/// <summary>
/// Removes one of many files in storage. It creates a new Zip file.
/// </summary>
/// <param name="zip">Reference to the current Zip object</param>
/// <param name="zfes">List of Entries to remove from storage</param>
/// <returns>True if success, false if not</returns>
/// <remarks>This method only works for storage of type FileStream</remarks>
public static bool RemoveEntries(ref ZipStorer zip, List <ZipFileEntry> zfes)
{
if (!(zip._zipFileStream is FileStream))
{
throw new InvalidOperationException("RemoveEntries is allowed just over streams of type FileStream");
}
//Get full list of entries
var fullList = zip.ReadCentralDir();
//In order to delete we need to create a copy of the zip file excluding the selected items
string tempZipName = Path.GetTempFileName();
string tempEntryName = Path.GetTempFileName();
try
{
var tempZip = Create(tempZipName, string.Empty);
foreach (var zfe in fullList)
{
if (zfes.Contains(zfe))
{
continue;
}
if (zip.ExtractFile(zfe, tempEntryName))
{
tempZip.AddFile(zfe.Method, tempEntryName, zfe.FilenameInZip, zfe.Comment);
}
}
zip.Close();
tempZip.Close();
File.Delete(zip._fileName);
File.Move(tempZipName, zip._fileName);
zip = Open(zip._fileName, zip._access);
}
catch
{
return(false);
}
finally
{
if (File.Exists(tempZipName))
{
File.Delete(tempZipName);
}
if (File.Exists(tempEntryName))
{
File.Delete(tempEntryName);
}
}
return(true);
}
protected virtual Bitmap GetBitmapFromZip(ZipStorer zipStore, int zipFileEntryIndex)
{
var zipFileEntry = ZipEntries[zipFileEntryIndex];
var memoryStream = new MemoryStream((int)zipFileEntry.FileSize);
zipStore.ExtractFile(zipFileEntry, memoryStream);
memoryStream.Position = 0;
var bmp = (Bitmap)Image.FromStream(memoryStream);
memoryStream.Close();
return(bmp);
}
