BuiltInParameterGroup deprecated in 2024 need help with replacement

[rodelWADLJ]

Hi,

Very new with Revit and .NET but have to build this application into the latest version.

Full code below:

public bool AddNewParameterToWallTypes(UIApplication app, string parameterName, BuiltInParameterGroup paramGroup = BuiltInParameterGroup.INVALID)
{
    var definitionFile = GetSharedParameterFile(app);

    if (definitionFile == null)
        return false;

    // Get the group to which the parameter belongs
    var group = definitionFile.Groups.get_Item("Testing");

    // If the group does not exist, create it
    if (group == null)
    {
        definitionFile.Groups.Create("Testing");
        group = definitionFile.Groups.get_Item("Testing");
    }

    // Get the parameter out of the group
    var parameterDefinition = group.Definitions.get_Item(parameterName);

    // If the parameter does not exist, create it
    if (parameterDefinition == null)
    {
        ExternalDefinitionCreationOptions options;

        if (parameterName == "InstallationGuideline" || parameterName == "DataSheet" || parameterName == "TypicalConstructionDetails" || parameterName == "Literature" || parameterName == "DistributedBy")
            options = new ExternalDefinitionCreationOptions(parameterName, SpecTypeId.String.Url);
        else
            options = new ExternalDefinitionCreationOptions(parameterName, SpecTypeId.String.Text);

        group.Definitions.Create(options);
        parameterDefinition = group.Definitions.get_Item(parameterName);
    }

    // Create a new Binding object with the categories to which the parameter will be bound
    var categories = app.Application.Create.NewCategorySet();

    // use category instead of the string name to get category 
    var wallsCategory = app.ActiveUIDocument.Document.Settings.Categories.get_Item(BuiltInCategory.OST_Walls);
    categories.Insert(wallsCategory);

    var caseTying = app.Application.Create.NewTypeBinding(categories);

    // Add the binding and definition to the document
    var result = app.ActiveUIDocument.Document.ParameterBindings.Insert(parameterDefinition, caseTying, paramGroup);

    return result;
}

`BuiltInParameterGroup` is not working since we're using 2024. Based on the docs

We've checked the docs https://www.revitapidocs.com/2024/9942b791-2892-0658-303e-abf99675c5a6.htm, we have to use the `GroupTypeId` class instead.

We've tried using the `GroupTypeId` but it has an error `GroupTypeId` static types cannot be used as parameters.

AddNewParameterToWallTypes(UIApplication app, string parameterName, GroupTypeId paramGroup = GroupTypeId.INVALID)

Another thing we have tried is using the `ForgeTypeId` which didn't give us an error but I don't think it is what we wanted. The reason why I tried `ForgeTypeId` is because on the code below, `paramGroup` is trying to convert it into `Autodesk.Revit.DB.ForgeTypeId`.

var result = app.ActiveUIDocument.Document.ParameterBindings.Insert(parameterDefinition, caseTying, paramGroup);

Any help and suggestion is appreciated!

Thanks!

[jeremy_tammik · Accepted solution]

Here is at least a solution for BuiltInParameterGroup.INVALID:

https://thebuildingcoder.typepad.com/blog/2023/11/journal-magic-adjacent-rooms-and-room-boundary.htm...

Maybe that will help solve the rest as well.