public static void ZipFile(List<string> files, string strZipFileName, ZipCompressionLevels compression, bool appendZipContents)
{
if (files.Count == 0) { return; }
string tempFolder = Path.Combine(Path.GetTempPath(), "SlyceTempZip");
if (Directory.Exists(tempFolder))
{
DeleteDirectoryBrute(tempFolder);
Directory.CreateDirectory(tempFolder);
// Maybe the OS or anti-virus app denies access to the new
// folder for a while, so let's give it a chance to do its thing.
Thread.Sleep(50);
}
if (appendZipContents && File.Exists(strZipFileName))
{
using (Ionic.Zip.ZipFile zip = Ionic.Zip.ZipFile.Read(strZipFileName))
{
zip.CompressionLevel = ConvertCompressionLevel(compression);
DeleteDirectoryBrute(tempFolder);
Directory.CreateDirectory(tempFolder);
try
{
// Unzip to temp folder
zip.ExtractAll(tempFolder);
}
catch (Exception)
{
// Sometimes, for unknown reasons we get access denied exceptions
DeleteDirectoryBrute(tempFolder);
Directory.CreateDirectory(tempFolder);
// Maybe the OS or anti-virus app denies access to the new
// folder for a while, so let's give it a chance to do its thing.
Thread.Sleep(1000);
zip.ExtractAll(tempFolder);
}
// Delete the current Zip file
try
{
DeleteFileBrute(strZipFileName);
}
catch (UnauthorizedAccessException)
{
if (File.Exists(strZipFileName) && (File.GetAttributes(strZipFileName) & FileAttributes.ReadOnly) != 0)
{
MessageBox.Show("Cannot save because file is readonly: " + strZipFileName, "Cannot Save - ReadOnly", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
MessageBox.Show("Zip failed due to locked files. Try adding [" + tempFolder + "] to the exclusion list in your anti-virus application.", "Cannot Zip - Locked Files", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
throw;
}
}
}
// Copy all new files to the temp folder, deleting existing file if it exists
foreach (string file in files)
{
string newFile = Path.Combine(tempFolder, Path.GetFileName(file));
DeleteFileBrute(newFile);
try
{
File.Copy(file, newFile, true);
}
catch (Exception)
{
// Sometimes, for some reason the temp directory doesn't exist,
// and checking for its existence on the line above doesn't help either!
if (!Directory.Exists(tempFolder))
{
Directory.CreateDirectory(tempFolder);
// Maybe the OS or anti-virus app denies access to the new
// folder for a while, so let's give it a chance to do its thing.
Thread.Sleep(1000);
File.Copy(file, newFile, true);
}
else
{
throw;
}
}
}
// Zip to a new file, not over any existing file. We will copy over the top if we are successful
string tempZipFilename = Path.Combine(Path.GetDirectoryName(strZipFileName),
"~" + Path.GetFileName(strZipFileName));
using (ZipFile targetZip = new ZipFile(tempZipFilename))
{
targetZip.CompressionLevel = ConvertCompressionLevel(compression);
// This adds all of the files in tempFolder to the root of the zip file.
targetZip.AddDirectory(tempFolder);
try
{
targetZip.Save(tempZipFilename);
// Delete existing file
if (File.Exists(strZipFileName))
{
DeleteFileBrute(strZipFileName);
}
File.Move(tempZipFilename, strZipFileName);
}
catch (Exception)
{
int numTries = 0;
bool success = false;
Exception innerEx = null;
while (!success && numTries < 10)
{
numTries++;
// Maybe the OS or anti-virus app denies access to the new
// folder for a while, so let's give it a chance to do its thing.
Thread.Sleep(500);
try
{
targetZip.Save(tempZipFilename);
success = true;
}
catch (Exception ex2)
{
innerEx = ex2;
}
}
if (!success)
{
if (File.Exists(strZipFileName) && (File.GetAttributes(strZipFileName) & FileAttributes.ReadOnly) != 0)
{
MessageBox.Show("Cannot save because file is readonly: " + strZipFileName, "Cannot Save - ReadOnly",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
MessageBox.Show(
"Zip failed due to locked files. Try adding [" + tempFolder +
"] to the exclusion list in your anti-virus application.", "Cannot Zip - Locked Files",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
if (innerEx != null)
{
throw innerEx;
}
else
{
throw;
}
}
else
{
// Delete existing file
if (File.Exists(strZipFileName))
{
DeleteFileBrute(strZipFileName);
}
File.Move(tempZipFilename, strZipFileName);
}
}
}
}
private static CompressionLevel ConvertCompressionLevel(ZipCompressionLevels compression)
{
return (CompressionLevel)Enum.Parse(typeof(CompressionLevel), compression.ToString(), true);
}
public static void ZipFile(List<string> files, string strZipFileName, ZipCompressionLevels compression)
{
ZipFile(files, strZipFileName, compression, true);
}
