| private static CopyStream ( Stream inputStream, Stream &outputStream ) : void | ||
| inputStream | Stream | The input stream. |
| outputStream | Stream | The output stream. |
| Результат | void | |
/// <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)
{
this.File = null;
this.Save();
if (outputStream != _stream)
{
if (this.Encryption.IsEncrypted)
{
#if !MONO
//Encrypt Workbook
Byte[] file = new byte[this.Stream.Length];
long pos = this.Stream.Position;
this.Stream.Seek(0, SeekOrigin.Begin);
this.Stream.Read(file, 0, (int)this.Stream.Length);
EncryptedPackageHandler eph = new EncryptedPackageHandler();
var ms = eph.EncryptPackage(file, this.Encryption);
ExcelPackage.CopyStream(ms, ref outputStream);
#endif
#if MONO
throw new NotSupportedException("Encryption is not supported under Mono.");
#endif
}
else
{
ExcelPackage.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
{
if (this.Stream is MemoryStream && this.Stream.Length > 0)
{
//Close any open memorystream and "renew" then. This can occure if the package is saved twice.
//The stream is left open on save to enable the user to read the stream-property.
//Non-memorystream streams will leave the closing to the user before saving a second time.
this.CloseStream();
}
this.Workbook.Save();
if (this.File == null)
{
if (this.Encryption.IsEncrypted)
{
#if !MONO
var ms = new MemoryStream();
this.Package.Save(ms);
byte[] file = ms.ToArray();
EncryptedPackageHandler eph = new EncryptedPackageHandler();
var msEnc = eph.EncryptPackage(file, Encryption);
ExcelPackage.CopyStream(msEnc, ref _stream);
#endif
#if MONO
throw new NotSupportedException("Encryption is not supported under Mono.");
#endif
}
else
{
this.Package.Save(this.Stream);
}
this.Stream.Flush();
this.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));
}
}
this.Package.Save(this.Stream);
this.Package.Close();
if (this.Stream is MemoryStream)
{
var fi = new FileStream(this.File.FullName, FileMode.Create);
//EncryptPackage
if (this.Encryption.IsEncrypted)
{
#if !MONO
byte[] file = ((MemoryStream)this.Stream).ToArray();
EncryptedPackageHandler eph = new EncryptedPackageHandler();
var ms = eph.EncryptPackage(file, Encryption);
fi.Write(ms.GetBuffer(), 0, (int)ms.Length);
#endif
#if MONO
throw new NotSupportedException("Encryption is not supported under Mono.");
#endif
}
else
{
fi.Write(((MemoryStream)this.Stream).GetBuffer(), 0, (int)this.Stream.Length);
}
fi.Close();
}
else
{
System.IO.File.WriteAllBytes(this.File.FullName, this.GetAsByteArray(false));
}
}
}
catch (Exception ex)
{
if (this.File == null)
{
throw;
}
else
{
throw (new InvalidOperationException(string.Format("Error saving file {0}", this.File.FullName), ex));
}
}
}
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;
}
this._isExternalStream = true;
if (input.Length == 0) // Template is blank, Construct new
{
this._stream = output;
this.ConstructNewFile(password);
}
else
{
Stream ms;
this._stream = output;
if (password != null)
{
#if !MONO
Stream encrStream = new MemoryStream();
ExcelPackage.CopyStream(input, ref encrStream);
EncryptedPackageHandler eph = new EncryptedPackageHandler();
this.Encryption.Password = password;
ms = eph.DecryptPackage((MemoryStream)encrStream, this.Encryption);
#endif
#if MONO
throw new NotSupportedException("Encryption is not supported under Mono.");
#endif
}
else
{
ms = new MemoryStream();
ExcelPackage.CopyStream(input, ref ms);
}
try
{
//this._package = Package.Open(this._stream, FileMode.Open, FileAccess.ReadWrite);
this._package = new Packaging.ZipPackage(ms);
}
catch (Exception ex)
{
#if !MONO
EncryptedPackageHandler eph = new EncryptedPackageHandler();
if (password == null && CompoundDocument.IsStorageILockBytes(CompoundDocument.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;
}
#endif
#if MONO
throw;
#endif
}
}
//Clear the workbook so that it gets reinitialized next time
this._workbook = null;
}