MongoDB_UpdateWithClass

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);
            //Update
            var result = await col.UpdateOneAsync(
                x => x.Id == 5,
                // Tăng x lên 55
                //Builders<BsonDocument>.Update.Inc("x", 55)
                // Set x = 70
                Builders<Widget>.Update.Set("x",70)
                );
            // 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);
            }
        }
    }
}