MongoDB_FindOneAndUpdateOptions

using MongoDB.Bson;
using MongoDB.Bson.IO;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Attributes;
using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace M101DotNet
{
    class Program
    {
        static void Main(string[] args)
        {
            MainAsync(args).GetAwaiter().GetResult();
            Console.WriteLine("Press enter");
            Console.ReadLine();

        }

        static async Task MainAsync(string[] args)
        {
            var client = new MongoClient();
            var db = client.GetDatabase("Phucdb");
            var col = db.GetCollection<Widget>("widgets");
            // Drop r Insert
            await db.DropCollectionAsync("widgets");
            var docs = Enumerable.Range(0, 10).Select(i => new Widget { Id = i, X = i });
            await col.InsertManyAsync(docs);
            //FindOneAndUpdate
            var result = await col.FindOneAndUpdateAsync<Widget>(
                x => x.X > 5,
                Builders<Widget>.Update.Inc(x => x.X, 555),
                new FindOneAndUpdateOptions<Widget, Widget>
                {
                    ReturnDocument = ReturnDocument.After, // Hiện gtri trc' or sau chỉnh sữa
                    Sort =  Builders<Widget>.Sort.Descending(x=>x.X) // Sort gtri chỉnh sữa theo ý muốn
                }
            );
            // Xuat dòng vừa dc thực thi
            Console.WriteLine(result);
            Console.WriteLine();
            // Xuat
            await col.Find(new BsonDocument()).ForEachAsync(x => Console.WriteLine(x));
        }
        private class Widget
        {
            public int Id { get; set; }
            [BsonElement("x")]
            public int X { get; set; }

            public override string ToString()
            {
                return string.Format("Id: {0}, X: \"{1}\"", Id, X);
            }
        }
    }
}