c#操作mongodb

最近有点忙，换工作了，也加入到996的阵营中，一个字，累啊，哈哈，为自己加油。

1.环境：
windows10
vs2015
2.下载驱动程序
https://github.com/mongodb/mongo-csharp-driver/downloads
当然我们会使用NuGet

3.帮助类

DB.cs

    public class DB
    {
        private static readonly string connStr = "mongodb://127.0.0.1:27017";

        private static readonly string dbName = "mytestdb";

        private static IMongoDatabase db = null;

        private static readonly object lockHelper = new object();

        private DB() { }

        public static IMongoDatabase GetDb()
        {
            if (db == null)
            {
                lock (lockHelper)
                {
                    if (db == null)
                    {
                        var client = new MongoClient(connStr);
                        db = client.GetDatabase(dbName);
                    }
                }
            }
            return db;
        }
    }

MongoDbHelper类

    public class MongoDbHelper<T> where T : BaseEntity
    {
        private IMongoDatabase db = null;

        private IMongoCollection<T> collection = null;

        public MongoDbHelper()
        {
            this.db = DB.GetDb();
            collection = db.GetCollection<T>(typeof(T).Name);
        }
        /// <summary>
        /// 新增
        /// </summary>
        /// <param name="entity"></param>
        /// <returns></returns>
        public T Insert(T entity)
        {
            var flag = ObjectId.GenerateNewId();
            entity.GetType().GetProperty("Id").SetValue(entity, flag);
            entity.State = "y";
            entity.CreateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
            entity.UpdateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

            collection.InsertOneAsync(entity);
            return entity;
        }
        /// <summary>
        /// 修改
        /// </summary>
        /// <param name="id"></param>
        /// <param name="field"></param>
        /// <param name="value"></param>
        public void Modify(string id, string field, string value)
        {
            var filter = Builders<T>.Filter.Eq("Id", ObjectId.Parse(id));
            var updated = Builders<T>.Update.Set(field, value);
            UpdateResult result = collection.UpdateOneAsync(filter, updated).Result;
        }
        /// <summary>
        /// 更新
        /// </summary>
        /// <param name="entity"></param>
        public void Update(T entity)
        {
            try
            {
                var old = collection.Find(e => e.Id.Equals(entity.Id)).ToList().FirstOrDefault();

                foreach (var prop in entity.GetType().GetProperties())
                {
                    var newValue = prop.GetValue(entity);
                    var oldValue = old.GetType().GetProperty(prop.Name).GetValue(old);
                    if (newValue != null)
                    {
                        if (oldValue == null)
                            oldValue = "";
                        if (!newValue.ToString().Equals(oldValue.ToString()))
                        {
                            old.GetType().GetProperty(prop.Name).SetValue(old, newValue.ToString());
                        }
                    }
                }
                old.State = "n";
                old.UpdateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

                var filter = Builders<T>.Filter.Eq("Id", entity.Id);
                ReplaceOneResult result = collection.ReplaceOneAsync(filter, old).Result;
            }
            catch (Exception ex)
            {
                var aaa = ex.Message + ex.StackTrace;
                throw;
            }
        }
        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="entity"></param>
        public void Delete(T entity)
        {
            var filter = Builders<T>.Filter.Eq("Id", entity.Id);
            collection.DeleteOneAsync(filter);
        }
        /// <summary>
        /// 根据id查询一条数据
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public T QueryOne(string id)
        {
            return collection.Find(a => a.Id == ObjectId.Parse(id)).ToList().FirstOrDefault();
        }
        /// <summary>
        /// 查询所有数据
        /// </summary>
        /// <returns></returns>
        public List<T> QueryAll()
        {
            return collection.Find(a => a.State != "").ToList();
        }
        /// <summary>
        /// 根据条件查询一条数据
        /// </summary>
        /// <param name="express"></param>
        /// <returns></returns>
        public T QueryByFirst(Expression<Func<T, bool>> express)
        {
            return collection.Find(express).ToList().FirstOrDefault();
        }
        /// <summary>
        /// 批量添加
        /// </summary>
        /// <param name="list"></param>
        public void InsertBatch(List<T> list)
        {
            collection.InsertManyAsync(list);
        }
        /// <summary>
        /// 根据Id批量删除
        /// </summary>
        public void DeleteBatch(List<ObjectId> list)
        {
            var filter = Builders<T>.Filter.In("Id", list);
            collection.DeleteManyAsync(filter);
        }

        /// <summary>
        /// 未添加到索引的数据
        /// </summary>
        /// <returns></returns>
        public List<T> QueryToLucene()
        {
            return collection.Find(a => a.State.Equals("y") || a.State.Equals("n")).ToList();
        }
    }

BaseEntity类

  public abstract class BaseEntity
    {
        public ObjectId Id { get; set; }

        public string State { get; set; }

        public string CreateTime { get; set; }

        public string UpdateTime { get; set; }
    }

mongoCustomer类

 public class mongoCustomer : BaseEntity
    {
        /// <summary>
        /// 名称
        /// </summary>
        public string Name { get; set; }
        /// <summary>
        /// 传真
        /// </summary>
        public string TaxCode { get; set; }
        /// <summary>
        /// 电话号
        /// </summary>
        public string Phone { get; set; }
    }

4.测试

 class Program
    {
        static void Main(string[] args)
        {
            mongodbtest.MongoDbHelper<mongoCustomer> helper = new MongoDbHelper<mongoCustomer>();
            mongoCustomer m = new mongodbtest.mongoCustomer();
            m.Phone = "15010379999";
            m.CreateTime = DateTime.Now.ToString();
            m.UpdateTime = DateTime.Now.ToString();
            m.Name = "小王";
            m.State = "State";
            m.TaxCode = "007";
            helper.Insert(m);
            var list= helper.QueryAll();
            foreach (var item in list)
            {
                Console.WriteLine(item.Name);
            }
            Console.ReadLine();
        }
    }

代码下载