Question System.IO.Compression difficulties

[stulish]

Hi guys i am trying to get the ZipArchive of System.IO.Compression working.

I have used:

Imports System.IO
Imports System.IO.Compression

and the code is:

ZipFile.CreateFromDirectory("D:\Temp", "D:\Local", CompressionLevel.Optimal, False)

I keep getting a:

UnauthorizedAccessException was unhandled:

Access to the path 'D:\Local' is denied.

I checked the Drive and Folder permissions and have full access, i then tried writing a text file to the folder and this worked with no problems, is there something i have missed with the CreateFromDirectory to create a zip file of all folders in the temp directory??

Thanks

Stu

 

[stulish]

Just realized i haven't given the output file a name LOL, i am getting tired

ZipFile.CreateFromDirectory("D:\Temp", "D:\Local\Output.zip", CompressionLevel.Optimal, False)

Sorry for Posting irrelevant stuff

Stu

 

[stulish]

On another point if i wanted to compress the files and save one on a local hard drive and one on a back-up hard drive, would it be better to compress to the local folder and then copy the zipped file to the back up (rather than compress to both locations), i am just thinking that the Zip compression will require more processing than a simple copy. What is the best way to ensure the file is completely zipped before copying??

Thanks

Stu

 

[jmcilhinney]

Yes, you should compress once and then copy the archive. Unless I'm mistaken, CreateFromDirectory is synchronous so the file is completely zipped before it returns.

 

[stulish]

Thanks, i thought so, but always nice to ask from the experts