执行控制台程序并且获得它的输出结果

前几日遇到的问题在各位的帮助下已经圆满解决，现在吧这段代码写出来，可能会有一点用处。
procedure CheckResult(b: Boolean);
begin
if not b then
Raise Exception.Create(SysErrorMessage(GetLastError));
end;
function RunDOS(const Prog, CommandLine,Dir: String;var ExitCodeWORD): String;
var
HRead,HWrite:THandle;
StartInfo:TStartupInfo;
ProceInfo:TProcessInformation;
b:Boolean;
sa:TSecurityAttributes;
inS:THandleStream;
sRet:TStrings;
begin
Result := '';
FillChar(sa,sizeof(sa),0);
//设置允许继承，否则在NT和2000下无法取得输出结果
sa.nLength := sizeof(sa);
sa.bInheritHandle := True;
sa.lpSecurityDescriptor := nil;
b := CreatePipe(HRead,HWrite,@sa,0);
CheckResult(b);
FillChar(StartInfo,SizeOf(StartInfo),0);
StartInfo.cb := SizeOf(StartInfo);
StartInfo.wShowWindow := SW_HIDE;
//使用指定的句柄作为标准输入输出的文件句柄,使用指定的显示方式
StartInfo.dwFlags := STARTF_USESTDHANDLES+STARTF_USESHOWWINDOW;
StartInfo.hStdError := HWrite;
StartInfo.hStdInput := GetStdHandle(STD_INPUT_HANDLE);//HRead;
StartInfo.hStdOutput := HWrite;
b := CreateProcess(PChar(Prog),//lpApplicationName: PChar
PChar(CommandLine), //lpCommandLine: PChar
nil, //lpProcessAttributes: PSecurityAttributes
nil, //lpThreadAttributes: PSecurityAttributes
True, //bInheritHandles: BOOL
CREATE_NEW_CONSOLE,
nil,
PChar(Dir),
StartInfo,
ProceInfo );
CheckResult(b);
WaitForSingleObject(ProceInfo.hProcess,INFINITE);
GetExitCodeProcess(ProceInfo.hProcess,ExitCode);
inS := THandleStream.Create(HRead);
if inS.Size>0 then
begin
sRet := TStringList.Create;
sRet.LoadFromStream(inS);
Result := sRet.Text;
sRet.Free;
end;
inS.Free;
CloseHandle(HRead);
CloseHandle(HWrite);
end;
*******************
function GetDosOutput(const CommandLine:string): string;
var
SA: TSecurityAttributes;
SI: TStartupInfo;
PI: TProcessInformation;
StdOutPipeRead, StdOutPipeWrite: THandle;
WasOK: Boolean;
Buffer: array[0..255] of Char;
BytesRead: Cardinal;
WorkDir, Line: String;
begin
Application.ProcessMessages;
with SA do
begin
nLength := SizeOf(SA);
bInheritHandle := True;
lpSecurityDescriptor := nil;
end;
// create pipe for standard output redirection
CreatePipe(StdOutPipeRead, // read handle
StdOutPipeWrite, // write handle
@SA, // security attributes
0 // number of bytes reserved for pipe - 0 default
);
try
// Make child process use StdOutPipeWrite as standard out,
// and make sure it does not show on screen.
with SI do
begin
FillChar(SI, SizeOf(SI), 0);
cb := SizeOf(SI);
dwFlags := STARTF_USESHOWWINDOW or STARTF_USESTDHANDLES;
wShowWindow := SW_HIDE;
hStdInput := GetStdHandle(STD_INPUT_HANDLE); // don't redirect stdinput
hStdOutput := StdOutPipeWrite;
hStdError := StdOutPipeWrite;
end;
// launch the command line compiler
WorkDir := ExtractFilePath(CommandLine);
WasOK := CreateProcess(nil, PChar(CommandLine), nil, nil, True, 0, nil,
PChar(WorkDir), SI, PI);
　
// Now that the handle has been inherited, close write to be safe.
// We don't want to read or write to it accidentally.
CloseHandle(StdOutPipeWrite);
// if process could be created then handle its output
if not WasOK then
raise Exception.Create('Could not execute command line!')
else
try
// get all output until dos app finishes
Line := '';
repeat
// read block of characters (might contain carriage returns and line feeds)
WasOK := ReadFile(StdOutPipeRead, Buffer, 255, BytesRead, nil);
// has anything been read?
if BytesRead > 0 then
begin
// finish buffer to PChar
Buffer[BytesRead] := #0;
// combine the buffer with the rest of the last run
Line := Line + Buffer;
end;
until not WasOK or (BytesRead = 0);
// wait for console app to finish (should be already at this point)
WaitForSingleObject(PI.hProcess, INFINITE);
finally
// Close all remaining handles
CloseHandle(PI.hThread);
CloseHandle(PI.hProcess);
end;
finally
result:=Line;
CloseHandle(StdOutPipeRead);
end;
end;
**************
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
type
TForm1 = class(TForm)
Memo1: TMemo;
OpenDialog1: TOpenDialog;
btnRUn: TButton;
btnOpenFIle: TButton;
btnEditFile: TButton;
editfilename: TEdit;
procedure btnOpenfileClick(Sender: TObject);
procedure btnRunClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.btnOpenfileClick(Sender: TObject);
begin
if opendialog1.Execute then editfilename.Text := opendialog1.FileName;
end;
procedure TForm1.btnRunClick(Sender: TObject);
var
hReadPipe, hWritePipe: THandle;
si: STARTUPINFO;
lsa: SECURITY_ATTRIBUTES;
pi: PROCESS_INFORMATION;
mDosScreen: string;
cchReadBuffer: DWORD;
ph: PChar;
fname: PChar;
i, j: integer;
begin
fname := allocmem(255);
ph := AllocMem(5000);
lsa.nLength := sizeof(SECURITY_ATTRIBUTES);
lsa.lpSecurityDescriptor := nil;
lsa.bInheritHandle := True;
if CreatePipe(hReadPipe, hWritePipe, @lsa, 0) = false then
begin
ShowMessage('Can not create pipe!');
exit;
end;
fillchar(si, sizeof(STARTUPINFO), 0);
si.cb := sizeof(STARTUPINFO);
si.dwFlags := (STARTF_USESTDHANDLES or STARTF_USESHOWWINDOW);
si.wShowWindow := SW_SHOW;
si.hStdOutput := hWritePipe;
StrPCopy(fname, EditFilename.text);
if CreateProcess(nil, fname, nil, nil, true, 0, nil, nil, si, pi) = False then
begin
ShowMessage('can not create process');
FreeMem(ph);
FreeMem(fname);
Exit;
end;
while (true) do
begin
if not PeekNamedPipe(hReadPipe, ph, 1, @cchReadBuffer, nil, nil) then break;
if cchReadBuffer <> 0 then
begin
if ReadFile(hReadPipe, ph^, 4096, cchReadBuffer, nil) = false then break;
ph[cchReadbuffer] := chr(0);
Memo1.Lines.Add(ph);
end
else if (WaitForSingleObject(pi.hProcess, 0) = WAIT_OBJECT_0) then break;
Sleep(100);
end;
ph[cchReadBuffer] := chr(0);
Memo1.Lines.Add(ph);
CloseHandle(hReadPipe);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
CloseHandle(hWritePipe);
FreeMem(ph);
FreeMem(fname);
end;
end.