How to take web app offline while publishing?

Question

Very often, when I hit Publish in VS13, I get the site to compile but when uploading I get the error saying that a file is busy.

Updating file (MyAzureSite\PrecompiledApp.config).

C:...\v12.0\Web\Microsoft.Web.Publishing.targets(4255,5):

Error ERROR_FILE_IN_USE: Web deployment task failed.

(The file 'PrecompiledApp.config' is in use.

Learn more at http://go.microsoft.com/fwlink/?LinkId=221672#ERROR_FILE_IN_USE.)

When I follow the link provided, it's suggested that I should go for enabling the appOffline rule. "Sure!", I think to myself. But how?! I've googled it, only to get a bunch of hits on the file that's supposed to replace the site while publishing. However, I get no info on how to get rid of my little problem.

I went the easy way and downloaded a publishing profile from my Azure web site and now I'm using it (you know, ALT+B+H).

Right now I resolve the problem by going to the portal for Azure and manually take the site off-line. Then I can publish and after that I take the site on-line. Highly impractical and painfully tedious.

What is causing this and how do I kill it?

Answer 1

You can easily configure it in a publishing profile which .pubxml. All you need to do is just add the element to the PropertyGroup as shown below:

<PropertyGroup>

 <EnableMSDeployAppOffline>true</EnableMSDeployAppOffline>  ...

</PropertyGroup>

Rest you can refer in this document by Microsoft: https://docs.microsoft.com/en-us/previous-versions/aspnet/ee942158(v=vs.110)#app_offline