通过使用 Windows 打印池 API,我们可以打印 XPS 文件。
问题在于打印池忽略了默认打印机设置。
(我们已放弃尝试 应用打印机设置。 默认打印机设置将足以满足需要。)
例如...打印总是彩色并且一页纸上只有一个,无论控制面板中的设置如何:黑白/彩色、双面/非双面、多页/单页。
其他应用程序如 MS Word 和 Adobe 尊重默认打印机设置。
我们正在使用 Delphi XE2 和 Windows 7 64 位。
此测试代码是自包含的,因此您只需粘贴即可进行测试...
使用以下内容向组合框填充打印机名称:
uses
Printers
ComboBox1.Items.Assign(Printer.Printers);
打印程序:
uses
Winapi.WinSpool
procedure PrintXPS(PrinterName, FileNameXPS: string; ParentFormHandle: THandle = 0);
// Printer handle
procedure Printer_Open(out Printer: THandle; Defaults: PPrinterDefaultsW = nil);
begin
if not OpenPrinterW(PWideChar(PrinterName), Printer, Defaults) then
RaiseLastOSError;
end;
procedure Printer_Close(Printer: THandle);
begin
if not ClosePrinter(Printer) then
RaiseLastOSError;
end;
// Print jobs
function JobCreate(Printer: THandle; FileName: string): Cardinal;
var
lBufferSize: Cardinal;
lAddJobInfo: PAddJobInfo1W;
begin
// Create job
AddJobW(Printer, 1, nil, 0, lBufferSize);
GetMem(lAddJobInfo, lBufferSize);
try
if not AddJobW(Printer, 1, lAddJobInfo, lBufferSize, lBufferSize) then
RaiseLastOSError;
Result := lAddJobInfo.JobId;
// Copy the file into place
CopyFile(PWideChar(FileName), lAddJobInfo.Path, True);
finally
FreeMem(lAddJobInfo, lBufferSize);
end;
end;
procedure JobStart(Printer: THandle; JobID: Cardinal);
begin
if not ScheduleJob(Printer, JobID) then
RaiseLastOSError;
end;
var
PrinterA: THandle;
JobID: Cardinal;
begin
if not FileExists(FileNameXPS) then
raise Exception.Create('File not found: ' + FileNameXPS);
Printer_Open(PrinterA, nil);
try
JobID := JobCreate(PrinterA, FileNameXPS);
JobStart(PrinterA, JobID);
finally
Printer_Close(PrinterA);
end;
end;