selecting element type parameter with none element type parameters

[wahedfazeli]

Is there any way to select element type parameters with none element type parameters i want to get keynote parameter with volume and area parameter of a element . I want to place if condition when my keynote parameter was specific number i put volume or area parameter of that element in specific database. Is there any way i can do this work?

[jeremytammik]

If you are searching for elements with a parameter taking an ElementId data type, you might be able to search for all that have the value ElementId.InvalidElementId assigned to them:

http://www.revitapidocs.com/2018/08ae8886-6ab3-3ef5-d2e0-0da2ffa7bd2c.htm

Best regards,

Jeremy

[wahedfazeli]

tnx dear jeremy

my problem dont solve 

when i write this code 

foreach(Element elem in new FilteredElementCollector( doc ).WhereElementIsNotElementType()) 

this code show parameters of area and volume but no keynote or uniformat parameter.

and when i write this code .

foreach(Element elem in new FilteredElementCollector( doc ).WhereElementIsElementType()) 

this code show parameters of keynote or uniformat but no area or volume parameter.

is there any way to select all of this parameters together?

[FAIR59 · Accepted solution]

Area is a instance parameter of an element, but KeyNote is a type parameter . So you need to find the type of the element to get the keynote.

To find the type of an element:

Element type_of_element = doc.GetElement( elem.GetTypeId());

the basic loop is something like this:

foreach(Element elem in new FilteredElementCollector( doc )
        .WhereElementIsNotElementType()
        .WhereElementIsViewIndependent()
      )
{
	Parameter p_area = elem.get_Parameter(BuiltInParameter.HOST_AREA_COMPUTED);
//				string area_value = p_area==null? string.Empty : p_area.AsDouble().ToString();
	string area_value = p_area==null? string.Empty : p_area.AsValueString();
	string keynote_value = string.Empty;
	Element type_of_element = doc.GetElement( elem.GetTypeId());
	if (type_of_element!=null)
	{
		Parameter p_keynote = type_of_element.get_Parameter(BuiltInParameter.KEYNOTE_PARAM);
		keynote_value = p_keynote==null? string.Empty : p_keynote.AsString();
		TaskDialog.Show("debug", string.Format("{0}  area: {1}, keynote: {2}",elem.Name,area_value,keynote_value));
		break;
	}
}

[wahedfazeli]

thanks a lot. my problem is solved