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Asked: 2026-06-14T12:14:43+00:00

I’ve got this below but I want to change it in such a way

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I’ve got this below but I want to change it in such a way that it installs the web application to an existing web site. Currently it installs the website and all the files but then on uninstall also removes all the files, I just want it to add the files as a web applications. How so I go about doing this? 

<?xml version="1.0" encoding="utf-8" ?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi" xmlns:iis="http://schemas.microsoft.com/wix/IIsExtension"
     xmlns:util="http://schemas.microsoft.com/wix/UtilExtension">

  <Fragment>
    <DirectoryRef Id="INSTALLLOCATION">
      <Component Id="C_IISWebsite" Guid="{138B3868-24E8-4D7B-8793-0D254AF349D4}" KeyPath="yes">
        <!-- This does not create a user, it's just an object that's referenced by the WebAppPool component -->
        <util:User Id="WebAppPoolUser" CreateUser="no" Name="[WEB_APP_POOL_IDENTITY_USERNAME]"
                   Password="[WEB_APP_POOL_IDENTITY_PWD]" Domain="[WEB_APP_POOL_IDENTITY_DOMAIN]"/>

        <!-- The "Identity" attritbute below needs to be set to "other" to use the util:User defined above -->
        <iis:WebAppPool Id="WebAppPool" Name="[WEB_APP_POOL_NAME]" Identity="other" User="WebAppPoolUser"/>

        <iis:WebSite Id="DefaultWebSite" Description="[WEBSITE_NAME]" Directory="INSTALLLOCATION" >
          <iis:WebAddress Id="AllUnassigned" Port="80"/>
        </iis:WebSite>

        <iis:WebVirtualDir Id="My.VirtualDir" Alias="mdxWebSite" Directory="INSTALLLOCATION" WebSite="DefaultWebSite">
          <iis:WebApplication Id="Application" Name="mdxWebSite" WebAppPool="WebAppPool" />
        </iis:WebVirtualDir>
      </Component>
    </DirectoryRef>
  </Fragment>
</Wix>
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1 Answer

  1. Editorial Team

    I think your problem has to do with the installer not knowing what to uninstall, and therefore removes the default or parent web site. Take a look at this sample by John Robbins, the key is to store the configuration in the registry so the uninstall knows what to remove, doing the following inside your <Component> ... </Compoonent> element should do it, don’t forget to insert your appropriate names/data and guid.

    <!--The component for installer properties I need to save so they can be used on the uninstall.-->
<Component Id="SetupRegistryValues" Guid="{...}" KeyPath="yes" >
<RegistryValue Root="HKLM" Key="SOFTWARE\CompanyName\ProductName\Install" Name="WebAppName" Value="[WEB_APP_NAME]" Type="string" />
<RegistryValue Root="HKLM" Key="SOFTWARE\CompanyName\ProductName\Install" Name="WebSiteName" Value="[WEBSITE_NAME]" Type="string" />
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