Get Page URL Path

Question

Hello everyone i have use this code for get blog post detail

private async Task<PagedQueryResult<BlogPostSummary>> MapBlogPostsAsync(PagedQueryResult<CustomEntityRenderSummary> customEntityResult)
{
var blogPosts = new List<BlogPostSummary>(customEntityResult.Items.Count());
var imageAssetIds = customEntityResult
.Items
.Select(i => (BlogPostDataModel)i.Model)
.Select(m => m.ThumbnailImageAssetId)
.Distinct();
var images = await _imageAssetRepository.GetImageAssetRenderDetailsByIdRangeAsync(imageAssetIds);
foreach (var customEntity in customEntityResult.Items)
{
var model = (BlogPostDataModel)customEntity.Model;
var blogPost = new BlogPostSummary();
blogPost.Title = customEntity.Title;
blogPost.ShortDescription = model.ShortDescription;
blogPost.ThumbnailImageAsset = images.GetOrDefault(model.ThumbnailImageAssetId);
blogPost.FullPath = customEntity.PageUrls.FirstOrDefault(); --Here get full path of page . it's working fine

But I have use this code for categorypage full path here null value display.

private ICollection<CategorySummary> MapCategories(PagedQueryResult<CustomEntityRenderSummary> customEntityResult)
{
var categories = new List<CategorySummary>(customEntityResult.Items.Count());
foreach (var customEntity in customEntityResult.Items)
{
var model = (CategoryDataModel)customEntity.Model;
var category = new CategorySummary();
category.CategoryId = customEntity.CustomEntityId;
category.Title = customEntity.Title;
category.ShortDescription = model.ShortDescription;
category.UrlSlug = customEntity.UrlSlug;
category.FullPath = customEntity.PageUrls.FirstOrDefault();

Please check this .