How can I programatically download a file from a sharepoint server and lock it?

Question

I would like to download a file from a sharepoint server using C#, check it out, and put a lock on it so no other user can modify that file. After changing the file, I want to check it in again with a comment, and of course remove the lock.

Which is the best way to do it? I read about the SPSite class already, but this seems to be part of the Sharepoint Services which are only available for server operating systems. However, I need to do that from a client running Windows 7.

Any hints how this can be achieved?

Answer 1

Add a Web Reference to the Lists web service, located on your SharePoint server; e.g. http://yourserver/_vti_bin/Lists.asmx to your project.

This web service exposes some basic operations, including the ability to check documents in and out. Checking out a document implicitly locks it from editing by other users. You can download a local copy of the document using the DownloadFile method of the WebClient class. When checking the document back in, the web service allows you to add a comment.