StorageFile jpg = await KnownFolders.PicturesLibrary.GetFileAsync("1.jpg");             StorageFile zip = await KnownFolders.PicturesLibrary.GetFileAsync("1.zip");             //把上面这句改成如下就成了压缩文件             //StorageFile zip = await KnownFolders.PicturesLibrary.CreateFileAsync(jpg.DisplayName+".zip",CreationCollisionOption.ReplaceExisting); 　　 　　             using (ZipArchive archive = new ZipArchive((await zip.OpenAsync(FileAccessMode.ReadWrite)).AsStream(), ZipArchiveMode.Update))             {                 ZipArchiveEntry readmeEntry = archive.CreateEntry(jpg.Name);                 byte[] buffer = WindowsRuntimeBufferExtensions.ToArray(await FileIO.ReadBufferAsync(jpg));                 using (var writer = readmeEntry.Open())                 {                     await writer.WriteAsync(buffer, 0, buffer.Length);                 }             }

StorageFile zip = await KnownFolders.PicturesLibrary.GetFileAsync("1.zip");             using (ZipArchive archive = new ZipArchive((await zip.OpenAsync(FileAccessMode.ReadWrite)).AsStream(), ZipArchiveMode.Update))             {                 //删除文件                 archive.GetEntry("1.jpg").Delete();             }

StorageFile zip = await KnownFolders.PicturesLibrary.GetFileAsync("1.zip");             using (ZipArchive archive = new ZipArchive((await zip.OpenAsync(FileAccessMode.ReadWrite)).AsStream(), ZipArchiveMode.Update))             { 　　　　　　　　　　　　ZipArchiveEntry zipArchiveEntry = archive.GetEntry("1.jpg"). 　　　　　　　　　　　　using (Stream fileData = zipArchiveEntry.Open())                             {                                 StorageFile newFile = await KnownFolders.PicturesLibrary.CreateFileAsync(zipArchiveEntry.FullName, CreationCollisionOption.ReplaceExisting);                                 using (IRandomAccessStream newFileStream = await newFile.OpenAsync(FileAccessMode.ReadWrite))                                 {                                     using (Stream s = newFileStream.AsStreamForWrite())                                     {                                         await fileData.CopyToAsync(s);                                         await s.FlushAsync();                                     }                                 }                             } 　　　　　　}