Question

我正在使用Qt4.8，我想要的是打开pdf并通过cmd.exe自动打印pdf，而不使用QProcess点击pdf阅读器中的打印按钮：

我有两个不同的代码执行两个不同的任务： Opne Pdf

QString scmd= "cmd.exe";
list.push_back("/C");
list.push_back("test.pdf");
Process.start(scmd, list);
Sleep(2000);

打印pdf而不打开它

QString scmd2 = "C:/Program Files (x86)/Adobe/Reader 11.0/Reader/AcroRd32.exe.exe"
list2.push_back("/t");
list2.push_back("test.pdf");
Process.start(scmd2, list2);
Sleep(2000);

所以我想合并这个命令，我不知道我怎么能这样做？请给我一些建议

Answer 1

您可以从Windows注册表的HKEY_CLASSES_ROOT获取所有信息。

以下是如何获取打印软件的默认路径以及如何运行它的示例。我在Qt 5.7上测试了它

#include <QSettings>
#include <QProcess>
#include <QDebug>

int main(int argc, char *argv[])
{
    const QString classesRoot = "HKEY_CLASSES_ROOT";

    // get ID of .pdf extension
    QSettings pdfSettings(classesRoot + "\\.pdf", QSettings::NativeFormat);
    QString pdfId = pdfSettings.value("Default").toString();

    // get path to default program that associated with PDF files
    QString printPath = QSettings(classesRoot + "\\" + pdfId + "\\shell\\print\\command", QSettings::NativeFormat).value("Default").toString();
    QString openPath = QSettings(classesRoot + "\\" + pdfId + "\\shell\\open\\command", QSettings::NativeFormat).value("Default").toString();
    qDebug() << "print path" << printPath;
    qDebug() << "open path" << openPath;

    // open .pdf file
    QProcess::startDetached(openPath.arg("full path to pdf file.pdf") );

    // print .pdf file
    QProcess printProcess;
    printProcess.start(printPath.arg("full path to pdf file.pdf") );
    printProcess.waitForFinished(-1);

    return 0;
}

cmd.exe打开pdf并打印出来

1 个答案: