Can you access the mark value from the Revit API?

[willw663499]

I am trying to write a macro for combining of 2 parameters into the mark parameter. I keep getting errors regarding mark not being found. Is the API able to push information into the mark parameter? Below is my code


               		public void Mech_Equip()
			{
				Document doc = this.Document;
				
				string newMechID = "";
				
				using(Transaction trans = new Transaction(doc, "Rename Equipment"))
				{
					trans.Start();
					
					foreach (Element e in new FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_MechanicalEquipment))
					
						OST_MechanicalEquipment Mech = e as OST_MechanicalEquipment;
			
						Parameter paramType = Mech.get_Parameter("TAG_MECH");
						string MechType = paramType.AsString();
						
						Parameter paramInstance = Mech.get_Parameter("EQUIP_IDEN");
						string MechInstance= paramInstance.AsString();
					
						string combinedName = MechType + "-" + MechInstance;
					
					
						// This will assign the new name to the equipment
						BuiltInParameter.ALL_MODEL_MARK = combinedName;
			
						newMechID += combinedName + "\n";
					}
			
					trans.Commit();
							
					{
						TaskDialog.Show ("Mechanical","List has been Updated");
				}
			}
				;

[ColinStark]

You've almost got it, but you're accessing the parameter incorrectly.

Replace

BuiltInParameter.ALL_MODEL_MARK = combinedName;

with:

Parameter markParam = Mech.get_Parameter(BuiltInParameter.ALL_MODEL_MARK);
markParam.Set(combinedName);

You could combine that into one line if you really wanted, but I think it's more clear split into 2.
This also gives you the ability to verify that the parameter is of the correct type (string) if you weren't sure which type of parameter the mark parameter was.

[willw663499]

That makes sense. Now it is telling me that "OST_MechanicalEquipment Mech = e as OST_MechanicalEquipment;" can not be a declaration. Does this mean i filtered it incorrectly?

[floris]

Hi, you have many errors in your code,
Document doc = this.ActiveUIDocument.Document; For make change in your active document
OST_MechanicalEquipment is not a type but a category name. Use this category in a FilterElementCollector for create a list of MechanicalEquipment
You dont need to use newMechID

		public void Mech_Equip()
		{
			
			Document doc = this.ActiveUIDocument.Document;
			
			FilteredElementCollector collector = new FilteredElementCollector(doc);
			collector.OfCategory(BuiltInCategory.OST_MechanicalEquipment).WhereElementIsNotElementType().ToElements();
			
			using(Transaction trans = new Transaction(doc, "Rename Equipment"))
			{
				trans.Start();
				
				foreach (Element Mech in collector){
					
					Parameter paramType = Mech.get_Parameter("TAG_MECH");
					string MechType = paramType.AsString();
					
					Parameter paramInstance = Mech.get_Parameter("EQUIP_IDEN");
					string MechInstance= paramInstance.AsString();
					
					string combinedName = MechType + "-" + MechInstance;
										
					Parameter markParam = Mech.get_Parameter(BuiltInParameter.ALL_MODEL_MARK);
					
					markParam.Set(combinedName);
				
				}
				
				trans.Commit();
			}
		}

HFloris