文件名似乎OK.也许他们不是相对的名字,那是问题吗?
private void trySharpZipLib(ArrayList filesToInclude) { // Response header Response.Clear(); Response.ClearHeaders(); Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.StatusCode = 200; // http://community.icsharpcode.net/forums/p/6946/20138.aspx long zipSize = calculateZipSize(filesToInclude); string contentValue = string.Format("attachment; filename=moshe.zip;" ); // + " size={0}",zipSize); Response.ContentType = "application/octet-stream"; //"application/zip"; Response.AddHeader("Content-Disposition",contentValue); Response.Flush(); using (ZipOutputStream zipOutputStream = new ZipOutputStream(Response.OutputStream) ) { zipOutputStream.SetLevel(0); foreach (string f in filesToInclude) { string filename = Path.Combine(Server.MapPath("."),f); using (FileStream fs = File.OpenRead(filename)) { ZipEntry entry = new ZipEntry(ZipEntry.CleanName(filename)) { DateTime = File.GetCreationTime(filename),CompressionMethod = CompressionMethod.Stored,Size = fs.Length }; zipOutputStream.PutNextEntry(entry); byte[] buffer = new byte[fs.Length]; // write to zipoutStream via buffer. // The zipoutStream is directly connected to Response.Output (in the constructor) ICSharpCode.SharpZipLib.Core.StreamUtils.Copy(fs,zipOutputStream,buffer); Response.Flush(); // for immediate response to user } // .. using file stream }// .. each file } Response.Flush(); Response.End(); }
解决方法
Response.Clear(); Response.BufferOutput = false; string archiveName= String.Format("archive-{0}.zip",DateTime.Now.ToString("yyyy-MMM-dd-HHmmss")); Response.ContentType = "application/zip"; // see http://support.microsoft.com/kb/260519 Response.AddHeader("content-disposition","attachment; filename=" + archiveName); using (ZipFile zip = new ZipFile()) { // filesToInclude is a IEnumerable<String> (String[] or List<String> etc) zip.AddFiles(filesToInclude,"files"); zip.Save(Response.OutputStream); } // Response.End(); // will throw an exception internally. Response.Close(); // ...more code here...
如果要对zip进行密码加密,则在AddFiles()之前插入以下行:
zip.Password = tbPassword.Text; // optional zip.Encryption = EncryptionAlgorithm.WinZipAes256; // optional
如果你想要一个自解压档案,那么用zip.SaveSelfExtractor()替换zip.Save().
附录; some people have commented to me,DotNetZip是“不好”,因为它在流出之前创建内存中的整个ZIP.不是这样的.当您调用AddFiles时,库会创建一个条目列表 – 表示要压缩的东西状态的对象.调用Save之前,没有压缩或加密.如果您指定一个流到Save()调用,那么所有的压缩字节都直接流向客户端.
在SharpZipLib模型中,可以创建一个条目,然后将其流出,然后创建另一个条目,并将其流出,等等.使用DotNetZip,您的应用程序首先创建完整的条目列表,然后将其全部输出.这两种方法都不一定比其他方法“快”,尽管对于长列表的文件,例如30,000,SharpZipLib的时间到第一字节将更快.另一方面,我不建议动态创建具有30,000个条目的zip文件.
编辑
As of DotNetZip v1.9,DotNetZip supports a ZipOutputStream as well. I still think it’s simpler to do things the way I’ve shown here,though.
有些人有这样的情况,他们的zip内容对所有用户“大致相同”,但有一些文件是不同的每一个. DotNetZip也是很好的.您可以从文件系统文件读取zip存档,更新几个条目(添加一些,删除几个等),然后保存到Response.OutputStream.在这种情况下,DotNetZip不会重新压缩或重新加密您尚未更改的任何条目.快多了.
当然DotNetZip适用于任何.NET应用程序,而不仅仅是ASP.NET.所以你可以保存到任何流.
如果您想要更多信息,请查看site或dotnetzip forums发布.