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    <p>I have two components at work the application executable itself and a web-service (SOAP) which provides version details and file downloads.</p> <p>The application calls a method on the SOAP service to ask for the number of files in the project (project is identified by using the application.exename usually).</p> <p>The soap service gets its info from an INI file, which has entries like:</p> <blockquote> <p>[ProjectName]</p> <p>NumberOfFiles=2</p> <p>File1=myapp.exe;1.0.0.1</p> <p>File2=mydll.dll;1.0.0.2</p> </blockquote> <p>You just update this file at the same time as uploading your new files.</p> <p>The process of updating the application this:</p> <ol> <li><p>Get number of files available on the web service</p></li> <li><p>For each file, the application asks for the name and version number from the SOAP server.</p></li> <li><p>The application compares this information to its own version info and decides if the file needs updating, building a local list of files that need updating.</p></li> <li><p>For each file that needs updating the application downloads the file to filename.ext.new</p></li> <li><p>Finally, the application renames all filename.ext to filename.ext.old and renames filename.ext.new to filename.ext and then restarts itself. (No real need for an external app to restart your own program).</p></li> </ol> <p>Note 1, that you may have to ask for elevation to replace files, depending on where you install your files.</p> <p>Note 2: be kind to your users, think carefully before you force updates on users.</p> <p>Note 3: You cannot delete a running exe, but you can rename it and then restart the new version.</p> <p>Edit===</p> <p>For some reference data files which cannot contain version information resources, you can have entires like File99=MyDataFile;1.1.2011 the 3 elements to the version number indicates to the client that it should check against the file date/stamp. </p>
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