Creating virtual directories in IIS express

IIS express configuration is managed by applicationhost.config. You can find it in

Users\\Documents\IISExpress\config folder.

Inside you can find the sites section that hold a section for each IIS Express configured site.

Add (or modify) a site section like this:

<site name="WebSiteWithVirtualDirectory" id="20">
   <application path="/" applicationPool="Clr4IntegratedAppPool">
     <virtualDirectory path="/" physicalPath="c:\temp\website1" />
   </application>
   <application path="/OffSiteStuff" applicationPool="Clr4IntegratedAppPool">
     <virtualDirectory path="/" physicalPath="d:\temp\SubFolderApp" />
   </application>
    <bindings>
      <binding protocol="http" bindingInformation="*:1132:localhost" />
   </bindings>
</site>

Practically you need to add a new application tag in your site for each virtual directory. You get a lot of flexibility because you can set different configuration for the virtual directory (for example a different .Net Framework version)

EDIT Thanks to Fevzi Apaydın to point to a more elegant solution.

You can achieve same result by adding one or more virtualDirectory tag to the Application tag:

<site name="WebSiteWithVirtualDirectory" id="20">
   <application path="/" applicationPool="Clr4IntegratedAppPool">
     <virtualDirectory path="/" physicalPath="c:\temp\website1" />
     <virtualDirectory path="/OffSiteStuff" physicalPath="d:\temp\SubFolderApp" />
   </application>
    <bindings>
      <binding protocol="http" bindingInformation="*:1132:localhost" />
   </bindings>
</site>

Reference:

Application tag for a Site

Virtual Directory tag

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@Be.St.'s aprroach is true, but incomplete. I'm just copying his explanation with correcting the incorrect part.

IIS express configuration is managed by applicationhost.config. You can find it in

Users\\Documents\IISExpress\config folder.

Inside you can find the sites section that hold a section for each IIS Express configured site.

Add (or modify) a site section like this:

<site name="WebSiteWithVirtualDirectory" id="20">
   <application path="/" applicationPool="Clr4IntegratedAppPool">
     <virtualDirectory path="/" physicalPath="c:\temp\website1" />
     <virtualDirectory path="/OffSiteStuff" physicalPath="d:\temp\SubFolderApp" />
   </application>
   <bindings>
      <binding protocol="http" bindingInformation="*:1132:localhost" />
   </bindings>
</site>

Instead of adding a new application block, you should just add a new virtualDirectory element to the application parent element.

Edit - Visual Studio 2015

If you're looking for the applicationHost.config file and you're using VS2015 you'll find it in:

[solution_directory]/.vs/config/applicationHost.config

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In VS2013 I did this in the following steps:

1.Right-click the web application project and hit Properties

2.View the "Web" tab of the Properties page

3.Under Servers, with "IIS Express" being the default choice of the dropdown, in the "Project Url" change the url using the port number to one that suits you. For example I deleted the port number and added "/MVCDemo4" after the localhost.

4.Click the "Create Virtual Directory" button.

5.Run your project and the new url will be used

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If you're using Visual Studio 2013 (may require Pro edition or higher), I was able to add a virtual directory to an IIS Express (file-based) website by right-clicking on the website in the Solution Explorer and clicking Add > New Virtual Directory. This added an entry to the applicationhost.config file as with the manual methods described here.

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A new option is Jexus Manager for IIS Express,

https://blog.lextudio.com/2014/10/jexus-manager-for-iis-express/

It is just the management tool you know how to use.

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I had to make the entry in the [project].vs\config\applicationhost.config file.

Prior to this, it worked from deployment but not from code.

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In answer to the further question -

"is there anyway to apply this within the Visual Studio project? In a multi-developer environment, if someone else check's out the code on their machine, then their local IIS Express wouldn't be configured with the virtual directory and cause runtime errors wouldn't it?"

I never found a consistant answer to this anywhere but then figured out you could do it with a post build event using the XmlPoke task in the project file for the website -

<Target Name="AfterBuild">
    <!-- Get the local directory root (and strip off the website name) -->
    <PropertyGroup>
        <LocalTarget>$(ProjectDir.Replace('MyWebSite\', ''))</LocalTarget>
    </PropertyGroup>

    <!-- Now change the virtual directories as you need to -->
    <XmlPoke XmlInputPath="..\..\Source\Assemblies\MyWebSite\.vs\MyWebSite\config\applicationhost.config" 
        Value="$(LocalTarget)AnotherVirtual" 
        Query="/configuration/system.applicationHost/sites/site[@name='MyWebSite']/application[@path='/']/virtualDirectory[@path='/AnotherVirtual']/@physicalPath"/>
</Target>

You can use this technique to repoint anything in the file before IISExpress starts up. This would allow you to initially force an applicationHost.config file into GIT (assuming it is ignored by gitignore) then subsequently repoint all the paths at build time. GIT will ignore any changes to the file so it's now easy to share them around.

In answer to the futher question about adding other applications under one site:

You can create the site in your application hosts file just like the one on your server. For example:

  <site name="MyWebSite" id="2">
    <application path="/" applicationPool="Clr4IntegratedAppPool">
      <virtualDirectory path="/" physicalPath="C:\GIT\MyWebSite\Main" />
      <virtualDirectory path="/SharedContent" physicalPath="C:\GIT\SharedContent" />
      <virtualDirectory path="/ServerResources" physicalPath="C:\GIT\ServerResources" />
    </application>
    <application path="/AppSubSite" applicationPool="Clr4IntegratedAppPool">
      <virtualDirectory path="/" physicalPath="C:\GIT\AppSubSite\" />
      <virtualDirectory path="/SharedContent" physicalPath="C:\GIT\SharedContent" />
      <virtualDirectory path="/ServerResources" physicalPath="C:\GIT\ServerResources" />
    </application>
    <bindings>
      <binding protocol="http" bindingInformation="*:4076:localhost" />
    </bindings>
  </site>

Then use the above technique to change the folder locations at build time.

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Visual Studio Studio Professional 2017

Go to the /Solution/.vs directory

Open applicationHost.config file Expand node and look for the correct child node (based on running port) `

Add `

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I had something else, the files itself where inaccessible in a SBS envirenment.

Delete the files in the config folder (if you can't open them!) and replace them with a copy of the folder on your own local pc.

Fixed it for me :)

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