RevitLinkType & Cloud model

[minet.axel]

Hello,

1) How to check if a RevitLinkType comes from the cloud (BIM 360)?

Here is the method I use to determine if the model is from the cloud. Is this valid?

        public static bool IsLinkedModel(RevitLinkType revitLinkType)
        {
            IDictionary<ExternalResourceType, ExternalResourceReference> r = revitLinkType.GetExternalResourceReferences();

            ExternalResourceReference reference = r[ExternalResourceTypes.BuiltInExternalResourceTypes.RevitLink];

            var dictinfo = reference.GetReferenceInformation();

            if (dictinfo.ContainsKey("LinkedModelProjectId") && dictinfo.ContainsKey("LinkedModelModelId"))
                return true;

            return false;
        }

2) Is it necessary to use the Load () function to determine the path of the file ?, Because currently I use this function but sometimes the InSessionPath variable is empty.

    public static string GetPath(RevitLinkType revitLinkType)
        {
            IDictionary<ExternalResourceType, ExternalResourceReference> r = revitLinkType.GetExternalResourceReferences();

            ExternalResourceReference reference = r[ExternalResourceTypes.BuiltInExternalResourceTypes.RevitLink];

            string sessionPath = reference.InSessionPath;

            return sessionPath;
        }

Discussion link: https://thebuildingcoder.typepad.com/blog/2019/06/accessing-bim360-cloud-links-thumbnail-and-dynamo....

 // Obtain all external resource references 
  // (saying BIM360 Cloud references and local 
  // file references this time)

  ISet<ElementId> xrefs = ExternalResourceUtils
    .GetAllExternalResourceReferences( doc );

  string caption = "BIM360 Links";

  try
  {
    int n = 0;
    var msg = string.Empty;

    foreach( ElementId eid in xrefs )
    {
      var elem = doc.GetElement( eid );
      if( elem == null ) continue;

      // Get RVT document links only this time

      var link = elem as RevitLinkType;
      if( link == null ) continue;

      var map = link.GetExternalResourceReferences();
      var keys = map.Keys;

      foreach( var key in keys )
      {
        var reference = map[key];

        // Contains Forge BIM360 ProjectId 
        // (i.e., LinkedModelModelId) and 
        // ModelId (i.e., LinkedModelModelId) 
        // if it's from BIM360 Docs. 
        // They can be used in calls to
        // ModelPathUtils.ConvertCloudGUIDsToCloudPath.

        var dictinfo = reference.GetReferenceInformation();

        // Link Name shown on the Manage Links dialog

        var displayName = reference.GetResourceShortDisplayName();
        var path = reference.InSessionPath;
      }

      try
      {
        // Load model temporarily to get the model 
        // path of the cloud link

        var result = link.Load();

        // Link ModelPath for Revit internal use

        var mdPath = result.GetModelName();

        link.Unload( null );

        // Convert model path to user visible path, 
        // i.e., saved Path shown on the Manage Links 
        // dialog

        var path = ModelPathUtils
          .ConvertModelPathToUserVisiblePath( mdPath );

        // Reference Type shown on the Manage Links dialog

        var refType = link.AttachmentType;

        msg += string.Format( "{0} {1}\r\n", 
          link.AttachmentType, path );

        ++n;
      }
      catch( Exception ex ) // never catch all exceptions!
      {
        TaskDialog.Show( caption, ex.Message );
      }
    }

    caption = string.Format( "{0} BIM360 Link{1}", 
      n, Util.PluralSuffix( n ) );

    TaskDialog.Show( caption, msg );
  }
  catch( Exception ex )
  {
    TaskDialog.Show( caption, ex.Message );
  }

This returns the path well:

var path = ModelPathUtils
          .ConvertModelPathToUserVisiblePath( mdPath );

But this one is empty:

 var path = reference.InSessionPath;