Access to application files for Windows 8 Metro

, WinRT (Microsoft Surface RT) Windows 8.1 RT. :

• UNC
• ,

: http://msdn.microsoft.com/en-US/library/windows/apps/hh967755.aspx

As a bonus, this shows how to capture output to standard output in a WinRT application.

The code:

#include "App.xaml.h"
#include "MainPage.xaml.h"
#include <ppltasks.h>

using namespace TestApp;

using namespace Platform;
using namespace Windows::UI::Xaml::Navigation;
using namespace Concurrency;

// Anything that is written to standard output in this function will be saved to a file on a network share
int MAIN(int argc, char** argv)
{
    printf("This is log output that is saved to a file on a network share!\n");
    return 0;
}

static char buffer[1024*1024];

Windows::Foundation::IAsyncOperation<int>^ MainPage::RunAsync()
{
    return create_async([this]()->int {
        return MAIN(1, NULL);
    });
}

using namespace concurrency;
using namespace Platform;
using namespace Windows::Storage;
using namespace Windows::System;

void MainPage::Run()
{
    //capture stdout in buffer
    setvbuf(stdout, buffer, _IOFBF, sizeof(buffer));

    task<int> testTask(RunAsync());

    testTask.then([this](int test_result)
    {
        size_t origsize = strlen(buffer) + 1;
        wchar_t* wcstring = new wchar_t[sizeof(buffer)* sizeof(wchar_t)];

        size_t  converted_chars = 0;
        mbstowcs_s(&converted_chars, wcstring, origsize, buffer, _TRUNCATE);
        String^ contents = ref new Platform::String(wcstring);
        delete [] wcstring;

        Platform::String^ Filename = "log_file.txt";
        Platform::String^ FolderName = "\\\\MY-SHARE\\shared-folder";

        create_task(Windows::Storage::StorageFolder::GetFolderFromPathAsync(FolderName)).then([this, Filename, contents](StorageFolder^ folder)
        {
            create_task(folder->CreateFileAsync(Filename, CreationCollisionOption::ReplaceExisting)).then([this, contents](StorageFile^ file)
            {
                create_task(FileIO::WriteTextAsync(file, contents)).then([this, file, contents](task<void> task)
                {
                    try
                    {
                        task.get();
                        OutputBox->Text = ref new Platform::String(L"File written successfully!");
                    }
                    catch (COMException^ ex)
                    {
                        OutputBox->Text = ref new Platform::String(L"Error writing file!");
                    }
                });
            });
        });
    });
}

MainPage::MainPage()
{
    InitializeComponent();
    Run();
}

manifesto:

<?xml version="1.0" encoding="utf-8"?>
<Package xmlns="http://schemas.microsoft.com/appx/2010/manifest" xmlns:m2="http://schemas.microsoft.com/appx/2013/manifest">
  <Identity Name="6f9dc943-75a5-4195-8a7f-9268fda4e548" Publisher="CN=Someone" Version="1.1.0.1" />
  <Properties>
    <DisplayName>TestApp</DisplayName>
    <PublisherDisplayName>Someone</PublisherDisplayName>
    <Logo>Assets\StoreLogo.png</Logo>
    <Description>TestApp</Description>
  </Properties>
  <Prerequisites>
    <OSMinVersion>6.3</OSMinVersion>
    <OSMaxVersionTested>6.3</OSMaxVersionTested>
  </Prerequisites>
  <Resources>
    <Resource Language="x-generate" />
  </Resources>
  <Applications>
    <Application Id="App" Executable="$targetnametoken$.exe" EntryPoint="TestApp.App">
      <m2:VisualElements DisplayName="TestApp" Description="TestApp" BackgroundColor="#222222" ForegroundText="light" Square150x150Logo="Assets\Logo.png" Square30x30Logo="Assets\SmallLogo.png">
        <m2:DefaultTile>
          <m2:ShowNameOnTiles>
            <m2:ShowOn Tile="square150x150Logo" />
          </m2:ShowNameOnTiles>
        </m2:DefaultTile>
        <m2:SplashScreen Image="Assets\SplashScreen.png" />
      </m2:VisualElements>
      <Extensions>
        <Extension Category="windows.fileTypeAssociation">
          <FileTypeAssociation Name="text">
            <DisplayName>Text file</DisplayName>
            <SupportedFileTypes>
              <FileType ContentType="text/plain">.txt</FileType>
            </SupportedFileTypes>
          </FileTypeAssociation>
        </Extension>
      </Extensions>
    </Application>
  </Applications>
  <Capabilities>
    <Capability Name="musicLibrary" />
    <Capability Name="picturesLibrary" />
    <Capability Name="videosLibrary" />
    <Capability Name="internetClient" />
    <Capability Name="internetClientServer" />
    <Capability Name="enterpriseAuthentication" />
    <Capability Name="privateNetworkClientServer" />
  </Capabilities>
</Package>