topic Re: Update ProjectParameter CategorySet without loosing values in Revit API Forum

Update ProjectParameter CategorySet without loosing values

lwlXUTTT — Wed, 16 Aug 2023 16:27:24 GMT

Dear All,

is there a way to update existing ProjectParameter (e.g add new category to categorySet) differently than using ReInsert method from BindingMap? The problem with this one is that it removes existing ProjectParam and later creates new with new CategorySet, therefore already-specified and stored in this Parameter values would be gone!

ReInsert method:

https://www.revitapidocs.com/2023/7b613771-310d-6d89-4b69-475a68033f73.htm

any help much appreciated,

Lukasz

Re: Update ProjectParameter CategorySet without loosing values

architect.bim — Wed, 16 Aug 2023 16:42:35 GMT

Hello!
I think there is no straightforward solution to this problem. But this topic has already been discussed here and here.

Re: Update ProjectParameter CategorySet without loosing values

Mohamed_Arshad — Wed, 16 Aug 2023 16:47:30 GMT

HI @lwlXUTTT

I already answered for the issue. Kindly Check the Below Link and Reference Code.

URL :https://forums.autodesk.com/t5/revit-api-forum/adding-categories-to-existing-parameter-binding/m-p/12088231#M72638

Script

//Global Variables InstanceBinding instanceBinding = null; Definition def = null; //Category Need to Add to the Existing Prameter Bindings Category cat = Category.GetCategory(doc, BuiltInCategory.OST_Assemblies); //Get Instance Binding From Document var map = doc.ParameterBindings.ForwardIterator(); //Iterate using Iterator while (map.MoveNext()) { //Get the Parameter need to add def = map.Key as Definition; if (def.Name == "Demo") { instanceBinding = map.Current as InstanceBinding; } } //Get Existing Category Set From the Binding CategorySet existingSet = instanceBinding.Categories; if(!existingSet.Contains(cat)) { existingSet.Insert(cat); } //Adding Category to Exsting Instance Binding (Without changing any parameter) using (Transaction addCategory = new Transaction(doc,"Add Category")) { addCategory.Start(); //Re-Insert Categories to Exsting Instance Binding instanceBinding.Categories = existingSet; doc.ParameterBindings.ReInsert(def, instanceBinding); addCategory.Commit(); }

Hope this Helps 🙂

Re: Update ProjectParameter CategorySet without loosing values

Mohamed_Arshad — Wed, 16 Aug 2023 16:51:54 GMT

HI @architect.bim
I have solved this issue. Without losing value I can be able to re-insert new Category for Existing Parameters Bindings. Can you please suggest any idea on this 🙂

URL : https://forums.autodesk.com/t5/revit-api-forum/adding-categories-to-existing-parameter-binding/m-p/12088231#M72638

Re: Update ProjectParameter CategorySet without loosing values

lwlXUTTT — Wed, 16 Aug 2023 22:34:00 GMT

workaround with saved values to Cache solved the issue partially, I will mark it as a solution -> problem exists for example, when project parameters are used in KeySchedules -> after reinserting, they are gone from key schedule