public async Task OpenAppFile(string fileName)
{
var removableDevices = KnownFolders.RemovableDevices;
var externalDrives = await removableDevices.GetFoldersAsync();
var usbDrive = externalDrives.Single(e => e.DisplayName.Contains("USB DISK"));
StorageFile appconfig = await usbDrive.CreateFileAsync(
string.Format("{0}.jpg", fileName),
CreationCollisionOption.OpenIfExists);
using (StreamReader reader = new StreamReader(await appconfig.OpenStreamForReadAsync()))
{
var data = await reader.ReadToEndAsync();
AppData = Newtonsoft.Json.JsonConvert.DeserializeObject <MyAppData>(data);
}
}
public async Task OpenAppFile(string fileName)
{
try // Create a local files (open and add text if exist) for writing a short text
{
// Create sample file, open if exists
string fn = fileName + "-Sequensial.txt";
Windows.Storage.StorageFolder storageFolder =
Windows.Storage.ApplicationData.Current.LocalFolder;
Windows.Storage.StorageFile sampleFile =
await storageFolder.CreateFileAsync(fn,
Windows.Storage.CreationCollisionOption.OpenIfExists);
// Writing to the file
await Windows.Storage.FileIO.AppendTextAsync(sampleFile, "Swift as a shadow" + Environment.NewLine);
}
catch (Exception ex)
{
DebugTextBox.Text += ex.Message;
}
try // Create a local files (open and add text if exist) for writing a short text
{
// Create sample stream file, open if exists
string fn = fileName + "-Stream.txt";
Windows.Storage.StorageFolder storageFolder =
Windows.Storage.ApplicationData.Current.LocalFolder;
Windows.Storage.StorageFile sampleFile =
await storageFolder.CreateFileAsync(fn,
Windows.Storage.CreationCollisionOption.OpenIfExists);
var stream = await sampleFile.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite);
using (var outputStream = stream.GetOutputStreamAt(stream.Size))
{
// We'll add more code here in the next step.
using (var dataWriter = new Windows.Storage.Streams.DataWriter(outputStream))
{
dataWriter.WriteString("DataWriter has methods to write to various types, such as DataTimeOffset." + Environment.NewLine);
await dataWriter.StoreAsync();
await outputStream.FlushAsync();
}
}
stream.Dispose(); // Or use the stream variable (see previous code snippet) with a using statement as well.
}
catch (Exception ex)
{
DebugTextBox.Text += ex.Message;
}
try // Initial/create OneDrive stream for write/append text
{
// Create file Stream towards OneDrive datastore
}
catch (Exception ex)
{
DebugTextBox.Text += ex.Message;
}
//OK, then we are ready to read/write file
/* try // Try to open file at USB drive
* {
* var removableDevices = KnownFolders.RemovableDevices;
* var externalDrives = await removableDevices.GetFoldersAsync();
* var usbDrive = externalDrives.Single(e => e.DisplayName.Contains("USB DISK"));
* string fn = usbDrive.Name + string.Format("{0}.jpg", fileName);
*
* DebugTextBox.Text += "Will try to open:" + fn + " on USB Drive:" + usbDrive.Name;
*
* StorageFile appconfig = await usbDrive.CreateFileAsync(
* fn,
* CreationCollisionOption.OpenIfExists);
*
* using (StreamReader reader = new StreamReader(await appconfig.OpenStreamForReadAsync()))
* {
* var data = await reader.ReadToEndAsync();
* AppData = Newtonsoft.Json.JsonConvert.DeserializeObject<MyAppData>(data);
* }
* }
* catch (Exception ex)
* {
* // error
* DebugTextBox.Text += ex.Message;
* }
*/
try
{
// Open and read the file
// Create/open sample file; replace if exists.
string fn = fileName + ".jpg";
Windows.Storage.StorageFolder storageFolder =
Windows.Storage.ApplicationData.Current.LocalFolder;
DebugTextBox.Text += "Will try to open: " + fn + " in " + storageFolder.Path;
StorageFile appconfig = await storageFolder.CreateFileAsync(fn,
Windows.Storage.CreationCollisionOption.OpenIfExists);
using (StreamReader reader = new StreamReader(await appconfig.OpenStreamForReadAsync()))
{
var data = await reader.ReadToEndAsync();
AppData = Newtonsoft.Json.JsonConvert.DeserializeObject <MyAppData>(data);
}
}
catch (Exception ex)
{
// Exceptopn
DebugTextBox.Text += ex.Message;
}
}