Problem with get_Parameter

[Anonymous]

Hi everyone:

I've been trying to modifiy a parameter of an element. In my code I call the method  "ModificarParametroElemento" with a specific parameter name, but the problem is when i calling the class "get_Parameter()" because the class only accepts (GUID's, BuiltInParameter, Definitions) and I dont know how i get the element parameter with my string text.

Thanks!

//IN THIS PART I'VE BEEN CALLING THE METHOD "ModificarParametrosElemento" TO PROCEED 


this.ModificaParametrosElemento(elementId2.IntegerValue, num3.ToString(), this.document, "Union 16");

//METHOD

private bool ModificaParametrosElemento(int ID, string ValorParam, Document Documento, string StrParametro)
        {
            bool result;
            try
            {
                ElementId elementId = new ElementId(ID);
                Element element = this.document.GetElement(elementId);


                if (element != null)
                {
                    ParameterSet arg_20_0 = element.Parameters;
                    Parameter parameter = element.get_Parameter(StrParametro);
                    
                    if (parameter != null)
                    {
                        switch (parameter.StorageType)
                        {
                            case (StorageType)(1):
                                element.get_Parameter(StrParametro).Set(Convert.ToInt32(ValorParam));
                                break;
                            case (StorageType)(2):
                                element.get_Parameter(StrParametro).Set(double.Parse(ValorParam));
                                break;
                            case (StorageType)(3):
                                element.get_Parameter(StrParametro).Set(ValorParam);
                                break;
                            case (StorageType)(4):
                                element.get_Parameter(StrParametro).Set(new ElementId(int.Parse(ValorParam)));
                                break;
                        }
                    }
                }
                result = true;
            }
            catch (Exception ex)
            {
                TaskDialog.Show("ModificaParametrosElemento", ex.Message, (TaskDialogCommonButtons)(1));
                result = false;
            }
            return result;
        }

[rosalesduquej]

Dear Carlos,

What version of Revit are you using ? 2015 ? or some earlier one. One thing I can think of if you are using 2015 or newer is to use LookupParameter instead of get_Parameter, for a couple of reasons.

- get_Parameter is an obsolete method and has been depracated in Revit 2015 (see attached for explanation)

- LookupParameter will return you the first available parameter with a given name, 

I think this is what you are trying to do, If not please explain and It will help me better if you can submit a small ready-to-build command to investigate and also a more in detail explanation of what you are trying to do. 

Thanks

[Mendo123]

I have some code that would allow you get the GUID of a shared parameter if you are completely stuck,

        static Guid SharedParamGuid(Application app, string defGroup, string defName, DefinitionFile file)
        {
            Guid guid = Guid.Empty;
            try
            {
                file = app.OpenSharedParameterFile();
                DefinitionGroup group = file.Groups.get_Item(defGroup);
                Definition definition = group.Definitions.get_Item(defName);
                ExternalDefinition externalDefinition = definition as ExternalDefinition;
                guid = externalDefinition.GUID;
            }
            catch (Exception)
            {
            }
            return guid;
        }

reply was meant for the poster sorry rosalesduquej 

[sfadeev]

Hi there! If get_Parameter is obsolete, what is the correct and efficient way to get the BuiltInParameter? I cannot find the method allowing BuiltInParameter type as the argument... Iterating all parameters is not efficient. But LookupParameter need string name of the parameter and cause localization issues.

[Yien_Chao]

Indeed get_parameter is for builtinparameter.

You want to use .LookupParameter("yourparameter") .String() instead, because is a user parameter.

[Yien_Chao]

Oups i meant .AsString()