This helpnet article gives instructions on how to have the installer automatically detect the next available site number and use it to install the website. http://helpnet.flexerasoftware.com/installshield22helplib/helplibrary/IISPortSiteNo.htm
However, this will have the installer still attempt to add a new site even if a site with the same name already exists.
Discussion
The following VbScript code can check for an existing website and get the Site Number.
Dim objW3SVC, objIisWebSite
Set objW3SVC = GetObject("IIS://localhost/W3SVC")
For Each objIisWebSite In objW3SVC If objIisWebSite.Class = "IIsWebServer" Then
MsgBox objIisWebSite.Name ' SiteNumber MsgBox objIisWebSite.ServerComment ' SiteName if objIisWebSite.ServerComment = Session.Property("SSWEBSITE") then Property("SSNEXTNEWSITENUMBER")=objIisWebSite.Name end if end if next
The MSI Property SSWEBSITE should be set the site name being checked. The MSI Property SSNEXTNEWSITENUMBER is where the site number is stored if the existing Website is found.
This vbscript can be called from a vbscript custom action.
