QT C 上的 QProcess 备份数据库++
我想在QT程序中使用qprocess备份我的数据库，代码如下，但是备份时出现0kb，当我查看错误Qprocess: Destroyed while process("mysqldump.exe") is still running时。
QProcess dump(this);
QStringlist args;
QString path="C:/Users/mahmut/Desktop/dbbackupfile/deneme.sql";
args<<"-uroot"<<"-proot"<<"kopuz"<<">";
dump.setStandardOutputFile(path);
dump.start("mysqldump.exe",args);
if(!dump.waitForStarted(1000))
{
qDebug()<<dump.errorString();
}
你能帮助我吗？我不明白这个错误并确定备份文件。
I want to backup my database with qprocess in QT program, the code is as follows, but 0kb occurs when backing up and when I look at the error Qprocess: Destroyed while process("mysqldump.exe") is still runnuing.
QProcess dump(this);
QStringlist args;
QString path="C:/Users/mahmut/Desktop/dbbackupfile/deneme.sql";
args<<"-uroot"<<"-proot"<<"kopuz"<<">";
dump.setStandardOutputFile(path);
dump.start("mysqldump.exe",args);
if(!dump.waitForStarted(1000))
{
qDebug()<<dump.errorString();
}
Can you help to me? ı do not understand this error and okb back up file.
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您的程序在进程完成之前终止，您需要使用
static bool QProcess::startDetached(program,arguments,workingDirectory)或添加dump.waitForFinished();到末尾。另外，您不需要添加“>”到争论。您已使用
dump.setStandardOutputFile(path), ">" 重定向输出不适用于进程，因为它需要 shell 来执行命令，QProcess不使用 shell，它只运行一个进程而不是 shell 表达式。Your program terminates before process finished, you need to either use
static bool QProcess::startDetached(program, arguments, workingDirectory)or adddump.waitForFinished();to the end.Also, you dont need to add ">" to arguments. You already redirected output with
dump.setStandardOutputFile(path), ">" does not work with process as it requires shell to execute command,QProcessdoes not use shell it just runs one process not shell expression.