/// <summary>
/// Method to open an existing storage file
/// </summary>
/// <param name="_filename">Full path of Zip file to open</param>
/// <param name="_access">File access mode as used in FileStream constructor</param>
/// <returns>A valid ZipStorer object</returns>
public static async Task <ZipStorer> Open(IZipStorerProvider _Provider, string _filename, bool isWriteAccess)
{
Stream stream = await _Provider.File_OpenStream(_filename, isWriteAccess); //new FileStream(_filename, FileMode.Open, _access == FileAccess.Read ? FileAccess.Read : FileAccess.ReadWrite);
ZipStorer zip = Open(_Provider, stream, isWriteAccess);
zip.FileName = _filename;
return(zip);
}
/// <summary>
/// Method to create a new zip storage in a stream
/// </summary>
/// <param name="_stream"></param>
/// <param name="_comment"></param>
/// <returns>A valid ZipStorer object</returns>
public static ZipStorer Create(IZipStorerProvider _Provider, Stream _stream, string _comment = "")
{
ZipStorer zip = new ZipStorer();
zip.Provider = _Provider;
zip.Comment = _comment;
zip.ZipFileStream = _stream;
zip.IsWriteAccess = true;
return(zip);
}
/// <summary>
/// Method to create a new storage file
/// </summary>
/// <param name="_filename">Full path of Zip file to create</param>
/// <param name="_comment">General comment for Zip file</param>
/// <returns>A valid ZipStorer object</returns>
public async static Task <ZipStorer> Create(IZipStorerProvider _Provider, string _filename, string _comment = "")
{
Stream stream = await _Provider.File_CreateStream(_filename); //new FileStream(_filename, FileMode.Create, FileAccess.ReadWrite);
ZipStorer zip = Create(_Provider, stream, _comment);
zip.Comment = _comment;
zip.FileName = _filename;
return(zip);
}
/// <summary>
/// Method to open an existing storage from stream
/// </summary>
/// <param name="_stream">Already opened stream with zip contents</param>
/// <param name="_access">File access mode for stream operations</param>
/// <returns>A valid ZipStorer object</returns>
public static ZipStorer Open(IZipStorerProvider _Provider, Stream _stream, bool isWriteAccess)
{
if (!_stream.CanSeek && !isWriteAccess)
{
throw new InvalidOperationException("Stream cannot seek");
}
ZipStorer zip = new ZipStorer();
zip.Provider = _Provider;
//zip.FileName = _filename;
zip.ZipFileStream = _stream;
zip.IsWriteAccess = isWriteAccess;
if (zip.ReadFileInfo())
{
return(zip);
}
throw new System.IO.InvalidDataException();
}
