Parameter Categorizer Coder

Let us see how to create a parameter categorizer method and add it to a class with the assistance of RevitAddinCoder. Click on the Parameter Categorizer tool button of the RevitAddinCoder,
 

or the menu item,
 

The Parameter Categorizer coder window will show up:
 

If some wanted categories are checked, the categorizer name is given, and a class is chosen, and the active project is a C# one, the following C# code will be created. 

/// <summary>
/// Sample Usage:
///
///object[] appParams2 = GetApplicableParametersToCategories(CachedDoc);
///using (StreamWriter sw = new StreamWriter(@"c:\test.csv"))
///{
///    List<BuiltInParameter> list1 = appParams1[0] as List<BuiltInParameter>;
///    List<string> list2 = appParams1[1] as List<string>;
///    foreach (BuiltInParameter p in list1)
///    {
///        sw.WriteLine(p.ToString());
///    }
///    sw.WriteLine();
///    foreach (string s in list2)
///    {
///        sw.WriteLine(s);
///    }
///}
///
/// </summary>
/// <param name="RvtDocument">Revit Document</param>
/// <returns>List array: the 1st points to BuiltInParameter; the 2nd custom parameter.</returns>
public static object[] GetApplicableParametersToCategories(RvtDocument doc)
{
    List<ElementId> catList = new List<ElementId>();
    catList.Add(doc.Settings.Categories.get_Item(BuiltInCategory.OST_Walls).Id);
    catList.Add(doc.Settings.Categories.get_Item(BuiltInCategory.OST_WallsDefault).Id);
    catList.Add(doc.Settings.Categories.get_Item(BuiltInCategory.OST_WallsFinish1).Id);
    catList.Add(doc.Settings.Categories.get_Item(BuiltInCategory.OST_WallsFinish2).Id);

    List<ElementId> paramList = ParameterFilterUtilities.GetFilterableParametersInCommon(doc, catList).ToList();

    List<BuiltInParameter> list1 = new List<BuiltInParameter>();
    List<string> list2 = new List<string>();
    foreach (ElementId id in paramList)
    {
        if (id.IntegerValue < 0)
        {
            list1.Add((BuiltInParameter)id.IntegerValue);
        }
        else
        {
            list2.Add(doc.get_Element(id).Name);
        }
    }

    return new object[] { list1, list2 };
}

If the active project is a VB.NET one, the following VB.NET code will be created.

    ''' <summary>
    ''' Sample Usage:
    '''
    '''Dim appParams1 As Object() = GetApplicableParametersToCategories(CachedDoc)
    '''Using sw As New StreamWriter("c:\temp\test.csv")
    '''    Dim list1 As List(Of BuiltInParameter) = TryCast(appParams1(0), List(Of BuiltInParameter))
    '''    Dim list2 As List(Of String) = TryCast(appParams1(1), List(Of String))
    '''    For Each p As BuiltInParameter In list1
    '''        sw.WriteLine(p.ToString())
    '''    Next
    '''    sw.WriteLine()
    '''    For Each s As String In list2
    '''        sw.WriteLine(s)
    '''    Next
    '''End Using
    '''
    ''' </summary>
    ''' <param name="doc">Revit Document</param>
    ''' <returns>List array: the 1st points to BuiltInParameter; the 2nd custom parameter.</returns>
    ''' <remarks></remarks>
    Public Shared Function GetApplicableParametersToCategories(ByVal doc As RvtDocument) As Object()
        Dim catList As New List(Of Autodesk.Revit.DB.ElementId)()
        catList.Add(doc.Settings.Categories.Item(BuiltInCategory.OST_Walls).Id)
        catList.Add(doc.Settings.Categories.Item(BuiltInCategory.OST_WallsDefault).Id)
        catList.Add(doc.Settings.Categories.Item(BuiltInCategory.OST_WallsFinish1).Id)
        catList.Add(doc.Settings.Categories.Item(BuiltInCategory.OST_WallsFinish2).Id)

        Dim paramList As List(Of Autodesk.Revit.DB.ElementId) = Autodesk.Revit.DB.ParameterFilterUtilities.GetFilterableParametersInCommon(doc, catList).ToList()

        Dim list1 As New List(Of BuiltInParameter)()
        Dim list2 As New List(Of String)()

        For Each id As Autodesk.Revit.DB.ElementId In paramList
            If id.IntegerValue < 0 Then
                list1.Add(DirectCast(id.IntegerValue, BuiltInParameter))
            Else
                list2.Add(doc.Element(id).Name)
            End If
        Next

        Return New Object() {list1, list2}
    End Function

Parameter Categorizer of RevitAddinCoder can create all the code automatically in no time.