Asp.net Core 2.1使用MongoDB

一、添加依赖

1、MongoDB.Driver

2、MongoDB.Bson

二、配置服务到StartUp.cs

public void ConfigureServices(IServiceCollection services)
{
 //添加mongodb依赖
 string mongoConnectionString = Configuration.GetSection("Mongo:ConnectionString").Value;
 services.AddSingleton(new MongoClient(mongoConnectionString));
}

三、添加配置到appsettings.json

{
  "Mongo": {
    "ConnectionString": "mongodb://账号:密码@服务器IP:27017/默认数据库名称"
  }
}

四、自己编写的一个帮助类；这里只公布一部分。 其余的可以自行拓展

public class MongoBase<T>: IMongoBase<T> //接口可自己根据此类抽象出来
    {

        private IMongoCollection<T> mongoClient;
        /// <summary>
        /// 
        /// </summary>
        /// <param name="client"></param>
        /// <param name="name">MongoDB的表名</param>
        public MongoBase(MongoClient client, string name)
        {
            var database = client.GetDatabase("数据库名称");
            mongoClient = database.GetCollection<T>(name);
        }

        #region 新增单个 + void InsertOne(T entity)
        /// <summary>
        /// 新增单个
        /// </summary>
        /// <param name="entity"></param>
        public void InsertOne(T entity)
        {
            mongoClient.InsertOne(entity);
        }
        #endregion

        #region 批量新增 + void InsertMany(IEnumerable<T> entity)
        /// <summary>
        /// 批量新增
        /// </summary>
        /// <param name="entity"></param>
        public void InsertMany(IEnumerable<T> entity)
        {
            mongoClient.InsertMany(entity);
        }
        #endregion

        #region 查找第一个 + T FindFirst(FilterDefinition<T> filter,FindOptions option =  null)
        /// <summary>
        /// 查找第一个
        /// </summary>
        /// <param name="filter"></param>
        /// <param name="option"></param>
        /// <returns></returns>
        public T FindFirst(FilterDefinition<T> filter, FindOptions option = null)
        {
            return mongoClient.Find(filter, option).FirstOrDefault();
        }
        #endregion

        #region 查找多个 + List<T> FindList(FilterDefinition<T> filter, FindOptions option = null)
        /// <summary>
        /// 查找多个
        /// </summary>
        /// <param name="filter"></param>
        /// <param name="option"></param>
        /// <returns></returns>
        public List<T> FindList(FilterDefinition<T> filter, FindOptions option = null)
        {
            return mongoClient.Find(filter, option).ToList();
        }
        #endregion

    }

五、编写一个MongoDB集合；

这里使用一个叫UserInfo的MongoDB数据库集合做测试

    public class UserInfoService : MongoBase<UserInfo>
    {
        public UserInfoService(MongoClient client) : base(client, "UserInfo")
        { }

    }

六、在Controller中使用

    public class MongoController : Controller
    {
        private UserInfoService userInfo;
        //使用DI注入；
        public MongoController(UserInfoService _userInfo)
        {
            this.userInfo = _userInfo;
        }
        public IActionResult Index()
        {
            UserInfo user = userInfo.FindFirst(Builders<UserInfo>.Filter.Eq(p => p.Name, "Test"));
            userInfo.InsertOne(new UserInfo() { Name="Test", UserID=222 });

            user = userInfo.FindFirst(Builders<UserInfo>.Filter.Eq(p => p.Name, "Test"));
            return View();
        }
    }