topic Re: How to change wall material. in Revit API Forum

How to change wall material.

Anonymous — Sun, 22 Nov 2020 04:59:48 GMT

I want to change all wall material is "Precast Wall Status 1 (DS)".

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FilteredElementCollector assCollector = new FilteredElementCollector(doc).OfClass(typeof(AssemblyInstance));
foreach(Element el in assCollector){
ElementFilter EF = new ElementClassFilter(typeof(FamilyInstance));
IList<ElementId> dependentElementIDS = el.GetDependentElements(EF) as IList<ElementId>;
foreach(ElementId dependentElementID in dependentElementIDS){
Element elem = doc.GetElement(dependentElementID);
if (elem.Name == "type-aw"){
ElementType elemType = doc.GetElement(elem.GetTypeId()) as ElementType;
elemType.LookupParameter("Structural Material").SetValueString("Precast Wall Status 1 (DS)");
} // if
} //foreach
}/foreach

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Thank you.

Re: How to change wall material.

Anonymous — Sun, 22 Nov 2020 09:17:22 GMT

I have writen a program about changing wall material in python, and the code may be helpful for you.

The funciton used can be found in Revit API docs.

def change_wall_material(self,wall, m_Id):# m_Id means the Id of Target material
    if wall.GetType().ToString() == 'Autodesk.Revit.DB.Wall':
        wall = wall.WallType
    marks = wall.GetCompoundStructure()
    if marks:
        marks.SetMaterialId(0, ElementId(m_Id))#Change the material of first layer of wall
        wall.SetCompoundStructure(marks)
        I = wall.GetCompoundStructure()
        print(I.GetLayers()[0].MaterialId)

Re: How to change wall material.

so-chong — Fri, 27 Nov 2020 10:26:03 GMT

Hi,

As these walls are "Model-In-Place" elements (not created by Wall system families) you could write something like this (macro c#)

public void ChangeWallStructuralMaterial() { Document doc = this.ActiveUIDocument.Document; using (Transaction t = new Transaction(doc, "Change Wall Structural Material")) { t.Start(); List<FamilyInstance> walls = new FilteredElementCollector(doc) .OfClass(typeof(FamilyInstance)) .OfCategory(BuiltInCategory.OST_Walls) .Cast<FamilyInstance>() .ToList(); Material mat = new FilteredElementCollector(doc) .OfClass(typeof(Material)) .Cast<Material>() .FirstOrDefault(q => q.Name == "Precast Wall Status 1 (DS)") as Material; foreach (Element wall in walls) { ElementId elemTypeId = wall.GetTypeId(); ElementType elemType = (ElementType)doc.GetElement(elemTypeId); elemType.LookupParameter("Structural Material").Set(mat.Id); } t.Commit(); } }

Re: How to change wall material.

Anonymous — Sat, 28 Nov 2020 01:29:04 GMT

Thank you very much.