以编程方式检索可以分配给Episerver中的页面的类别

Question

Does anyone have an idea of how to programmatically retrieve the categories that can be assigned to pages in Episerver ? C# is the programming language that I am using but an example in VB will do as well.

Answer 1

If you're after all the categories defined in the CMS, then start with fetching the root category first and all it's children.

Category rootCategory = Category.GetRoot();
CategoryCollection childCategories = rootCategory.Categories;
foreach (Category category in childCategories)
{
    // do whatever
}

If you only want to retrieve categories selected on the current page, then iterate through the Category property on the current page. It returns a CategoryList object which contains the Ids of the selected categories.

foreach (int catId in CurrentPage.Category)
{
    Category category = Category.Find(catId);
    // do whatever
}

Answer 2

Since Category.GetRoot() is marked as obsolete, this solution is more proper as per Episerver 9:

var categoryRepo = ServiceLocator.Current.GetInstance<CategoryRepository>();
var rootCategory = categoryRepo.GetRoot();
CategoryCollection childCategories = rootCategory.Categories;
foreach (Category category in childCategories)
{
// do whatever
}

Answer 3

You use the EPiServer.DataAbstraction.Category class. A good place to start would be the Category.GetRoot() method:

http://world.episerver.com/Documentation/Class-library/?documentId=cms/7/0ace72d5-11cd-b5cc-4dbe-af38a401f528

there are code examples on this page as well:

http://world.episerver.com/Documentation/Class-library/?documentId=cms/7/dbaa2f15-e227-1d1c-5142-2f245dd3e664