Second Life of a Hungarian SharePoint Geek

October 6, 2011

Determining the path of the virtual directory for a SharePoint web application from Visual Studio

Filed under: CKS.Dev, SP 2010, Visual Studio — Tags: , , — Peter Holpar @ 11:41

The other day I was to add a minor extension to my customized version of CKS.Dev. If I select a deployable item (or a folder containing such items) in Solution Explorer, the extension should display a custom menu item that opens the deployment location using Windows Explorer.

It is similar to the standard Visual Studio 2010 menu item Open Folder in Windows Explorer, but instead of opening the original location, this menu should open the corresponding folder in the 14 hive (for items deployed to {SharePointRoot}) or in the InetPub the (for items deployed to {WebApplicationRoot}).

// BTW, I already added my own version of Open Folder in Windows Explorer to Visual Studio 2008 (and another one that opens the folder in the command shell) a few years ago and so was happy to welcome it built into VS 2010. Seems that other developers missed that feature as well.

It was easy to determine the root of the SharePoint installation (that is the 14 hive). Assuming you have a reference to an ISharePointProject (let’s call it project)  this path is available as project.ProjectService.SharePointInstallPath (the property is populated from the registry hive HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\14.0 with the Location value ). Actually, the current version of CKS.Dev uses exactly this way to get the path in the QuickDeploymentUtilities.SubstituteRootTokens static method. However, there is nothing that handles the {WebApplicationRoot} token.

So my first idea was to create a custom SharePoint command to retrieve the path of the virtual directory for the SharePoint application set for the current project in Visual Studio. But before doing so, I should have known how to get the value on the server side.

The path we need is available as a DirectoryInfo value in the Path property of the SPIisSettings class (Microsoft.SharePoint.Administration namespace, Microsoft.SharePoint assembly). To get the SPIisSettings instance corresponding to our web application we could use either the IisSettings property or the GetIisSettingsWithFallback method of the SPWebApplication class. In both cases we should specify the zone we need info about.

But after analyzing the Path property using Reflector it turned out that Microsoft has already created the command we need: the GetWebApplicationLocalPath method can be found in the SharePointCommands class (Microsoft.VisualStudio.SharePoint.Commands namespace, Microsoft.VisualStudio.SharePoint.Commands.Implementation.v4 assembly in GAC).

Note: If you check the SharePointCommands class you can see there are a lot of useful commands implemented in this class, and there are many more in other (usually not public) classes provided by Visual Studio 2010. I spent a few days last year with discovering the possibilities of these commands and I can assure you there are a few real gems among them. I’ve been planning a series of blog posts about this topic since then, but unfortunately I missed the time to publish them at the level I would like to do. So might be I will publish them in a kind of raw format to help your work. I think if you are at least aware of the existence of these commands it is a large step into the right direction.

Having the GetWebApplicationLocalPath method found (that is the Microsoft.VisualStudio.SharePoint.Commands.GetWebApplicationLocalPath command) it is quite trivial to get the path of the web application root:

String webApplicationRoot = project.SharePointConnection.ExecuteCommand<String>("Microsoft.VisualStudio.SharePoint.Commands.GetWebApplicationLocalPath");

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