c#实现metro文件压缩解压示例

在1.zip中增加一张新图片

            //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);
                }
            }
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把1.jpg从1.zip中删除

导出1.jpg,newFile为要到出的文件
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