Create Project Parameter from Shared Parameter

Michael_Kirschner2 · December 17, 2018, 3:54pm

Hi @erfajo - I looked briefly at the implementation:

DynamoDS/DynamoRevit/blob/94be25ae025e4372841db50cf3c4edb255652a78/src/Libraries/RevitNodes/Elements/Parameter.cs#L296




/// <summary>
/// Create a new Project Parameter in this current Revit document
/// </summary>
/// <param name="parameterName">Name</param>
/// <param name="groupName">Group of the parameter for shared parameters</param>
/// <param name="type">Parameter Type</param>
/// <param name="group">Parameter Group</param>
/// <param name="instance">Is instance parameter, otherwise it's a type parameter</param>
/// <param name="categoryList">List of categories this parameter applies to. If no category is supplied, all possible categories are selected</param>
public static void CreateProjectParameter(string parameterName, string groupName, string type, string group, bool instance, System.Collections.Generic.IEnumerable<Category> categoryList)
{
    // parse parameter type
    var parameterType = Autodesk.Revit.DB.ParameterType.Text;
    if (!System.Enum.TryParse<Autodesk.Revit.DB.ParameterType>(type, out parameterType))
        throw new System.Exception(Properties.Resources.ParameterTypeNotFound);


    // parse parameter group
    var parameterGroup = Autodesk.Revit.DB.BuiltInParameterGroup.PG_DATA;
    if (!System.Enum.TryParse<Autodesk.Revit.DB.BuiltInParameterGroup>(group, out parameterGroup))
        throw new System.Exception(Properties.Resources.ParameterTypeNotFound);

I think that the node naming of the node is not aligned with the revit API/UI and instead was intended to be simpler to understand for new users - but I agree it seems to only add confusion since internally this node creates shared parameters using a shared parameter file.

I think in this case the group is used just as a way of avoiding collisions between parameters in the shared parameter file with the same name.

I defer to the community or Revit teams usually on Revit API functionality though. If you think we should get rid of this input, we can obsolete this node and change it in 3.0.

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Create Project Parameter from Shared Parameter

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