/// <summary>
/// Saves settings using settings document.
/// </summary>
protected virtual void OnSave()
{
if (SettingsDocument != null)
{
SettingsFileOption fileOption = SettingsFileOption.Default;
string extension = Path.GetExtension(FilePath);
if (String.Equals(extension, ".stpe", StringComparison.InvariantCultureIgnoreCase))
{
fileOption = SettingsFileOption.Encrypted;
}
else if (String.Equals(extension, ".stpc", StringComparison.InvariantCultureIgnoreCase))
{
fileOption = SettingsFileOption.Compressed;
}
SettingsDocument.Save(FilePath, fileOption);
}
}
/// <summary>
/// Saves this document to the specified file with the specified file options.
/// </summary>
/// <param name="filename">The filename.</param>
/// <param name="fileOption">The file options.</param>
public void Save(string filename, SettingsFileOption fileOption)
{
if (!File.Exists(filename))
{
string directory = Path.GetDirectoryName(filename);
if (!String.IsNullOrEmpty(directory))
{
Directory.CreateDirectory(directory);
}
}
//FileOptions.WriteThrough specifies that this file will be written directly to disk, and not to a disk cache.
//SettingsDocuments can be used to save App configuration values, and this flag would ensure we've written to disk in an EMO situation
using (FileStream fileStream = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.ReadWrite, _streamBufferSize, FileOptions.WriteThrough))
{
Stream writable = null;
ICryptoTransform encrypter = null;
try
{
switch (fileOption)
{
case SettingsFileOption.Encrypted:
Aes aes = AesManaged.Create();
aes.BlockSize = 128;
aes.KeySize = 256;
aes.IV = _encryptionIV;
aes.Padding = PaddingMode.PKCS7;
aes.Mode = CipherMode.CBC;
aes.Key = _encryptionKey;
encrypter = aes.CreateEncryptor();
writable = new CryptoStream(fileStream, encrypter, CryptoStreamMode.Write);
break;
case SettingsFileOption.Compressed:
writable = new GZipStream(fileStream, CompressionMode.Compress);
break;
default:
writable = fileStream;
break;
}
using (TextWriter file = TextWriter.Synchronized(new StreamWriter(writable)))
{
WriteToFile(file);
}
}
finally
{
if (writable != null)
{
writable.Dispose();
}
if (encrypter != null)
{
encrypter.Dispose();
}
}
}
}
/// <summary>
/// Loads the specified settings file into this settings document by creating the settings node tree based on the file's
/// tab structure. Any line that contains only whitespace or only a comment will not become a <see cref="SettingsNode"/>
/// but will be retained when the file is saved.
/// </summary>
/// <param name="filename">The filename.</param>
/// <param name="fileOption">The file option that was used when the file was saved.</param>
/// <exception cref="FileNotFoundException">The file specified in <c>filename</c> was not found.</exception>
public void Load(string filename, SettingsFileOption fileOption = SettingsFileOption.Default)
{
if (!File.Exists(filename))
{
File.Create(filename).Dispose();
}
using (FileStream file = new FileStream(filename, FileMode.Open, FileAccess.Read))
{
if (fileOption == SettingsFileOption.Default)
{
string extension = Path.GetExtension(filename);
if (String.Equals(extension, ".stpe", StringComparison.InvariantCultureIgnoreCase))
{
fileOption = SettingsFileOption.Encrypted;
}
else if (String.Equals(extension, ".stpc", StringComparison.InvariantCultureIgnoreCase))
{
fileOption = SettingsFileOption.Compressed;
}
}
Stream readable = null;
ICryptoTransform decrypter = null;
try
{
switch (fileOption)
{
case SettingsFileOption.Encrypted:
Aes aes = AesManaged.Create();
aes.BlockSize = 128;
aes.KeySize = 256;
aes.IV = _encryptionIV;
aes.Padding = PaddingMode.PKCS7;
aes.Mode = CipherMode.CBC;
aes.Key = _encryptionKey;
decrypter = aes.CreateDecryptor();
readable = new CryptoStream(file, decrypter, CryptoStreamMode.Read);
break;
case SettingsFileOption.Compressed:
readable = new GZipStream(file, CompressionMode.Decompress);
break;
default:
readable = file;
break;
}
try
{
Logging.Log.Info("Settings", "Opening file '{0}'", filename);
LoadFromStream(new StreamReader(readable));
Logging.Log.Info("Settings", "Loaded file '{0}'", filename);
}
catch (Exception ex)
{
if (readable != file)
{
Logging.Log.Error("Settings", ex);
LoadFromStream(new StreamReader(file));
}
else
{
throw;
}
}
FileOption = fileOption;
Name = filename;
}
finally
{
if (readable != null)
{
readable.Dispose();
}
if (decrypter != null)
{
decrypter.Dispose();
}
}
}
}
