/// <summary>
///
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
/// <param name="Password"></param>
private void Load(Stream input, Stream output, string Password)
{
//Release some resources:
if (this._package != null)
{
this._package.Close();
this._package = null;
}
if (this._stream != null)
{
this._stream.Close();
this._stream.Dispose();
this._stream = null;
}
if (Password != null)
{
Stream encrStream = new MemoryStream();
CopyStream(input, ref encrStream);
EncryptedPackageHandler eph=new EncryptedPackageHandler();
Encryption.Password = Password;
this._stream = eph.DecryptPackage((MemoryStream)encrStream, Encryption);
}
else
{
this._stream = output;
CopyStream(input, ref this._stream);
}
try
{
this._package = Package.Open(this._stream, FileMode.Open, FileAccess.ReadWrite);
}
catch (Exception ex)
{
EncryptedPackageHandler eph = new EncryptedPackageHandler();
if (Password == null && EncryptedPackageHandler.IsStorageILockBytes(eph.GetLockbyte((MemoryStream)_stream)) == 0)
{
throw new Exception("Can not open the package. Package is an OLE compound document. If this is an encrypted package, please supply the password", ex);
}
else
{
throw (ex);
}
}
//Clear the workbook so that it gets reinitialized next time
this._workbook = null;
}
internal byte[] GetAsByteArray(bool save)
{
if(save) Workbook.Save();
_package.Close();
Byte[] byRet = new byte[Stream.Length];
long pos = Stream.Position;
Stream.Seek(0, SeekOrigin.Begin);
Stream.Read(byRet, 0, (int)Stream.Length);
//Encrypt Workbook?
if (Encryption.IsEncrypted)
{
EncryptedPackageHandler eph=new EncryptedPackageHandler();
var ms = eph.EncryptPackage(byRet, Encryption);
byRet = ms.ToArray();
}
Stream.Seek(pos, SeekOrigin.Begin);
Stream.Close();
return byRet;
}
/// <summary>
/// Copies the Package to the Outstream
/// The package is closed after it has been saved
/// </summary>
/// <param name="OutputStream">The stream to copy the package to</param>
public void SaveAs(Stream OutputStream)
{
File = null;
Save();
if (Encryption.IsEncrypted)
{
//Encrypt Workbook
Byte[] file = new byte[Stream.Length];
long pos = Stream.Position;
Stream.Seek(0, SeekOrigin.Begin);
Stream.Read(file, 0, (int)Stream.Length);
EncryptedPackageHandler eph = new EncryptedPackageHandler();
var ms = eph.EncryptPackage(file, Encryption);
CopyStream(ms, ref OutputStream);
}
else
{
CopyStream(_stream, ref OutputStream);
}
}
/// <summary>
/// Saves all the components back into the package.
/// This method recursively calls the Save method on all sub-components.
/// We close the package after the save is done.
/// </summary>
public void Save()
{
try
{
Workbook.Save();
if (File == null)
{
_package.Close();
}
else
{
if (System.IO.File.Exists(File.FullName))
{
try
{
System.IO.File.Delete(File.FullName);
}
catch (Exception ex)
{
throw (new Exception(string.Format("Error overwriting file {0}", File.FullName), ex));
}
}
if (Stream is MemoryStream)
{
_package.Close();
var fi = new FileStream(File.FullName, FileMode.Create);
//EncryptPackage
if (Encryption.IsEncrypted)
{
byte[] file = ((MemoryStream)Stream).ToArray();
EncryptedPackageHandler eph = new EncryptedPackageHandler();
var ms = eph.EncryptPackage(file, Encryption);
fi.Write(ms.GetBuffer(), 0, (int)ms.Length);
ms.Close();
}
else
{
fi.Write(((MemoryStream)Stream).GetBuffer(), 0, (int)Stream.Length);
Stream.Close();
}
fi.Close();
}
else
{
System.IO.File.WriteAllBytes(File.FullName, GetAsByteArray(false));
}
}
}
catch (Exception ex)
{
if (File == null)
{
throw (ex);
}
else
{
throw (new InvalidOperationException(string.Format("Error saving file {0}", File.FullName), ex));
}
}
}
private void ConstructNewFile(Stream stream, string password)
{
_stream = stream;
if (File != null) File.Refresh();
if (File != null && File.Exists)
{
if (password != null)
{
var encrHandler = new EncryptedPackageHandler();
Encryption.IsEncrypted = true;
Encryption.Password = password;
_stream = encrHandler.DecryptPackage(File, Encryption);
encrHandler = null;
}
else
{
ReadFile();
}
try
{
_package = Package.Open(_stream, FileMode.Open, FileAccess.ReadWrite);
}
catch (Exception ex)
{
if (password == null && EncryptedPackageHandler.IsStorageFile(File.FullName) == 0)
{
throw new Exception("Can not open the package. Package is an OLE compound document. If this is an encrypted package, please supply the password", ex);
}
else
{
throw (ex);
}
}
}
else
{
_package = Package.Open(_stream, FileMode.Create, FileAccess.ReadWrite);
CreateBlankWb();
}
}
/// <summary>
/// Create a new file from a template
/// </summary>
/// <param name="template">An existing xlsx file to use as a template</param>
/// <param name="password">The password to decrypt the package.</param>
/// <returns></returns>
private void CreateFromTemplate(FileInfo template, string password)
{
if (template != null) template.Refresh();
if (template.Exists)
{
_stream = new MemoryStream();
if (password != null)
{
Encryption.IsEncrypted = true;
Encryption.Password = password;
var encrHandler = new EncryptedPackageHandler();
_stream = encrHandler.DecryptPackage(template, Encryption);
encrHandler = null;
//throw (new NotImplementedException("No support for Encrypted packages in this version"));
}
else
{
byte[] b = System.IO.File.ReadAllBytes(template.FullName);
_stream.Write(b, 0, b.Length);
}
try
{
_package = Package.Open(_stream, FileMode.Open, FileAccess.ReadWrite);
}
catch (Exception ex)
{
if (password == null && EncryptedPackageHandler.IsStorageFile(template.FullName)==0)
{
throw new Exception("Can not open the package. Package is an OLE compound document. If this is an encrypted package, please supply the password", ex);
}
else
{
throw (ex);
}
}
}
else
throw new Exception("Passed invalid TemplatePath to Excel Template");
//return newFile;
}
