2/5/2012 3:18:22 AM
RE:select multiple related documents
Regrettably, bulk operation for related documents is not supported in UI. However, you can achieve it using API and mainly following method:
CMS.TreeEngine.RelationshipProvider.AddRelationship(int leftNodeId, int rightNodeId, int relationshipNameId);
More info about this method can be found in API reference file. You can also see live example and take an inspiration from it in \Relationships\AddRelatedDocument.ascx.cs, SaveRelationship method.