Example of pulling enum as string

[Nathan.HilsonN67V6]

Can somebody give me an example of how to pull an enum as a string variable? I've been researching and can't find anything specific for revit api enums. Specifically for Fabrication parts/parameters. We use a custom content pack (building data) but I'm assuming the methods/classes will be similar? For example if I wanted to get the service name. 

I'm able to pull the name (which is named default//doesn't help) through a collection but I can't figure out how to dig into the "FabricationPart" field where all the information I want is. Still new to Revit api so may be something obvious I'm missing. This is how I'm pulling the name so maybe I could tweak this to pull the service?

InitializeComponent();
            Doc = doc;
            ICollection<Element> FabricationPipework =
                new FilteredElementCollector(Doc, Doc.ActiveView.Id).OfCategory(BuiltInCategory.OST_FabricationPipework)
                .ToElements();
            ICollection<Element> FabricationDuctwork =
                new FilteredElementCollector(Doc, Doc.ActiveView.Id).OfCategory(BuiltInCategory.OST_FabricationDuctwork)
                .ToElements();
            ICollection<Element> FabricationHangers =
                new FilteredElementCollector(Doc, Doc.ActiveView.Id).OfCategory(BuiltInCategory.OST_FabricationHangers)
                .ToElements();
            {
                foreach (Element element in FabricationPipework)
                    comboBox2.Items.Add(element.Category.Name);
            }
            {
                foreach (Element element in FabricationDuctwork)
                    comboBox2.Items.Add(element.Category.Name);
            }
            {
                foreach (Element element in FabricationHangers)
                    comboBox2.Items.Add(element.Category.Name);
            }

[naveen.kumar.t]

Hi @Nathan.HilsonN67V6 ,

I don't exactly understand what you are trying to do.

If you want to access the service name parameter you can use the below code.

FabricationPart fabricationPart=null;
                Parameter param=fabricationPart.get_Parameter(BuiltInParameter.FABRICATION_SERVICE_NAME);
                string s = param.AsValueString();

(Or)

FabricationPart fabricationPart;
                string s = fabricationPart.ServiceName;

If this is not what you want, Could you please explain your issue in detail?

[naveen.kumar.t]

Hi @Nathan.HilsonN67V6 ,

If you want to get fabrication parts with a specific service name,you can use ElementParameterFilter.

https://www.revitapidocs.com/2023/b0b40351-690c-eb5d-30c2-d4447a42fda1.htm 

[Nathan.HilsonN67V6]

My goal is to get a collection of the used services in the active view and assign them to a selectable combobox. I think I my have the right idea but incorrect methods. I've rewritten the code for the direction that I want to go in. 

                {
                    FamilySymbol familySymbol = doc.GetElement(new ElementId(Autodesk.Revit.DB.BuiltInParameter.ID_PARAM)) as FamilySymbol;

                    List<Autodesk.Revit.DB.Parameter> myParameters = new List<Autodesk.Revit.DB.Parameter>();
                    System.Collections.IEnumerator symbolParamEnumerator = familySymbol.Parameters.GetEnumerator();
                    while (symbolParamEnumerator.MoveNext())
                    {
                        Autodesk.Revit.DB.Parameter parameter = (Autodesk.Revit.DB.Parameter)symbolParamEnumerator;

                        if (parameter.Definition is InternalDefinition internalDefinition)
                        {
                            if (internalDefinition.BuiltInParameter == Autodesk.Revit.DB.BuiltInParameter.FABRICATION_SERVICE_NAME)
                            {
                                myParameters.Add(parameter);
                                comboBox2.Items.Add(myParameters);
                            }
                        }
                    }
                }

It's throwing me an instance error for this specific example. I'm open to all ideas and changes. I found examples databinding but I'm not too familiar with that. 

[Nathan.HilsonN67V6]

So to make it a bit clearer getting the parameter "Fabrication Service Name" in a collection or list as a named value not the id.

[naveen.kumar.t · Accepted solution]

Hi @Nathan.HilsonN67V6 ,

In your screenshot, the service name is "DHWR.."

You want to add this service name to the combo box, is my understanding of your issue correct?

If yes, then please take a look at the below sample code

UIApplication uiapp = commandData.Application;
            UIDocument uidoc = uiapp.ActiveUIDocument;
            Application app = uiapp.Application;
            Document doc = uidoc.Document;

            JLForm form = new JLForm(doc);
            form.ShowDialog();

internal class JLForm : System.Windows.Forms.Form
    {
        public string ReturnValue1 = null;
        System.Windows.Forms.ComboBox mybox = null;
        Document d = null;
        public JLForm(Document doc)
        {
            d = doc;
            InitializeComponent(d);
        }

        private void InitializeComponent(Document doc)
        {
            // Creating and setting the properties of label
            Label l = new Label();
            l.Location = new System.Drawing.Point(22, 10);
            l.Size = new System.Drawing.Size(99, 18);
            l.Text = "Select Service Name";

            // Adding this label to the form
            this.Controls.Add(l);

            // Creating and setting the properties of comboBox
            mybox = new System.Windows.Forms.ComboBox();
            mybox.Location = new System.Drawing.Point(127, 7);
            mybox.Size = new Size(216, 26);
            mybox.MaxLength = 3;
            mybox.DropDownStyle = ComboBoxStyle.DropDown;

            FilteredElementCollector Collector = new FilteredElementCollector(doc).OfClass(typeof(FabricationPart)).WhereElementIsNotElementType();
            foreach (Element e in Collector)
            {
                Parameter p = e.get_Parameter(BuiltInParameter.FABRICATION_SERVICE_NAME);
                if(p!=null)
                {
                    mybox.Items.Add(p.AsValueString());
                }
            }

            // Adding this ComboBox to the form
            this.Controls.Add(mybox);

            Button button = new Button();
            button.Location = new System.Drawing.Point(76, 50);
            button.Size = new Size(100, 18);
            button.Text = "Click me";
            button.Click += new EventHandler(buttonClicked);
            this.Controls.Add(button);
        }

        private void buttonClicked(object sender, EventArgs e)
        {
            string selectedServiceName = mybox.SelectedItem as string;
            /*
             * Do your work here
             */ 
        }
    }

I hope this helps.

[Nathan.HilsonN67V6]

This is almost exactly what I was looking for. So I pulled the filter section of the code to mines & I get this error. 

            FilteredElementCollector Collector = new FilteredElementCollector(doc).OfClass(typeof(FabricationPart)).WhereElementIsNotElementType();
            foreach (Element e in Collector)
            {
                Parameter p = e.get_Parameter(BuiltInParameter.FABRICATION_SERVICE_NAME);
                if(p!=null)
                {
                    mybox.Items.Add(p.AsValueString());
                }

I then played around with it a bit and came up with this that will get me using but not the actual name. 

        {      
            InitializeComponent();
            Doc = doc;
            ICollection<Element> FabricationPipework =
               new FilteredElementCollector(Doc, Doc.ActiveView.Id).OfCategory(BuiltInCategory.OST_FabricationPipework)
                .OfClass(typeof(FabricationPart))
                .OfCategory(BuiltInCategory.OST_FabricationPipework)
                .ToElements();
            foreach (Element element in FabricationPipework)
            {
comboBox2.Items.Add(element.get_Parameter(Autodesk.Revit.DB.BuiltInParameter.FABRICATION_SERVICE_NAME));
            }

In order for me to get it to work I had to add a cast for the enums built in parameters.

[Nathan.HilsonN67V6]

Update: It worked!!! It was a small error on my end with the enumerations. Thanks a ton. 

[naveen.kumar.t]

Great, I am glad that it worked and your issue is now resolved.

[Nathan.HilsonN67V6]

Here's how I got mines to work for any others having the same issue. 

        public enum BuiltInParameter
        {
     //****************************** AS VALUESTRINGS ************************************
            FABRICATION_SERVICE_PARAM = -1140339, 
            ELEM_FAMILY_AND_TYPE_PARAM = -1002052, 
            ELEM_CATEGORY_PARAM = -1140362, 
            ELEM_FAMILY_PARAM = -1002051, 
            FABRICATION_INSULATION_SPEC = -1140947, 
            FABRICATION_LEVEL_PARAM = -1140916, 
            FABRICATION_PART_CUT_TYPE = -1140970, 
            FABRICATION_PART_ITEM_NUMBER = -1140975, 
            FABRICATION_PART_LENGTH = -1140944, 
            FABRICATION_PART_MATERIAL = -1140909, 
            FABRICATION_PART_NOTES = -1140977, 
            FABRICATION_PART_WEIGHT = -1140913,
     //****************************** AS STRINGS ************************************
            FABRICATION_SERVICE_NAME = -1140973,
            FABRICATION_PRI_SIZE = -1141010, 
            FABRICATION_PRODUCT_DATA_INSTALL_TYPE = -1140910, 
            FABRICATION_PRODUCT_DATA_LONG_DESCRIPTION = -1140902, 
            FABRICATION_PRODUCT_DATA_MATERIAL_DESCRIPTION = -1140904, 
        }

public //formName(Document doc)

     //****************************** Get Fabrication Service Names ************************************
            try
            {
                FilteredElementCollector Collector = new FilteredElementCollector(doc, doc.ActiveView.Id).OfClass(typeof(FabricationPart)).WhereElementIsNotElementType();
                foreach (Element e in Collector)
                {
                    Autodesk.Revit.DB.Parameter v = e.get_Parameter((Autodesk.Revit.DB.BuiltInParameter)BuiltInParameter.FABRICATION_SERVICE_PARAM);
                    if (v != null)
                    {
                        comboBox2.Items.Add(v.AsValueString());
                    }


                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }