通过调用dos下的ECHO命令来管道输出到打印机来实现，在win9x下调用dos是command.com,而在win2000下是用CMD.EXE
可以试一下下面的语句function SysPrnStr(sPrnStr:string):Boolean;
begin
result:=false;
Case iVer of
1: //系统为Win98
begin
WinExec(PChar(sWinDir+'COMMAND.COM /C ECHO '+sPrnStr+'>PRN'),SW_HIDE);
Sleep(150);
end;
2: //系统为2000
begin
WinExec(PChar(sSysDir+'CMD.EXE /C ECHO '+sPrnStr+'>PRN'),SW_HIDE);
Sleep(150);
end;
end;
result:=true;
end;Sleep(150);//这句话可以不要，不过如果是在pos销售时连接扣条码机，不用这句可能会出现
打印顺序错乱的情况
可以试一下下面的语句function SysPrnStr(sPrnStr:string):Boolean;
begin
result:=false;
Case iVer of
1: //系统为Win98
begin
WinExec(PChar(sWinDir+'COMMAND.COM /C ECHO '+sPrnStr+'>PRN'),SW_HIDE);
Sleep(150);
end;
2: //系统为2000
begin
WinExec(PChar(sSysDir+'CMD.EXE /C ECHO '+sPrnStr+'>PRN'),SW_HIDE);
Sleep(150);
end;
end;
result:=true;
end;Sleep(150);//这句话可以不要，不过如果是在pos销售时连接扣条码机，不用这句可能会出现
打印顺序错乱的情况
var
Items: TStringList;
tt :string;
i : integer;
begin
printer.getprinter(adevice,adriver,aport,devicehandle);
devmode:=globallock(devicehandle);
with devmode^ do
begin dmfields:=dmfields;
dmpapersize :=DMPAPER_B4; dmfields:=dmfields;
dmorientation :=dmorient_portrait;{ dmfields:=dmfields;
dmorientation :=dmorient_landscape;
dmfields:=dmfields;
dmpapersize :=DMPAPER_B5;
dmfields:=dmPaperLength;
dmPaperLength :=1820;
dmfields:=dmPaperwidth;
dmPaperwidth :=2570;
}
end; marginleft :=8; fieldwd[0]:=2;
fieldwd[1]:=12;
fieldwd[2]:=6;
fieldwd[3]:=5;
fieldwd[4]:=6;
fieldwd[5]:=5;
fieldwd[6]:=5;
fieldwd[7]:=6;
fieldwd[8]:=5;
fieldwd[9]:=6;
fieldwd[10]:=6;
fieldwd[11]:=6;
fieldwd[12]:=6;
fieldwd[13]:=6; Items := TStringList.Create;
// Determine pixels per inch horizontally
PixelsInInchx := GetDeviceCaps(Printer.Handle, LOGPIXELSX);
TenthsOfInchPixelsY := GetDeviceCaps(Printer.Handle,LOGPIXELSY) div 10;
AmountPrinted := 0;
Printer.BeginDoc;
LineHeight := Printer.Canvas.TextHeight('X')+TenthsOfInchPixelsY;
PrintHeader;
PrintColumnNames;
printtotal;
recordprinted :=1;
query_1.First;
while (not query_1.Eof) do
begin
with Items do
begin
// AddObject(tblClients.FieldByName('ZIP').AsString,
// pointer(StrToInt(edtZip.Text)));
AddObject(query_1.Fields.Fields[0].AsString,pointer(fieldwd[0]));
AddObject(query_1.Fields.Fields[1].AsString,pointer(fieldwd[1]));
AddObject(query_1.Fields.Fields[2].AsString,pointer(fieldwd[2]));
for i := 3 to 13 do
begin
if query_1.Fields.Fields[i].asfloat <> 0 then
tt:=formatfloat('0.00',query_1.Fields.Fields[i].asfloat)
else
tt:=' ';
AddObject(tt,pointer(fieldwd[i]));
end;
{ AddObject(query_1.Fields.Fields[3].AsString,pointer(fieldwd[3]));
.
.
AddObject(query_1.Fields.Fields[13].AsString,pointer(fieldwd[13]));
} end;
PrintLine(Items);
recordprinted :=recordprinted +1;
if recordprinted >= 16 then
// if AmountPrinted + LineHeight > Printer.PageHeight then
begin
AmountPrinted := 0;
Printer.NewPage;
PrintHeader;
PrintColumnNames;
recordprinted :=1;
end;
Items.Clear;
query_1.Next;
end;
Printer.EndDoc;
Items.Free;
end;
提供一个98下的打印(Dos中断){*******************************************************}
{ }
{ Musicwind Delphi Development Package }
{ CommData Unit }
{ }
{ Copyright ( c ) 2000,2005 Musicwind }
{ }
{ History: }
{ }
{ Build with Delphi5, Musicwind [2000-03-??] }
{ }
{ TDosPrinter - a class use with Comm32.dll }
{ }
{*******************************************************}unit DosPrinter;// Note: Only Be Ok in Win98, and the printer must be in
// lpt1, lpt2 or lpt3;
// And Be Sure your Windows does not install the printer
//
// User Guide: Just add this unit into the "uses" clause, then you may
// call LPT1.Write, LPT1.WriteLn, LTP1.WriteFmt directly to
// make output on the printer. (LPT2 is also supported).
//
// Limitation: This unit does not have error checking capabilities.// New added Guide:
// TDosPrinter;
// Can Check whether the printer is empty of paper, or
// printer does not linked, or other errors.
//interfaceuses Classes, SysUtils, Windows, MusicSys;type
// 并口号
TDosLptPort = ( dpLpt1, dpLpt2, dpLpt3 ); // 错误类别, ( 未联机, 缺纸, 超时 )
TErrType = ( etLinkLost, etLackPaper, etTimeout ); // 打印错误事件
TErrMsgEvent = procedure(Sender: TObject; ErrType: TErrType;
var Retry: Boolean ) of object; TDosPrinter = class
private
FLptPort: TDosLptPort;
FOnErr: TErrMsgEvent;
FblActive: Boolean;
protected public
Constructor Create; procedure BeginDoc;
procedure EndDoc;
procedure DoDoubleWidth( bl: Boolean );
procedure DoDoubleHeight( bl: Boolean );
procedure DoBold( bl: Boolean );
procedure ChineseMode;
procedure DoExpress( bl: Boolean );
procedure CR;
procedure Writeln( sLine: string );
procedure Write( sLine: string );
function WriteChar( Achar: char ): Boolean;
procedure MovePaper( iSize: integer ); property Active: Boolean read FblActive;
property LptPort: TDosLptPort read FLptPort write FLptPort;
property OnErr: TErrMsgEvent read FOnErr write FOnErr; end;function DosLpt1: TDosPrinter;
function DosLpt2: TDosPrinter;
implementationvar
_DosLpt1: TDosPrinter = nil;
_DosLpt2: TDosPrinter = nil;function DosLpt1: TDosPrinter;
begin
if not Assigned( _DosLpt1 ) then
begin
_DosLpt1 := TDosPrinter.Create;
_DosLpt1.LptPort := dpLpt1;
end;
result := _DosLpt1;
end;function DosLpt2: TDosPrinter;
begin
if not Assigned( _DosLpt2 ) then
begin
_DosLpt2 := TDosPrinter.Create;
_DosLpt2.LptPort := dpLpt2;
end;
result := _DosLpt2;
end;{ TDosPrinter }procedure TDosPrinter.BeginDoc;
begin
// Do nothing ...
end;procedure TDosPrinter.ChineseMode;
begin
Write( #28 + '&' );
end;procedure TDosPrinter.CR;
begin
Write( #13 );
end;constructor TDosPrinter.Create;
begin
FLptPort := dpLpt1;
FblActive := True;
end;procedure TDosPrinter.DoBold(bl: Boolean);
begin
if bl then
Write( #27 + 'E' )
else
Write( #27 + 'F' );
end;procedure TDosPrinter.DoDoubleHeight(bl: Boolean);
begin
if bl then
Write( #27 + 'w' + #1 )
else
Write( #27 + 'w' + #0 );
end;procedure TDosPrinter.DoDoubleWidth(bl: Boolean);
begin
if bl then
Write( #27 + 'W' + #1 )
else
Write( #27 + 'W' + #0 );
end;procedure TDosPrinter.DoExpress(bl: Boolean);
begin
if bl then
Write( #28 + 'x' + #1 )
else
Write( #28 + 'x' + #0 );
end;procedure TDosPrinter.EndDoc;
begin
// Do nothing ...
end;procedure TDosPrinter.MovePaper(iSize: integer);
begin
Write( #27 + 'J' + char( iSize mod 255 ) );
end;procedure TDosPrinter.Write(sLine: string);
var
index: longint;
begin
for Index := 1 to length( sLine ) do
if not WriteChar( sLine[Index] ) then
Break;
end;function TDosPrinter.WriteChar( AChar: char): Boolean;
var
byteChar, byteStatus: Byte;
wordLpt: Word;
bPaperOut, bSelected, bIOError, bTimeOut, bOK: Boolean;
// below is new added by Musicwind, 2001-02-08
FErrType: TErrType;
Retry: Boolean;
dwTimeOut: DWORD;
begin
result := False; if not mscIsWin98 then
begin
FblActive := result;
Exit;
end; byteChar := byte( AChar );
if FLptPort = dpLpt1 then
wordLpt := 0 else
if FLptPort = dpLpt2 then
wordLpt := 1 else
if FLptPort = dpLpt3 then
wordLpt := 2
else
wordLpt := 0;
repeat
retry := False; byteStatus := $40;
while (( byteStatus and $80 ) = 0 ) and (( byteStatus and $40 ) <> 0 ) do
asm
MOV AH, 0
MOV DX, wordLpt
MOV AL, byteChar
INT 17H
MOV byteStatus, AH
end;
bTimeOut := ( byteStatus and $01 ) <> 0;
bIOError := ( byteStatus and $08 ) <> 0;
bSelected := ( byteStatus and $10 ) <> 0;
bPaperOut := ( byteStatus and $20 ) <> 0; if bTimeOut then
FErrType := etTimeOut
else
if bSelected and bPaperOut and bIOError then
FErrType := etLackPaper
else
if bSelected and bPaperOut or bIOError then
FErrType := etLinkLost
else
begin
// Print content
result := True; end; if not result then
begin
Retry := False;
if Assigned( FOnErr ) then
begin
Retry := True;
FOnErr( Self, FErrType, Retry );
end;
end;
until result or not Retry;
FblActive := result;
if not FblActive then
raise Exception.Create( '打印出错!' );
end;procedure TDosPrinter.Writeln(sLine: string);
begin
Write( sLine + #13#10 );
end;initializationfinalizationend.
{ }
{ Musicwind Delphi Development Package }
{ Lpt Unit }
{ }
{ Copyright ( c ) 2000,2005 Musicwind }
{ }
{ History: }
{ }
{ Build with Delphi5, Musicwind [2000-12-18] }
{ }
{ TLpt
{ TLptStream
{ TEpson300K
{ }
{*******************************************************}
unit LPT;// Note: Only Be Ok in WinNt or later OS
// And Be Sure your Windows does not install the printer
//
// User Guide: Just add this unit into the "uses" clause, then you may
// call LPT1.Write, LPT1.WriteLn, LTP1.WriteFmt directly to
// make output on the printer. (LPT2 is also supported).
//
// Limitation: This unit does not have error checking capabilities.// New added Guide:
// TEpson300K;
// added for Epson 300K , by Musicwind, at 2000-12-18
// interfaceuses Classes, SysUtils, Windows, SyncObjs;type TLPT = class
protected
FDeviceName: string;
FHandle: THandle;
FEvent: TSimpleEvent;
FOverlap: TOverlapped;
procedure SetActive(Value: Boolean);
procedure SetDeviceName(AName: string);
function GetActive: Boolean;
public
constructor Create; virtual;
destructor Destroy; override;
procedure Open;
procedure Close;
procedure WriteBuf(const Buf: PChar; Len: Integer);
procedure Write(const AString: string);
procedure WriteLn(const AString: string);
procedure WriteFmt(const FmtStr: string; Args: array of const);
property Active: Boolean read GetActive write SetActive;
property Handle: THandle read FHandle;
published
property DeviceName: string read FDeviceName write SetDeviceName;
end; TLPTStream = class(TStream)
public
function Read(var Buffer; Count: Longint): Longint; override;
function Write(const Buffer; Count: Longint): Longint; override;
function Seek(Offset: Longint; Origin: Word): Longint; override;
procedure WriteLn(const S: string);
end; TEpson300K = class ( TLpt )
private
FiPageHeight: integer; // 一页的高度( 单位：英寸 )
FblChinese: Boolean; // 汉字打印模式
FblExpress: Boolean; // 高速打印模式
procedure SetFiPageHeight(const Value: integer); // 页长度, 单位( 英寸 ) public
constructor Create; override; procedure BeginDoc; // 开始一个文档
procedure EndDoc; // 结束....
procedure BeginPage; // 开始页
procedure EndPage; // 结束页
procedure BeginBold; // 开始粗体
procedure EndBold; // 结束粗体 procedure MovePaper( iHeight: integer );
procedure DoubleHeight(bl: Boolean);
procedure DoubleWidth(bl: Boolean);
property PageHeight: integer read FiPageHeight write SetFiPageHeight;
property ChineseMode: Boolean read FblChinese write FblChinese;
property ExpressMode: Boolean read FblExpress write FblExpress;
end;function LPT1: TLPT;
function LPT2: TLPT;function Epson300k1: TEpson300k;
function Epson300k2: TEpson300k;
implementation // ===========================================================var _LPT1: TLPT = nil;
_LPT2: TLPT = nil;
_Epson300k1: TEpson300k = nil;
_Epson300k2: TEpson300k = nil;
{ TLPT }constructor TLPT.Create;
begin
FDeviceName := 'LPT1';
FEvent := TSimpleEvent.Create;
FOverlap.hEvent := FEvent.Handle;
end;destructor TLPT.Destroy;
begin
Active := False;
inherited;
end; procedure TLPT.SetActive(Value: Boolean);
begin
if Value = Active then exit;
if Value then begin
FHandle := CreateFile(PChar(FDeviceName), GENERIC_WRITE,
FILE_SHARE_READ or FILE_SHARE_WRITE, nil,
OPEN_EXISTING, FILE_FLAG_NO_BUFFERING or FILE_FLAG_OVERLAPPED, 0);
end
else begin
CloseHandle(FHandle);
FHandle := INVALID_HANDLE_VALUE;
end;
end;procedure TLPT.SetDeviceName(AName: string);
begin
Active := False;
FDeviceName := AName;
end;function TLPT.GetActive: Boolean;
begin
Result := FHandle <> INVALID_HANDLE_VALUE;
end;procedure TLPT.Open;
begin
Active := True;
end;procedure TLPT.Close;
begin
Active := False;
end;procedure TLPT.WriteBuf(const Buf: PChar; Len: Integer);
var
Num: Integer;
begin
if Active = False then
Active := True;
if Active and (Len > 0) then
WriteFile(FHandle, Buf^, Cardinal( Len ), Cardinal( Num ), @FOverlap);
end;procedure TLPT.Write(const AString: string);
begin
WriteBuf(PChar(AString), Length(AString));
end;procedure TLPT.WriteLn(const AString: string);
const
CRLF: array[0..1] of Char = (#13, #10);
begin WriteBuf(PChar(AString), Length(AString));
WriteBuf(CRLF, 2);
end;procedure TLPT.WriteFmt(const FmtStr: string; Args: array of const);
begin
Write(Format(FmtStr, Args));
end;function TLPTStream.Read(var Buffer; Count: Longint): Longint;
begin
Result := 0;
end;function TLPTStream.Write(const Buffer; Count: Longint): Longint;
begin
Result := Count;
if Count > 0 then
LPT1.WriteBuf(PChar(@Buffer), Count);
end;function TLPTStream.Seek(Offset: Longint; Origin: Word): Longint;
begin
Result := 0;
end;procedure TLPTStream.WriteLn(const S: string);
begin
LPT1.WriteLn(S);
end;
// ==========================================================================function LPT1: TLPT;
begin
if _LPT1 = nil then begin
_LPT1 := TLPT.Create;
_LPT1.DeviceName := 'LPT1';
_LPT1.Active := True;
end;
Result := _LPT1;
end;function Epson300k1: TEpson300k;
begin
if _Epson300k1 = nil then
begin
_Epson300k1 := TEpson300k.Create;
_Epson300k1.DeviceName := 'LPT1';
_Epson300k1.Active := True;
end;
result := _Epson300k1;
end;function Epson300k2: TEpson300k;
begin
if _Epson300k2 = nil then
begin
_Epson300k2 := TEpson300k.Create;
_Epson300k2.DeviceName := 'LPT2';
_Epson300k2.Active := True;
end;
result := _Epson300k2;
end;
function LPT2: TLPT;
begin
if _LPT2 = nil then begin
_LPT2 := TLPT.Create;
_LPT2.DeviceName := 'LPT2';
_LPT2.Active := True;
end;
Result := _LPT2;
end;// =========================================================================={ TEpson300K }procedure TEpson300K.BeginBold;
begin
Write( #27 + 'E' );
end;procedure TEpson300K.DoubleWidth( bl: Boolean );
begin
if bl then
Write( #27 + 'W' + #1 )
else
Write( #27 + 'W' + #0 );
end;procedure TEpson300K.DoubleHeight( bl: Boolean );
begin
if bl then
Write( #27 + 'w' + #1 )
else
Write( #27 + 'w' + #0 );end;procedure TEpson300K.BeginDoc;
begin
Active := True;
if FblChinese then
Write( #28 + '&' ) ; // 设定汉字打印模式
if FblExpress then
Write( #28 + 'x' + #1 )
else
Write( #28 + 'x' + #0 );
end;procedure TEpson300K.BeginPage;
begin
if ( FiPageHeight >= 1 ) and ( FiPageHeight <= 22 ) then
begin
Write( #27 + 'C' + #0 + Char( FiPageHeight ) ) ;
Write( #27 + '$' + #0 + #0 ); // 设定绝对位置为 y=0, x=0
end;
end;constructor TEpson300K.Create;
begin
inherited;
FiPageHeight := 0;
FblChinese := True;
FblExpress := False;
end;procedure TEpson300K.EndBold;
begin
Write( #27 + 'F' );
end;procedure TEpson300K.EndDoc;
begin
Active := False;
end;procedure TEpson300K.EndPage;
begin
if FiPageHeight <> 0 then
Write( #12 );
end;procedure TEpson300K.MovePaper(iHeight: integer);
begin
Writeln( #27 + 'J' + char( iHeight mod 255 ) );
end;procedure TEpson300K.SetFiPageHeight(const Value: integer);
begin
FiPageHeight := Value mod 22;
end;initialization
finalization
if _LPT1 <> nil then _LPT1.Free;
if _LPT2 <> nil then _LPT2.Free; if _Epson300k1 <> nil then _Epson300k1.Free;
if _Epson300k2 <> nil then _Epson300k2.Free;end.