Windows 7 and Windows 10, QSettings read registory REG_DWORD keys, can not get the values
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Windows 7 and Windows 10, QSettings read registory REG_DWORD keys, can not get the values,but other type keys can read well, eg. REG_SZ.
code as below:
void MainWindow::on_pushButton_clicked()
{
ui->listWidget->clear();
QString str = ui->lineEdit->text();
QSettings reg(str, QSettings::Registry64Format);
QStringList keyList=reg.childKeys();
foreach(QString key, keyList)
{
QString keyvalue=reg.value(key).toString();
ui->listWidget->addItem(key + " = " + keyvalue);
}
}
output as below:
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Windows 7 and Windows 10, QSettings read registory REG_DWORD keys, can not get the values,but other type keys can read well, eg. REG_SZ.
code as below:
void MainWindow::on_pushButton_clicked()
{
ui->listWidget->clear();
QString str = ui->lineEdit->text();
QSettings reg(str, QSettings::Registry64Format);
QStringList keyList=reg.childKeys();
foreach(QString key, keyList)
{
QString keyvalue=reg.value(key).toString();
ui->listWidget->addItem(key + " = " + keyvalue);
}
}
output as below:
@Frankkon said in Windows 7 and Windows 10, QSettings read registory REG_DWORD keys, can not get the values:
reg.value(key).toString()
Did you try to print out reg.value(key)
qDebug() << reg.value(key);You're converting it to string, but actually it is an integer number. You should convert to string like this:
QString::number(reg.value(key).toInt()); -
@Frankkon said in Windows 7 and Windows 10, QSettings read registory REG_DWORD keys, can not get the values:
reg.value(key).toString()
Did you try to print out reg.value(key)
qDebug() << reg.value(key);You're converting it to string, but actually it is an integer number. You should convert to string like this:
QString::number(reg.value(key).toInt());@jsulm Thank you very much. I do as you said, but it still not work well.
my debug code as below:
qDebug() << key << " = " << reg.value(key);
qDebug() << key << " = " << reg.value(key).toInt();
qDebug() << key << " = " << QString::number(reg.value(key).toInt());
the debug output as below:
but regedit tool shows as below:
can you help me? thank you.
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Hi, unfortunately when registry keys contain slashes or backslashes QSettings does not work :-(
But you can still use old the old Win32 API, like this:Add
LIBS += -ladvapi32
to your .pro file.Add
#include "windows.h"to your .cpp file.And try something like this:
QSettings reg("HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows\\CurrentVersion\\SharedDLLs\\",QSettings::NativeFormat); for (QString key : reg.childKeys()) { key = key.replace("/","\\"); // replace back to backslashes to keep Windows happy DWORD dw = 0,sdw = sizeof(dw); // dword value comes to dw ::RegGetValue(HKEY_LOCAL_MACHINE,L"Software\\Microsoft\\Windows\\CurrentVersion\\SharedDLLs",(LPCWSTR) key.constData(),RRF_RT_DWORD,NULL,&dw,&sdw); qDebug() << key << dw; } -
Hi, unfortunately when registry keys contain slashes or backslashes QSettings does not work :-(
But you can still use old the old Win32 API, like this:Add
LIBS += -ladvapi32
to your .pro file.Add
#include "windows.h"to your .cpp file.And try something like this:
QSettings reg("HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows\\CurrentVersion\\SharedDLLs\\",QSettings::NativeFormat); for (QString key : reg.childKeys()) { key = key.replace("/","\\"); // replace back to backslashes to keep Windows happy DWORD dw = 0,sdw = sizeof(dw); // dword value comes to dw ::RegGetValue(HKEY_LOCAL_MACHINE,L"Software\\Microsoft\\Windows\\CurrentVersion\\SharedDLLs",(LPCWSTR) key.constData(),RRF_RT_DWORD,NULL,&dw,&sdw); qDebug() << key << dw; }@hskoglund Thank you! Yes, the problom is “\” , I create a key like "aaa/bbb/ccc"， QSettings can work well on it. Thanks a lot.
