Find what pages custom blocks are used on.

Dan Butcher

Vote:

Hi there,

Looking for a little assistance here as I'm trying to learn the ropes with EpiServer.

I'm trying to put together some logic to get a list of all our custom blocks and list out every page these blocks are used on. Fortunately all our custom blocks inherit an abstract class called GlobalBlockData.

I've made a good start thus far & been able to get a list of all the blocks in a List of ContentUsage but at this point im stuck.

Strangely the usages collection (List<ContentUsage>) seems to have the same entry a few times and I can't work out why - I know that a block only exists twice but I see 11 entries - This is only set up in one language so why am I seeing multiples?

From this point I now need to get the absoloute URLs for the apges these are used on.

Is anyone able to help please?

var _contentTypeRepo = ServiceLocator.Current.GetInstance<IContentTypeRepository>();
var _contentModelUsage = ServiceLocator.Current.GetInstance<IContentModelUsage>();
var _linkRepo = ServiceLocator.Current.GetInstance<IContentSoftLinkRepository>();
var _contentRepo = ServiceLocator.Current.GetInstance<IContentRepository>();


//Get all custom blocks which inherit the abstract class GlobalBlockDataIEnumerable<GlobalBlockData> exporters = typeof(GlobalBlockData)
   .Assembly.GetTypes()
   .Where(t => t.IsSubclassOf(typeof(GlobalBlockData)) && !t.IsAbstract)
   .Select(t => (GlobalBlockData)Activator.CreateInstance(t));

     foreach (GlobalBlockData block in exporters)
     {
          Type type = block.GetType();
          ContentType contentType = _contentTypeRepo.Load(type);

          if (! _contentModelUsage.IsContentTypeUsed(contentType))
          {
               //Block Not currently in use
               table.Rows.Add(contentType.Name, "NOT IN USE", "NOT IN USE");
          } 
          else {
               //Block In use....
               IList<ContentUsage> usages = 
                  _contentModelUsage.ListContentOfContentType(contentType);
               foreach (ContentUsage item in usages)
               {
                    IEnumerable<ReferenceInformation> references = 
                      _contentRepo.GetReferencesToContent(item.ContentLink, false);
                       
                  
               // THIS IS WHERE IM STUCK
               }
         }
}

#231047

Edited, Nov 18, 2020 0:35

Ravindra S. Rathore

Vote:

Hi,

You can try this-

https://stackoverflow.com/questions/49454291/episerver-how-can-i-find-out-if-a-block-is-being-used-on-any-published-page

#231051

Nov 18, 2020 7:33

Tomas Hensrud Gulla

Vote:

When you view a block in Episerver edit mode, you will see this information.

Try digging around with DotPeek, or ILSpy, and see what Episerver does. My guess is that it involves IContentSoftLinkRepository.

#231053

Nov 18, 2020 8:02

Johan Petersson

Vote:

You're almost there :) The Stack Overflow link should help you using the IContentSoftLinkRepository. You also need to get distinct model usage since content versions counts against usage. Something like this:

//// var _urlResolver = ServiceLocator.Current.GetInstance<IUrlResolver>();

// Use distinct since usage also counts against content versions
var usages = _contentModelUsage.ListContentOfContentType(contentType)
    .Select(x => x.ContentLink.ToReferenceWithoutVersion())
    .Distinct();

foreach (var usage in usages)
{
    // Find all pages where the block is used
    var references = _linkRepo.Load(usage, reverse: true)
        .Where(x => x.SoftLinkType == ReferenceType.PageLinkReference && ContentReference.IsNullOrEmpty(x.OwnerContentLink) == false)
        .Select(x => x.OwnerContentLink);

    foreach (var reference in references)
    {
        var externalUrl = _urlResolver.GetUrl(
            reference,
            string.Empty,
            new UrlResolverArguments
            {
                ContextMode = ContextMode.Default,
                ForceAbsolute = true }
            );
    }
}

#231056

Nov 18, 2020 9:22

Dan Butcher

Vote:

Thanks for the help. This gives me some results but weirdly some usages return no reference & some references dont return a URL.

Any ideas why this might be?

I was guessing perhaps its because the block is nested within another block etc...

#231376

Nov 25, 2020 23:11

Dan Butcher

Vote:

Thanks for the help. This gives me some results but weirdly some usages return no reference & some references dont return a URL.

Any ideas why this might be?

I was guessing perhaps its because the block is nested within another block etc...

#231377

Nov 25, 2020 23:11

Bartosz Sekula

Vote:

not sure if that's relevant for you but soft link indexer only indexes published content

#232705

Dec 02, 2020 12:05

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Find what pages custom blocks are used on.