/// <summary>Asynchronously deletes all the <b>ZipArchiveEntries</b> specified from the zip file.</summary>
public async Task DeleteFromZipArchiveAsync(IEnumerable <string> paths, string zipFileName)
{
using (var memoryStream = new MemoryStream(await FileAsync.ReadAllBytesAsync(zipFileName)))
{
using (var zip = new ZipArchive(memoryStream, ZipArchiveMode.Update))
{
foreach (var entry in zip.Entries.Where(e => paths.Contains(e.FullName)).ToArray())
{
if (entry != null)
{
try { entry.Delete(); }
catch (Exception ex)
{
string entryDescription = entry.FullName.IndexOfAny(XBRLConstants.DelimiterChars) == -1 ?
entry.FullName :
entry.FullName.Substring(entry.FullName.LastIndexOfAny(XBRLConstants.DelimiterChars) + 1);
OnError(new ZipErrorEventArgs(
string.Format("Error deleting '{0}' from '{1}'. {2}.",
entryDescription,
Path.GetFileName(zipFileName),
ex.Message)));
}
}
}
}
await FileAsync.WriteAllBytesAsync(zipFileName, memoryStream.ToArray());
}
}
/// <summary>Save a file (or files) to zip asynchronously, using asynchronous IO.</summary>
/// <param name="paths">The files and/or directories to create a zip file.</param>
/// <param name="zipFileName">The path of the zip file to create.</param>
/// <param name="filesToExclude">(Optional) Any file names that should be excluded.</param>
/// <returns>A Task that represents completion of the method.</returns>
public async Task CreateZipArchiveAsync(IEnumerable <string> paths, string zipFileName, params string[] filesToExclude)
{
var files = await BuildFileCollectionAsync(paths, filesToExclude);
using (var stream = new FileStream(zipFileName, FileMode.Create, FileAccess.ReadWrite, FileShare.None, XBRLConstants.LargeBufferSize, true))
{
// ZipArchiveMode.Update mode is required here to allow setting entries' last write time, after creating and writing them.
using (var zip = new ZipArchive(stream, ZipArchiveMode.Update))
{
var count = 0;
var total = files.Count();
foreach (var kvp in files)
{
try
{
using (var memoryStream = new MemoryStream(await FileAsync.ReadAllBytesAsync(kvp.Key)))
{
if (memoryStream.Length > 0)
{
ZipArchiveEntry entry;
using (var zipStream = (entry = zip.CreateEntry(kvp.Value, CompressionLevel.Optimal)).Open())
{
await memoryStream.CopyToAsync(zipStream, XBRLConstants.LargeBufferSize);
}
var fileInfo = new FileInfo(kvp.Key);
entry.LastWriteTime = new DateTimeOffset(fileInfo.LastWriteTime);
OnProgress(new ZipProgressEventArgs(kvp.Key, kvp.Value, ++count, total, ZipAction.Add));
}
else
{
total--;
}
}
}
catch (Exception ex)
{
OnError(new ZipErrorEventArgs(string.Format("Error adding '{0}'. {1}.", Path.GetFileName(kvp.Key), ex.Message)));
}
}
}
}
}
/// <summary>Add a file (or files) to a zip asynchronously, using asynchronous IO.</summary>
/// <remarks>This is exactly the same as the <see cref="CreateZipArchiveAsync"/> method,
/// except that it updates an existing zip file.</remarks>
/// <param name="paths">The files and/or directories to add to a zip file.</param>
/// <param name="zipFileName">The path of the zip file to update.</param>
/// <param name="filesToExclude">(Optional) Any file names that should be excluded.</param>
/// <returns>A Task that represents completion of the method.</returns>
public async Task UpdateZipArchiveAsync(IEnumerable <string> paths, string zipFileName, params string[] filesToExclude)
{
var files = await BuildFileCollectionAsync(paths, filesToExclude);
/* Note the FileShare parameter needs to be FileShare.Read here. Otherwise, if the zip file
* is already open in another process, the FileStream constructor will throw an exception. */
using (var stream = new FileStream(zipFileName, FileMode.Open, FileAccess.ReadWrite, FileShare.Read, XBRLConstants.LargeBufferSize, true))
{
using (var zip = new ZipArchive(stream, ZipArchiveMode.Update))
{
var count = 0;
foreach (var kvp in files)
{
try
{
using (var memoryStream = new MemoryStream(await FileAsync.ReadAllBytesAsync(kvp.Key)))
{
if (memoryStream.Length > 0)
{
ZipArchiveEntry entry;
using (var zipStream = (entry = zip.CreateOrOpenEntry(kvp.Value)).Open())
{
await memoryStream.CopyToAsync(zipStream, XBRLConstants.LargeBufferSize);
}
var fileInfo = new FileInfo(kvp.Key);
entry.LastWriteTime = new DateTimeOffset(fileInfo.LastWriteTime);
OnProgress(new ZipProgressEventArgs(kvp.Key, kvp.Value, ++count, files.Count(), ZipAction.Add));
}
}
}
catch (Exception ex)
{
OnError(new ZipErrorEventArgs(string.Format("Error updating '{0}' with '{1}'. {2}.", Path.GetFileName(zipFileName), Path.GetFileName(kvp.Key), ex.Message)));
}
}
}
}
}
