Categories.NewSubcategory Method

Add a new subcategory into the Autodesk Revit document.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0)

Syntax

C#

public Category NewSubcategory(
	Category parentCategory,
	string name
)

Parameters

parentCategory Category: The parent category.
name String: The new category name.

Return Value

Category
If successful, the newly created subcategory.

Exceptions

Exception	Condition
ArgumentNullException	Thrown when the input argument-"parentCategory" or "name"-is null.
ArgumentException	Thrown when the input argument-"parentCategory"-cannot add subcategory. Thrown when the input argument-"name"-is an illegal name.
InvalidOperationException	Thrown when subcategory creation failed.

Example

C#

public void AssignSubCategory(Document document, GenericForm extrusion)
{
    // create a new subcategory 
    Category cat = document.OwnerFamily.FamilyCategory;
    Category subCat = document.Settings.Categories.NewSubcategory(cat, "NewSubCat");

    // create a new material and assign it to the subcategory
    ElementId materialId = Material.Create(document, "Wood Material");
    subCat.Material = document.GetElement(materialId) as Material;

    // assign the subcategory to the element
    extrusion.Subcategory = subCat;
}

VB

Public Sub AssignSubCategory(document As Document, extrusion As GenericForm)
    ' create a new subcategory 
    Dim cat As Category = document.OwnerFamily.FamilyCategory
    Dim subCat As Category = document.Settings.Categories.NewSubcategory(cat, "NewSubCat")

    ' create a new material and assign it to the subcategory
    Dim materialId As ElementId = Material.Create(document, "Wood Material")
    subCat.Material = TryCast(document.GetElement(materialId), Material)

    ' assign the subcategory to the element
    extrusion.Subcategory = subCat
End Sub