//private async Task<XDocument> LoadAsync(string path)
//{
// StorageFolder sf = await ApplicationData.Current.LocalFolder.GetFolderAsync(@"data\");
// StorageFile file = await sf.GetFileAsync(Path.GetFileName(path));
// IBuffer ibuf = null;
// byte[] b;
// bool excCaught = false;
// try
// {
// using (IRandomAccessStream ras = await file.OpenReadAsync())
// {
// b = new byte[ras.Size];
// ibuf = await ras.ReadAsync(CryptographicBuffer.CreateFromByteArray(b), (uint)ras.Size, InputStreamOptions.None);
// ras.Dispose();
// }
// }
// catch (System.UnauthorizedAccessException ex)
// {
// excCaught = true;
// }
// if (excCaught)
// {
// using (IRandomAccessStream ras = await file.OpenReadAsync())
// {
// b = new byte[ras.Size];
// ibuf = await ras.ReadAsync(CryptographicBuffer.CreateFromByteArray(b), (uint)ras.Size, InputStreamOptions.None);
// ras.Dispose();
// }
// }
// CryptographicBuffer.CopyToByteArray(ibuf, out b);
// char[] ch = System.Text.Encoding.UTF8.GetChars(b);
// string s = CryptographicBuffer.ConvertBinaryToString(BinaryStringEncoding.Utf8, ibuf);
// s = EncryptionProvider.Decrypt(s, EncryptionProvider.PublicKey);
// StringReader sreader = new StringReader(s);
// while (sreader.Peek() == 65279)
// {
// sreader.Read();
// }
// XDocument xdoc = XDocument.Load(sreader, LoadOptions.None);
// return xdoc;
//}
private async Task <XDocument> LoadAsync(string path)
{
StorageFolder sf = await ApplicationData.Current.LocalFolder.GetFolderAsync(@"data\");
StorageFile file = await sf.GetFileAsync(Path.GetFileName(path));
IBuffer ibuf = null;
byte[] b;
using (IRandomAccessStream ras = await file.OpenReadAsync())
{
using (IInputStream inputStream = ras.GetInputStreamAt(0))
{
ulong size = ras.Size;
DataReader dataReader = new DataReader(inputStream);
await dataReader.LoadAsync((uint)size);
ibuf = dataReader.ReadBuffer((uint)size);
inputStream.Dispose();
}
ras.Dispose();
}
CryptographicBuffer.CopyToByteArray(ibuf, out b);
// char[] ch = System.Text.Encoding.UTF8.GetChars(b);
// string s = CryptographicBuffer.ConvertBinaryToString(BinaryStringEncoding.Utf8, ibuf);
string s = EncryptionProvider.DecryptToString(ibuf);
StringReader sreader = new StringReader(s);
while (sreader.Peek() == 65279)
{
sreader.Read();
}
XDocument xdoc = XDocument.Load(sreader, LoadOptions.None);
return(xdoc);
}