[UWP][C++] winrt How to copy file from assets folder to local folder.

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Kai-4867 asked · Dec 10, 2019 at 07:23 PM

[UWP][C++] winrt How to copy file from assets folder to local folder.

I want to copy a file from the Assets folder to the local folder. For this example lets use the LockScreenLogo.scale-200.png file as it commes with the default template. The docs give an example of file access here, https://docs.microsoft.com/en-us/windows/uwp/files/file-access-permissions. If I modify that example to access LockScreenLogo and on MainPage.cpp it would look like

 Windows::Foundation::IAsyncAction MainPage::ExampleCoroutineAsync()
     {
         Windows::Storage::StorageFile file{
             co_await Windows::Storage::StorageFile::GetFileFromApplicationUriAsync(Windows::Foundation::Uri{L"ms-appx:///Assets/LockScreenLogo.scale-200.png"})
         };
            
        
     }

This doesn't compile. And no examples are given to copy a file from Assets to the LocalFolder. Which I access else where with

auto location = winrt::Windows::Storage::ApplicationData::Current().LocalFolder();
winrt::Windows::Storage::StorageFolder Locationf{ location };

How can I copy a file from the assets folder to the LocalFolder?

windows-uwp

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Answer 1 · 2019-12-11T03:04:40.793Z

FayWang-MSFT answered · Dec 11, 2019 at 03:04 AM

Hello,

Welcome to our Microsoft Q&A platform!

When you get a file from the Assets folder, you can use CopyAsync() method to copy it to the local folder. For example:

 Windows::Foundation::IAsyncAction MainPage::ExampleCoroutineAsync( )
 {
         Windows::Storage::StorageFile file{
              co_await Windows::Storage::StorageFile::GetFileFromApplicationUriAsync(Windows::Foundation::Uri{L"ms-appx:///Assets/LockScreenLogo.scale-200.png"})
          };
         co_await file.CopyAsync(ApplicationData::Current().LocalFolder());
    
 }

Thanks.

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