[ { "Id": "254050", "ThreadId": "74268", "Html": "

Using DotNetZip library in my vb.net application, I was able to zip a folder but unable to download. I know there is something missing here but I cannot figure out what. any feedback would be greatly appreciated.

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Private Sub ZipFolder(ByVal FolderToZip As String)
        Response.Clear()
        Response.BufferOutput = False
        app.Events.Write("we are here 1")

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        Dim archiveName As String = String.Format(FolderToZip & ".zip", DateTime.Now.ToString("yyyy-MMM-dd-HHmmss"))
        app.Events.Write("archiveName = " & archiveName)
        Response.ContentType = "application/zip"
        Response.AddHeader("content-disposition", "filename=" + archiveName)
        app.Events.Write("we are here 2")

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        Using zip As ZipFile = New ZipFile()
            zip.AddDirectory(FolderToZip)
            zip.Save(FolderToZip & ".zip")

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            zip.Save(Response.OutputStream)

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            zip.Dispose()
            ' Send the output to the client.
            Response.Flush()
            app.Events.Write("we are here 3")
        End Using
        HttpContext.Current.ApplicationInstance.CompleteRequest()
        ' Response.Close()
        app.Events.Write("we are here 4")
    End Sub

", "PostedDate": "2009-11-05T18:29:29.127-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "254101", "ThreadId": "74268", "Html": "

Seems like you are saving it twice?  Any reason why? 

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I don't know what app.Events.Write() does, but if it is writing to the outputstream, it will cause your download to fail.

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What is the error you are getting, anyway?

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Private Sub ZipFolder(ByVal FolderToZip As String)\r\n        Response.Clear()\r\n        Response.BufferOutput = False\r\n\r\n        Dim archiveName As String = String.Format(FolderToZip & ".zip", DateTime.Now.ToString("yyyy-MMM-dd-HHmmss"))\r\n        Response.ContentType = "application/zip"\r\n        Response.AddHeader("content-disposition", "filename=" + archiveName)\r\n\r\n        Using zip As ZipFile = New ZipFile()\r\n            zip.AddDirectory(FolderToZip)\r\n            zip.Save(Response.OutputStream)\r\n        End Using\r\n        Response.Close()\r\nEnd Sub\r\n\r\n
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", "PostedDate": "2009-11-05T22:00:09.683-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "254119", "ThreadId": "74268", "Html": "

thanks for the reply.

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the app.Events.Write() is just my debugging code - it doesn't effect anything

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I am able to download now but zip.Save(Response.OutputStream) reveals the whole path to the client which is not a very good practice. any suggestion how to remedy this?

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thanks again.

", "PostedDate": "2009-11-05T23:41:42.66-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "254142", "ThreadId": "74268", "Html": "

Yes - set the archiveName this way. (replace the code you have in your method)

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'' get a name for the archive\r\n'' example output: Documents-2009-Nov-06-114211.zip\r\nDim archiveName As String = _\r\n    Path.GetFileName(FolderToZip) & _\r\n    DateTime.Now.ToString("yyyy-MMM-dd-HHmmss")) & _\r\n    ".zip"\r\n\r\n\r\n
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ps: What does the debugging code do ?   If it emits messages into the response outputstream, then it will corrupt the zip file.  If, for example, you use it to update a Web control, enabling these diagnostic messages might cause the zip to break.  Like "The Observer effect."

", "PostedDate": "2009-11-06T00:57:36.96-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "254241", "ThreadId": "74268", "Html": "

The code you mentioned above does not hide the full path. So i am still having trouble with this. 

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the app.event.write writes to an event log - it's just a print statment, that's all. I can not by any means have the "The Observer effect"

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thanks again and looking forward to your reply

", "PostedDate": "2009-11-06T06:30:31.68-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "254248", "ThreadId": "74268", "Html": "

My humble aplogy - it actualy worked and the path is not revealed any more. thank you so much.

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On another note, in another part of my application, I have embeded flash that lets the user selecet a whole bunch of files. Then I have to be able to zip these files in a folder and allow the user to download. The problem is that zip.Save(Response.OutputStream) does not get a chance when flash is involved - and I think that's because Flash is trying to respond as well. Have you ever dealth with Flash and zip download? Do you know of any known issue?

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thanks again.

", "PostedDate": "2009-11-06T06:52:12.227-08:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "254297", "ThreadId": "74268", "Html": "

Ahh, I don't know much about Flash.  and I don't know what you mean by "zip.Save(Response.OutputStream) does not get a chance when flash is involved." 

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I think you might be able to solve your problem by:

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Good luck!

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", "PostedDate": "2009-11-06T08:52:40.033-08:00", "UserRole": null, "MarkedAsAnswerDate": null } ]