如何将System::Datetime转换为QDateTime?
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1831 次
4 回答
0
也许这是一种直截了当的方法,但也很容易理解:
a) 将 System::Datetime 转换为字符串DateTime.ToString()
b)将字符串转换为 QDateTimeQDateTime::fromString()
或考虑使用QDateTime::fromTime_t()
(参见Datetime to time_t conversion的示例)
于 2016-04-01T09:34:35.117 回答
0
使用 Win32 API
#define WINDOWS_TICKS_PER_SEC 10000000
#define EPOCH_DIFFERENCE 11644473600LL
QDatetime getQDatetime(){
FILETIME ft = {0};
::GetSystemTimeAsFileTime(&ft); //Retrieves the current system date and time.
LARGE_INTEGER li = {0};
li.LowPart = ft.dwLowDateTime;
li.HighPart = ft.dwHighDateTime;
long long int hns = li.QuadPart;
wprintf(L"Windows API time: %lli\n", hns);
long long int utm ;
utm=(hns / WINDOWS_TICKS_PER_SEC - EPOCH_DIFFERENCE);
wprintf(L"Unix time: %lli\n", utm);
return QDateTime::fromTime_t(utm);
}
于 2016-04-01T10:28:35.787 回答
0
您可以使用ISO 8601规范作为中间格式:
/* not tested */
System::DateTime date;
QString str(date.ToString("O")); // "O" for ISO format
QDateTime qdt = QDateTime::fromString(str, Qt::ISODate);
于 2016-04-01T11:20:59.950 回答
0
QDateTime::fromString(QString::fromStdWString(msclr::interop::marshal_as<std::wstring>(systemDateTime.ToString("ddMMyyyy HH:mm:ss"))), "ddMMyyyy HH:mm:ss"))
于 2016-04-05T06:53:11.193 回答