Get a list of ParameterGroups in R2025 API

[Extraneous]

I need to get a list BuiltInParameterGroups to show these in a dialog window.

In the previous Revit API versions I used this:

List<BuiltInParameterGroup> groups = 
  Enum.GetValues(typeof(BuiltInParameterGroup)).Cast<BuiltInParameterGroup>().ToList();

How to do the same in Revit API 2025? GroupTypeId isn't Enum and I don't see how to get all possible values.

[jeremy_tammik]

You can use .NET Reflection to iterate over all the members of the GroupTypeId class:

• https://www.revitapidocs.com/2024/cf6883b8-349d-bdc3-3099-b9e7d380ba84.htm
• https://duckduckgo.com/?q=c%23+iterate+class+properties

[Mohamed_Arshad]

Привет @Extraneous 

     As @jeremy_tammik  told, We use typeof keyword from Reflection to extract the property information. Kindly check the below sample code snippet for reference.

Reference Code:

 ///Get all Parameter Group Value in List
            List<PropertyInfo> propertiesInfo = typeof(GroupTypeId).GetProperties().ToList();

            Dictionary<ForgeTypeId, string> builtInParameterNames = new Dictionary<ForgeTypeId, string>();

            ///To Get all BuiltInParameter Group Names
            foreach (PropertyInfo property in propertiesInfo)
            {
                builtInParameterNames.Add(property.GetValue(property)as ForgeTypeId, property.Name);
            }

Спасибо 🙂 Hope this Helps 🙂

[Mohamed_Arshad]

Привет @Extraneous 

   As @jeremy_tammik  told we can use the typeof from Reflection namespace. Kindly check the below code snippet for reference.

Reference Code:

 ///Get all Parameter Group Value in List
            List<PropertyInfo> propertiesInfo = typeof(GroupTypeId).GetProperties().ToList();

            Dictionary<ForgeTypeId, string> builtInParameterNames = new Dictionary<ForgeTypeId, string>();

            ///To Get all BuiltInParameter Group Names
            foreach (PropertyInfo property in propertiesInfo)
            {
                builtInParameterNames.Add(property.GetValue(property)as ForgeTypeId, property.Name);
            }

Hope this Helps 🙂

[eN27 · Accepted solution]

Reflection is not needed, since Revit 2022 there is a static method that returns all available GroupTypeId Members :

IList<ForgeTypeId> ParameterUtils.GetAllBuiltInGroups() 

There is a lot of static methods in the API that facilitate working with ForgeTypeId and the best way to discover them is through RDBE:

[Mohamed_Arshad]

HI @Extraneous  @eN27 @jeremy_tammik 

   @eN27 Thank you for the Suggestion, I make a summary of complete Query Thread. To extract the List of ForgeTypeId Class from GroupTypeId Class .

Suggestion-01 
@jeremy_tammik and me suggested to use System.Reflection Namespace | Microsoft Learn  from .NET. Kindly refer the below code snippet for additional reference.

Suggestion-01 Sample Code Snippet

///Get all Parameter Group Value in List
            List<PropertyInfo> propertiesInfo = typeof(GroupTypeId).GetProperties().ToList();

            Dictionary<ForgeTypeId, string> builtInParameterNames = new Dictionary<ForgeTypeId, string>();

            ///To Get all BuiltInParameter Group Names
            foreach (PropertyInfo property in propertiesInfo)
            {
                builtInParameterNames.Add(property.GetValue(property)as ForgeTypeId, property.Name);
            }

Suggestion-02

@eN27 suggested to use Revit API's In-Built GetAllBuiltInGroups Method. Kindly refer the below code snippet for additional reference.

Suggestion-02 Sample Code Snippet

///Get all Parameter Group Value in List
            var groupIds= ParameterUtils.GetAllBuiltInGroups();

            Dictionary<ForgeTypeId, string> builtInParameterNames = new Dictionary<ForgeTypeId, string>();

            ///To Get all BuiltInParameter Group Names
            foreach (ForgeTypeId groupId in groupIds)
            {
                builtInParameterNames.Add(groupId, LabelUtils.GetLabelForGroup(groupId));
            }

Hope this Helps 🙂

[Extraneous]

Thank you @eN27 , it's exactly what I need.

Unfortunately Static methods aren't so usable because you won't find it if you didn't know about it already. I think API is heading somewhere in the wrong direction with this "forge id" idea. It seem even Jeremy forgot about this ParameterUtils and recommended to use Reflection. Bruh...