.Items.Add(CommandRun.Text);
CommandRun.Text := '';
CommandRun.SetFocus;
end;
procedure TForm1.FormCreate(Sender: TObject);
{ upon form creation, this calls the command-interpreter, sets up the three
pipes to catch input and output, and starts a thread to monitor and show
the output of the command-interpreter }
var
DosApp: String;
DosSize: Integer;
Security : TSecurityAttributes;
start : TStartUpInfo;
begin
CommandText.Clear;
// get COMSPEC variable, this is the path of the command-interpreter
SetLength(Dosapp, 255);
DosSize := GetEnvironmentVariable('COMSPEC', @DosApp[1], 255);
SetLength(Dosapp, DosSize);
// create pipes
With Security do
begin
nlength := SizeOf(TSecurityAttributes) ;
binherithandle := true;
lpsecuritydescriptor := nil;
end;
CreatePipe(InputPipeRead, InputPipeWrite, @Security, 0);
CreatePipe(OutputPipeRead, OutputPipeWrite, @Security, 0);
CreatePipe(ErrorPipeRead, ErrorPipeWrite, @Security, 0);
// start command-interpreter
FillChar(Start,Sizeof(Start),#0) ;
start.cb := SizeOf(start) ;
start.hStdInput := InputPipeRead;
start.hStdOutput := OutputPipeWrite;
start.hStdError := ErrorPipeWrite;
start.dwFlags := STARTF_USESTDHANDLES + STARTF_USESHOWWINDOW;
start.wShowWindow := SW_HIDE;
if CreateProcess(nil, PChar(DosApp), @Security, @Security, true,
CREATE_NEW_CONSOLE or SYNCHRONIZE,
nil, nil, start, ProcessInfo) then
begin
MyThread := monitor.Create(false); // start monitor thread
MyThread.Priority := tpHigher;
end;
Button2.Enabled := true;
cmdcount := 1;
end;
end.
答案 1 :(得分：-2)
首先声明使用：
namespace Foo {
T m;
U n;
}
然后使用：
ShellAPI