Code to filter the number of element from selection

[alexhung91687250]

I'm beginner of revit API. I am going to create a code to determine the number of element from the selection in active view. The below is the code for the wall but I don't know how to determine the number of beam or column. It's relate to classes or family instance.

I hope everyone can show me the way to make it. Thanks all!!

public void alex01()
{
UIDocument uidoc= ActiveUIDocument;
Autodesk.Revit.UI.Selection.SelElementSet collection= uidoc.Selection.Elements;
TaskDialog.Show("Revit","Number of selected elements : " + collection.Size.ToString());
SelElementSet abcd = SelElementSet.Create();
SelElementSet none = SelElementSet.Create();
foreach(Autodesk.Revit.DB.Element elements in collection)
{
if(elements is Wall)
{
abcd.Add(elements);
}
  }
 uidoc.Selection.Elements = abcd;
if(0!=abcd.Size)
{
TaskDialog.Show("revit",uidoc.Selection.Elements.Size.ToString()+" walls are selected");

}
else
{
TaskDialog.Show("revit","no walls have been selected!!");
}
uidoc.Selection.Elements= none;
}

[Wanderer]

I'm beginner of revit API. I am going to create a code to determine the number of element from the selection in active view. The below is the code for the wall but I don't know how to determine the number of beam or column. It's relate to classes or family instance.

I hope everyone can show me the way to make it. Thanks all!!

public void alex01()
{
UIDocument uidoc= ActiveUIDocument;
Autodesk.Revit.UI.Selection.SelElementSet collection= uidoc.Selection.Elements;
TaskDialog.Show("Revit","Number of selected elements : " + collection.Size.ToString());
SelElementSet abcd = SelElementSet.Create();
SelElementSet none = SelElementSet.Create();
foreach(Autodesk.Revit.DB.Element elements in collection)
{
if(elements is Wall)
{
abcd.Add(elements);
}
  }
 uidoc.Selection.Elements = abcd;
if(0!=abcd.Size)
{
TaskDialog.Show("revit",uidoc.Selection.Elements.Size.ToString()+" walls are selected");

}
else
{
TaskDialog.Show("revit","no walls have been selected!!");
}
uidoc.Selection.Elements= none;
}

Hi there, I'm going to move this from the Dot Net API forum in the programming area, over to the Revit - API forum in the Revit area, as I think it might be better served there. Cheers!

[Elizabeth Shulok]

Beams and columns are represented in the Revit API by the FamilyInstance class. You can use the StructuralType property of the FamilyInstance class to determine whether the FamilyInstance is a beam, column, or something else. Below is one way you could modify your method to find the number of selected beams, columns and braces.

public void alex01()
        {
            UIDocument uidoc = ActiveUIDocument;
            Autodesk.Revit.UI.Selection.SelElementSet collection = uidoc.Selection.Elements;
            TaskDialog.Show("Revit", "Number of selected elements : " + collection.Size.ToString());
            SelElementSet abcd = SelElementSet.Create();
            SelElementSet none = SelElementSet.Create();
            int numBeams = 0, numCols = 0, numBraces = 0;
            foreach (Autodesk.Revit.DB.Element elements in collection)
            {
                if (elements is Wall)
                {
                    abcd.Add(elements);
                }

                if (elements is FamilyInstance)
                {
                    FamilyInstance instance = elements as FamilyInstance;
                    switch (instance.StructuralType)
                    {
                        case Autodesk.Revit.DB.Structure.StructuralType.Beam:
                            numBeams++;
                            break;
                        case Autodesk.Revit.DB.Structure.StructuralType.Brace:
                            numBraces++;
                            break;
                        case Autodesk.Revit.DB.Structure.StructuralType.Column:
                            numCols++;
                            break;
                        case Autodesk.Revit.DB.Structure.StructuralType.Footing:
                            break;
                        case Autodesk.Revit.DB.Structure.StructuralType.NonStructural:
                            break;
                        case Autodesk.Revit.DB.Structure.StructuralType.UnknownFraming:
                            break;
                        default:
                            break;
                    }
                }
            }

            TaskDialog.Show("Revit", String.Format("{0} beams selected, {1} columns selected, and {2} braces selected.", numBeams, numCols, numBraces));
            uidoc.Selection.Elements = abcd;
            if (0 != abcd.Size)
            {
                TaskDialog.Show("revit", uidoc.Selection.Elements.Size.ToString() + " walls are selected");

            }
            else
            {
                TaskDialog.Show("revit", "no walls have been selected!!");
            }
            uidoc.Selection.Elements = none;
        }

By the way, the Selection.Elements property has been deprecated in Revit 2015 and you should use Selection.GetElementIds() to get the ids of the selected elements and Selection.SetElementIds() to change the selected elements.