Iterating through all Web Applications in a SharePoint farm

Iterating through SPSiteCollection and SPWebCollection is a pretty simple, because getting these collections is a simple.

SharePoint API doesn’t provide any method to get collection of all Web Applications in a farm. Here we need to write more code, than we are getting collections of SPSite or SPWeb.

  • SPWebService provides collection of SPWebApplication, but it is only a part of all Web Applications, because SPFarm have many SP Web Services.
  • Getting all services in a SP Farm:
    • SPServiceCollection services = SPFarm.Local.Services;
  • Here we should choose only Services which is of type SPWebService
    • iterating through all services in a SPServiceCollection and check which is of type SPWebService
    • if (curService is SPWebService) …
  • Now we can iterate through all services and all web applications inside them

The final code can be something like this:


SPServiceCollection services = SPFarm.Local.Services;


foreach (SPService curService in services)


  if (curService is SPWebService)


    SPWebService webService = (SPWebService)curService;


    foreach (SPWebApplication webApp in webService.WebApplications)


      // here you can do something with webApp





  • More simple implementation without a iteration through all SPService's and a checking for a SPWebService

    SPFarm farm=SPWebService.ContentService.Farm;

    SPWebApplicationCollection webAppColl = SPWebService.ContentService.WebApplications;

    if (webAppColl != null)


                   foreach (SPWebApplication spWebApp in webAppColl)


    // do your stuff here



  • The original blog post is correct.

    The previous comment references 'SPWebService.ContentService' which only returns the current SPWebService.

    To iterate all web applications you need all SPWebService object belonging to a farm as returned by 'SPFarm.Local.Services' or 'New SPWebServiceCollection(SPFarm.Local)'.

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