Load Combination Get Usage Ids Method

void ModifyLoadCombinationLoadCaseLoadUsageLoadNatureAndLoadComponent(Document document, LoadCombination loadCombination)
{
    // Change name of LoadCombination
    loadCombination.Name = "DL2 + RAIN1";

    // Get any LoadCase from combination
    // Combination can have assigned LoadCase or other (nested) LoadCombination so we need to filter out any LoadCombination
    LoadCase case1 = null;
    IList<ElementId> caseAndCombinationIds = loadCombination.GetCaseAndCombinationIds();
    foreach (ElementId id in caseAndCombinationIds)
    {
        Element element = document.GetElement(id);
        if (element is LoadCase)
        {
           case1 = (LoadCase)element;
           break;
        }
        else if (element is LoadCombination)
        {
           continue;
        }
    }

    if (case1 == null)
       throw new Exception("Can't get LoadCase.");

    // Change case name and number
    case1.Name = "DL2";
    if (LoadCase.IsNumberUnique(document, 3))
    {
        case1.Number = 3;
    }

    // Create load nature
    LoadNature liveNature = LoadNature.Create(document, "Dead nature");
    if (liveNature == null)
       throw new Exception("Create new load nature failed.");

    // Change nature category, ID and number for case
    case1.SubcategoryId = new ElementId(BuiltInCategory.OST_LoadCasesDead);
    case1.NatureId = liveNature.Id;

    //Change factor for case1
    IList<LoadComponent> components = loadCombination.GetComponents();
    foreach (LoadComponent loadComponent in components)
    {
        if (loadComponent.LoadCaseOrCombinationId == case1.Id)
        {
            loadComponent.Factor = 3.0;
        }
    }

    loadCombination.SetComponents(components);

    // Remove one usage from combination
    IList<ElementId> usages = loadCombination.GetUsageIds();
    usages.RemoveAt(0);
    loadCombination.SetUsageIds(usages);

    // Give the user some information
    TaskDialog.Show("Revit", string.Format("Load Combination ID='{0}' modified successfully.", loadCombination.Id.ToString()));
}

Private Sub ModifyLoadCombinationLoadCaseLoadUsageLoadNatureAndLoadComponent(document As Document, loadCombination As LoadCombination)
    ' Change name of LoadCombination
    loadCombination.Name = "DL2 + RAIN1"

    ' Get any LoadCase from combination
    ' Combination can have assigned LoadCase or other (nested) LoadCombination so we need to filter out any LoadCombination
    Dim case1 As LoadCase = Nothing
    Dim caseAndCombinationIds As IList(Of ElementId) = loadCombination.GetCaseAndCombinationIds()
    For Each id As ElementId In caseAndCombinationIds
        Dim element As Element = document.GetElement(id)
        If TypeOf element Is LoadCase Then
            case1 = DirectCast(element, LoadCase)
            Exit For
        ElseIf TypeOf element Is LoadCombination Then
            Continue For
        End If
    Next

    If case1 Is Nothing Then
        Throw New Exception("Can't get LoadCase.")
    End If

    ' Change case name and number
    case1.Name = "DL2"
    If LoadCase.IsNumberUnique(document, 3) Then
        case1.Number = 3
    End If

    ' Create load nature
    Dim liveNature As LoadNature = LoadNature.Create(document, "Dead nature")
    If liveNature Is Nothing Then
        Throw New Exception("Create new load nature failed.")
    End If

    ' Change nature category, ID and number for case
    case1.SubcategoryId = New ElementId(BuiltInCategory.OST_LoadCasesDead)
    case1.NatureId = liveNature.Id

    'Change factor for case1
    Dim components As IList(Of LoadComponent) = loadCombination.GetComponents()
    For Each loadComponent As LoadComponent In components
        If loadComponent.LoadCaseOrCombinationId = case1.Id Then
            loadComponent.Factor = 3.0
        End If
    Next

    loadCombination.SetComponents(components)

    ' Remove one usage from combination
    Dim usages As IList(Of ElementId) = loadCombination.GetUsageIds()
    usages.RemoveAt(0)
    loadCombination.SetUsageIds(usages)

    ' Give the user some information
    TaskDialog.Show("Revit", String.Format("Load Combination ID='{0}' modified successfully.", loadCombination.Id.ToString()))
End Sub

No code example is currently available or this language may not be supported.

No code example is currently available or this language may not be supported.