How to change wall material.

[Anonymous]

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.

[Anonymous]

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)

[so-chong · Accepted solution]

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();
	   }						
}

 

[Anonymous]

Thank you very much.