Blog Categories only in dropdown list

Posted by Community Admin on 03-Nov-2011 00:00

I've bee able to build a custom dropdown list control based on this thread:
http://www.sitefinity.com/devnet/forums/sitefinity-4-x/general-discussions/categorytree.aspx

However, I want to take it one step further and ONLY show the categories that are used in blog posts.

How could I expand upon the post above to accomplish this?

Thank you.

Posted by Community Admin on 04-Nov-2011 00:00

Hi Amir,

Can you attach the control that you have build so we can have a look at it and see whats the proper way to implement the required code?

Kind regards,
Victor Velev
the Telerik team

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Posted by Community Admin on 09-Nov-2011 00:00

Thanks Victor,

Here is the current code:

protected void Page_Load(object sender, EventArgs e)

var tm = TaxonomyManager.GetManager();

var tax = tm.GetTaxonomy(TaxonomyManager.CategoriesTaxonomyId);

var taxa = tax.Taxa;

categorylist.Items.Add(new ListItem("Categories", "0"));

foreach (HierarchicalTaxon taxon in taxa)

string url = "";

var evaluator = new TaxonomyEvaluator();

var taxonBuildOptions = TaxonBuildOptions.None;

if (tax is HierarchicalTaxonomy)

taxonBuildOptions = TaxonBuildOptions.Hierarchical;

else if (tax is FlatTaxonomy)

taxonBuildOptions = TaxonBuildOptions.Flat;

string evaluatedResult = "/blog" + evaluator.BuildUrl(tax.Name +"/", taxon.UrlName, "Category", taxonBuildOptions, UrlEvaluationMode.UrlPath, null);

var li = new ListItem(taxon.Title, evaluatedResult);

categorylist.Items.Add(li);

Where "categoryList" is a simple DropDownList.

So, this gets ALL of the categories in the system and binds them to a dropdownlist, but as i mentioned, I'd like to ONLY show the categories that were assigned to blog posts. Thank you.

Posted by Community Admin on 11-Nov-2011 00:00

Hello Amir,

Thank you for providing the code. We will need some more time to explore the code and provide you with a solution.

Best wishes,
Victor Velev
the Telerik team

Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items

Posted by Community Admin on 15-Nov-2011 00:00

Hi Amir,

We have prepared a sample code for you. Feel free to modify it so it suits your needs:

var catList = new List<ITaxon>();

var blogPosts = App.WorkWith().BlogPosts().Get().ToList();

if (blogPosts != null)

var manager = TaxonomyManager.GetManager();

foreach (var blog in blogPosts)

var blogsCats = blog.GetValue<TrackedList<Guid>>("Category");

if (blogsCats != null)

foreach (var cat in blogsCats)

var category = manager.GetTaxon(cat);

if (category != null && !catList.Contains(category))

catList.Add(category);

foreach (var c in catList)

string url = "";

var evaluator = new TaxonomyEvaluator();

var taxonBuildOptions = TaxonBuildOptions.None;

if (c is HierarchicalTaxonomy)

taxonBuildOptions = TaxonBuildOptions.Hierarchical;

else if (c is FlatTaxonomy)

taxonBuildOptions = TaxonBuildOptions.Flat;

string evaluatedResult = "/blog" + evaluator.BuildUrl(c.Name + "/", c.UrlName, "Category", taxonBuildOptions, UrlEvaluationMode.UrlPath, null);

categorylist.Items.Add(c.Title);

Best wishes,
Victor Velev
the Telerik team

Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items

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