/// <summary>
/// Reads the contents of a text file and displays the results in a TextBox.
/// </summary>
/// <param name="_selectedFileObject">The file selected in the ListBox.</param>
/// <returns>A Boolean value that indicates whether the text file was successfully read.</returns>
internal async Task <object[]> ReadTextFileAsync(string selectedItemID)
{
string fileContents = string.Empty;
object[] results = new object[] { fileContents, false };
try
{
// Make sure we have a reference to the SharePoint client
var spClient = await AuthenticationHelper.EnsureSharePointClientCreatedAsync("MyFiles");
// Get a handle on the selected item.
IItemFetcher thisItemFetcher = spClient.Files.GetById(selectedItemID);
IFileFetcher thisFileFetcher = thisItemFetcher.ToFile();
var myFile = await thisFileFetcher.ExecuteAsync();
// Check that the selected item is a .txt file.
if (!myFile.Name.EndsWith(".txt") && !myFile.Name.EndsWith(".xml"))
{
results[0] = string.Empty;
results[1] = false;
return(results);
}
Microsoft.Office365.SharePoint.FileServices.File file = myFile as Microsoft.Office365.SharePoint.FileServices.File;
// Download the text file and put the results into a string. This results in a call to the service.
using (Stream stream = await file.DownloadAsync())
{
using (StreamReader reader = new StreamReader(stream))
{
results[0] = await reader.ReadToEndAsync();
results[1] = true;
}
}
}
catch (NullReferenceException)
{
results[1] = false;
}
catch (ArgumentException)
{
results[1] = false;
}
return(results);
}
async Task<StorageFile> DownloadFileAsync(File file)
{
StorageFolder temporaryFolder = ApplicationData.Current.TemporaryFolder;
StorageFile invoice =
await temporaryFolder.CreateFileAsync(file.Name,
Windows.Storage.CreationCollisionOption.ReplaceExisting);
var stream = await file.DownloadAsync();
using (var reader = new DataReader(stream.AsInputStream()))
{
await reader.LoadAsync((uint)stream.Length);
var buffer = new byte[(int)stream.Length];
reader.ReadBytes(buffer);
await FileIO.WriteBytesAsync(invoice, buffer);
}
return invoice;
}
internal async Task <bool> DownloadFileAsync(string selectedItemID)
{
var results = false;
try
{
// Make sure we have a reference to the SharePoint client
var spClient = await AuthenticationHelper.EnsureSharePointClientCreatedAsync("MyFiles");
// Get a handle on the selected item.
IItemFetcher thisItemFetcher = spClient.Files.GetById(selectedItemID);
IFileFetcher thisFileFetcher = thisItemFetcher.ToFile();
var myFile = await thisFileFetcher.ExecuteAsync();
Microsoft.Office365.SharePoint.FileServices.File file = myFile as Microsoft.Office365.SharePoint.FileServices.File;
// Download the file and put the results into a string. This results in a call to the service.
using (Stream stream = await file.DownloadAsync())
{
// TODO: save file to users locker
// Create a new file. If the file already exists, it will be overwritten.
using (var fileStream = new FileStream(@"C:\hosting\WebApp1\Downloads\" + myFile.Name, FileMode.Create, FileAccess.Write))
{
stream.CopyTo(fileStream);
}
}
results = true;
}
catch (Exception exc)
{
throw new Exception("Error occured while downloading file: ", exc);
}
return(results);
}
