Highlight query matches in EPiServer Find search results

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Highlighted excerpts and titles in search results are used to visualize query matches, i.e. highlight text that matches the search keywords. This posts shows how to include these highlights in a basic search result.

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Create a view model for the search page (optional)

We create a basic view model that we will pass on to our search page to enable easy access to the search page itself as well as the search result:

public class SearchPageViewModel
{
    public SearchPage CurrentPage { get; set; }
    public UnifiedSearchResults SearchResult { get; set; }
    public string Keywords { get; set; }

    public SearchPageViewModel(SearchPage page, UnifiedSearchResults results, string keywords)
    {
        CurrentPage = page;
        SearchResult = results;
        Keywords = keywords;
    }
}

Specify highlight settings

For each search result hit we want a title and an excerpt where matching words have been highlighted. In order to achieve this we will pass a HitSpecification object to the GetResult method:

public class SearchPageController : PageController<SearchPage>
{
    public ActionResult Index(SearchPage currentPage, string q)
    {
        UnifiedSearchResults searchResult = null;

        if (!string.IsNullOrWhiteSpace(q))
        {
            // Specify highlight settings
            var hitSpecification = new HitSpecification { HighlightExcerpt = true, HighlightTitle = true };

            // Search
            searchResult = SearchClient.Instance.UnifiedSearchFor(q).GetResult(hitSpecification);
        }

        // Return the search result view
        return View(new SearchPageViewModel(currentPage, searchResult, q));
    }
}

Render the search result

To display each search result item we’ll add the following to our search result view:

@if (Model.SearchResult != null)
{
    <div id="search-results">
        
        <p>Displaying the top @Model.SearchResult.Count() hits out of a total of @Model.SearchResult.TotalMatching matching your search for <em>@Model.Keywords</em>.</p>
    
        @foreach (UnifiedSearchHit result in Model.SearchResult)
        {
            <a href="@result.Url">
                <h2>@Html.Raw(result.Title)</h2>
                <p>@Html.Raw(result.Excerpt)</p>
            </a>
        }

    </div>   
}

Customize highlight styling

Each UnifiedSearchHit has an Excerpt and a Title property. These will contain HTML code where each highlight is an <em> element (this is why I use the Html.Raw() helper method to render them).

In order to customize the styling of each highlight we’ll add some CSS like this:

#search-results em
{ 
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 3px 3px 3px 3px;
    box-shadow: 0 1px #FFFFFF inset;
    font-style:normal;
}

This gives us a search result view like the following:

image