public async void Create()
{
// Create sample file; replace if exists.
Windows.Storage.StorageFolder storageFolder =
Windows.Storage.ApplicationData.Current.LocalFolder;
Windows.Storage.StorageFile sampleFile = await storageFolder.CreateFileAsync("Untitled.txt",
Windows.Storage.CreationCollisionOption.ReplaceExisting);
File = await _FileService.LoadAsync(sampleFile);
await sampleFile.DeleteAsync(Windows.Storage.StorageDeleteOption.PermanentDelete);
}
//override the on navigated to at the page level as well to handle the jump list.
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
//the parameter being passed from the on launched event handler in app
//is the file itself.
// verify that the file is of type storage file then pass it to the view model via
// the service as normal.
// this loads the contents of the file into the view from the jump list.
if (e.Parameter is StorageFile)
{
var service = new Services.FileService();
var model = await service.LoadAsync(e.Parameter as StorageFile);
ViewModel.File = model;
}
}
public async void Open()
{
// prompt a picker
var picker = new FileOpenPicker
{
ViewMode = PickerViewMode.List,
SuggestedStartLocation = PickerLocationId.DocumentsLibrary,
};
picker.FileTypeFilter.Add(".txt");
var file = await picker.PickSingleFileAsync();
if (file == null)
{
await new Windows.UI.Popups.MessageDialog("No file selected.").ShowAsync();
}
else
{
File = await _FileService.LoadAsync(file);
}
}
public async void Open()
{
var picker = new FileOpenPicker
{
ViewMode = PickerViewMode.List,
SuggestedStartLocation = PickerLocationId.DocumentsLibrary,
};
picker.FileTypeFilter.Add(".txt");
var file = await picker.PickSingleFileAsync();
if (file == null)
{
await new Windows.UI.Popups.MessageDialog("No file selected !").ShowAsync();
}
else
{
File = await _fileService.LoadAsync(file);
}
List <string> fileProperties = new List <string>();
fileProperties.Add("File name: " + file.Name);
fileProperties.Add("File type: " + file.FileType);
// Get file's basic properties.
Windows.Storage.FileProperties.BasicProperties basicProperties =
await file.GetBasicPropertiesAsync();
string fileSize = string.Format("{0:n0}", basicProperties.Size);
fileProperties.Add("File size: " + fileSize + " bytes");
fileProperties.Add("Date modified: " + basicProperties.DateModified);
// Define property names to be retrieved for Extended properties.
const string dateAccessedProperty = "System.DateAccessed";
const string fileOwnerProperty = "System.FileOwner";
var propertyNames = new List <string>();
propertyNames.Add(dateAccessedProperty);
propertyNames.Add(fileOwnerProperty);
// Get extended properties.
IDictionary <string, object> extraProperties =
await file.Properties.RetrievePropertiesAsync(propertyNames);
// Get date-accessed property.
var propValue = extraProperties[dateAccessedProperty];
if (propValue != null)
{
fileProperties.Add("Date accessed: " + propValue);
}
// Get file-owner property.
propValue = extraProperties[fileOwnerProperty];
if (propValue != null)
{
fileProperties.Add("File owner: " + propValue);
}
FileProperties = fileProperties;
}
