Revit二次开发之“Category的用途”

可以根据元素的Category属性判断元素的类型。

UIDocument uiDoc = cmdData.Application.ActiveUIDocument;

int ductNum = 0, wallNum = 0;
foreach (Element e in uiDoc.Selection.Elements)
{
    if ((BuiltInCategory)e.Category.Id.IntegerValue == BuiltInCategory.OST_Walls)
    {
        wallNum += 1;
    }
    else if ((BuiltInCategory)e.Category.Id.IntegerValue == BuiltInCategory.OST_DuctCurves)
    {
        ductNum += 1;
    }
}

WinForm.MessageBox.Show("墙数量：" + wallNum + "\n风管数量：" + ductNum);

from:http://revit.5d6d.com/thread-1187-1-1.html