Atlas Full-Text Search with .NET Blazor Snippets

Home.razor Code

@code {

//...

string searchTerm;
Timer debounceTimer;
int debounceInterval = 200;

//...

private void SearchMovies()
    {
        if (string.IsNullOrWhiteSpace(searchTerm))
        {
            movies = MongoDBService.GetAllMovies();
        }
        else
        {
            movies = MongoDBService.MovieSearchByText(searchTerm);
        }
   }


void DebounceSearch(object state)
    {
        if (string.IsNullOrWhiteSpace(searchTerm))
        {
            SearchMovies();
        }
        else
        {
            InvokeAsync(() =>
            {
                SearchMovies();
                StateHasChanged();
            });
        }
    }

void OnSearchInput(ChangeEventArgs e)
    {
            searchTerm = e.Value.ToString();
            debounceTimer?.Dispose();
            debounceTimer = new Timer(DebounceSearch, null, debounceInterval, Timeout.Infinite);
    }
}

Home.razor HTML

//...

<div class="form-inline search-bar">
    <input class="form-control mr-sm-2"
      type="search" placeholder="Search" 
      aria-label="Search" 
      @oninput="OnSearchInput" @bind="searchTerm">
</div>

//...

IMongoDBService.cs

public IEnumerable<Movie> MovieSearchByText (string textToSearch);

MongoDBService.cs

using SeeSharpMovies.Models;
using MongoDB.Driver;
using MongoDB.Driver.Search;

//...

public IEnumerable<Movie> MovieSearchByText(string textToSearch)
{             
// define fuzzy options
  SearchFuzzyOptions fuzzyOptions = new SearchFuzzyOptions()
  {
    MaxEdits = 1,
    PrefixLength = 1,   
    MaxExpansions = 256
  };
  
  // define and run pipeline
  var movies = _movies.Aggregate().Search(Builders<Movie>.Search.Autocomplete(movie => movie.Title, 
  textToSearch, fuzzy: fuzzyOptions), indexName: "title").Project<Movie>(Builders<Movie>.Projection
  .Exclude(movie => movie.Id)).ToList();
  return movies;
}