[
{
"Id": "161162",
"ThreadId": "48295",
"Html": "I need to open an existing archive, add a file (without altering the original saved archive) and insert the whole thing into the output stream for download. The following code will get the job done but with a poor user experience.
\r\n
\r\nResponse.Clear();
\r\nResponse.ContentType = "application/zip";
\r\nResponse.AddHeader("content-disposition", "filename=" + _FileName);
\r\nResponse.AppendHeader("Content-Encoding", "application/x-zip-compressed");
\r\nResponse.BufferOutput = false;
\r\n
\r\n// create a new zip and insert into output stream
\r\nusing (ZipFile zip = new ZipFile(Response.OutputStream))
\r\n{
\r\n // add the original zip file requested
\r\n zip.AddFile(Server.MapPath(_FilePath + _FileName));
\r\n
\r\n // add readme file
\r\n zip.AddFile(Server.MapPath(_FilePath + "ReadMe.txt"));
\r\n
\r\n zip.Save();
\r\n zip.Dispose();
\r\n Response.End();
\r\n}
\r\n
\r\nThe result is a zip file that contains both the original requested\r\ndownload zip + the new file, so the user has to unzip an archive that\r\ncontains yet another zipped archive containing the files they\r\noriginally requested.
\r\n
\r\nIs it possible to simply open an archive and insert that into the filestream, rather than creating a new archive directly into the filestream? I found a post on another forum that indicated that the following code should work, but it does not -- the Save() method will not allow Response.OutputStream as a valid parameter.
\r\n
\r\n// open existing saved zip file
\r\nusing (ZipFile zip = ZipFile.Read(Server.MapPath(_FilePath + _FileName)))
\r\n{
\r\n // add readme file
\r\n zip.AddFile(Server.MapPath(_FilePath + "ReadMe.txt"));
\r\n
\r\n // insert into output stream
\r\n zip.Save(Response.OutputStream);
\r\n zip.Dispose();
\r\n Response.End();
\r\n}
\r\n
\r\nPlease help. Thanks!
\r\n",
"PostedDate": "2009-02-23T15:00:36.253-08:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "161192",
"ThreadId": "48295",
"Html": ""the Save method will not allow...."
\r\n
\r\nWhy won't it allow that? What is the error you are getting? a compile-time error or a Runtime exception?
\r\nmore info please?
\r\nI believe what you are trying should work.
\r\n",
"PostedDate": "2009-02-23T16:23:11.583-08:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "161195",
"ThreadId": "48295",
"Html": "Thanks, Cheeso. The error I'm getting is compile-time:
\r\n
\r\nThe best overloaded method match for 'Ionic.Utils.Zip.ZipFile.Save(string)' has some invalid arguments
\r\nArgument '1': cannot convert from 'System.IO.Stream' to 'string'
\r\n
\r\nThe Save() method seems to only want a string.
\r\n
\r\n",
"PostedDate": "2009-02-23T16:28:45.167-08:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "161198",
"ThreadId": "48295",
"Html": "Ah.
\r\nWhat version of DotNetZip are you using? In v1.6, there was no overload of the Save() method that accepted a Stream. This was added in v1.7, which is the latest stable version.
\r\nYou can download it from the releases tab.\r\n",
"PostedDate": "2009-02-23T16:41:23.423-08:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "161208",
"ThreadId": "48295",
"Html": "Thanks, Cheeso! I downloaded 1.7 and now it works perfectly.
\r\n",
"PostedDate": "2009-02-23T17:10:43.643-08:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "161219",
"ThreadId": "48295",
"Html": "Super! That was easy.\r\n",
"PostedDate": "2009-02-23T18:19:53.993-08:00",
"UserRole": null,
"MarkedAsAnswerDate": null
}
]