How to update date in a datepicker element. I have a int64_t attribute m_myDate that contains the date.
TimeSpan is a specialization of std::chrono::duration.DateTime a specialization of std::chrono::time_point.MainWindow.xaml.cpp
...
void MainWindow::saveBtn_Click(IInspectable const& sender, Microsoft::UI::Xaml::RoutedEventArgs const& args)
{
DateTime dateTime;
dateTime = myDatePicker().Date();
m_myDate = dateTime.time_since_epoch().count();
}
void MainWindow::loadBtn_Click(IInspectable const& sender, Microsoft::UI::Xaml::RoutedEventArgs const& args)
{
DateTime dateTime;
dateTime.time_since_epoch(std::chrono::nanoseconds(m_myDate)); // replace this with correct code
myDatePicker().Date(dateTime);
}
...
Environment c++20 winui3
All files as a VS 2022 project https://1drv.ms/u/s!AsM8s08DJk30u5kAsOK-A6MOZ8YiSg?e=whhfzN
void MainWindow::saveBtn_Click(IInspectable const& sender, Microsoft::UI::Xaml::RoutedEventArgs const& args)
{
DateTime dateTime;
dateTime = myDatePicker().Date();
m_myDate = dateTime.time_since_epoch().count();
myTextBox().Text(to_hstring(m_myDate));
}
void MainWindow::loadBtn_Click(IInspectable const& sender, Microsoft::UI::Xaml::RoutedEventArgs const& args)
{
myDatePicker().SelectedDate(winrt::Windows::Foundation::DateTime{ winrt::Windows::Foundation::TimeSpan{m_myDate} });
myDatePicker().UpdateLayout();
}
See https://github.com/TirsvadGUI/Cpp.Winui3.Example-Controls/tree/master/src/DatePicker