c#操作mongodb数据库工具类

新建c#项目，在nuget中引入MongoDB.Driver驱动，然后新建一个MongoDBToolHelper类，将下面代码复制进去

using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Driver;
using MongoDB.Driver.Builders;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Hy.DBUtility.Common
{
    /// <summary>
    /// mongodb数据库帮助类
    /// </summary>
    public class MongoDBToolHelper
    {
        /// <summary>
        /// 数据库名称
        /// </summary>
        public string ConnectionNamse { get; set; }

        /// <summary>
        /// 数据库连接字符串
        /// </summary>
        public string PBConStr { get; set; } = "";

        public string connStr
        {
            get
            {
                try
                {
                    string database = "";
                    var db = ConfigurationManager.ConnectionStrings[this.ConnectionNamse];
                    if (db != null)
                    {
                        database = db.ConnectionString;
                    }
                    else
                    {
                        database = ConfigurationManager.AppSettings[this.ConnectionNamse];
                    }
                    if (!string.IsNullOrEmpty(database))
                    {
                        return database;
                    }
                    else
                    {
                        if (!string.IsNullOrEmpty(PBConStr))
                        {
                            database = PBConStr;
                        }
                    }
                    return database;
                }
                catch (Exception ex)
                {
                    return "";
                }
            }
        }

        /// <summary>
        /// 获取数据库
        /// </summary>
        /// <returns></returns>
        public MongoDatabase GetMongoDB()
        {
            return new MongoClient(connStr).GetServer().GetDatabase(ConnectionNamse);
        }

        public MongoCollection<BsonDocument> GetCol<T>()
        {
            return GetMongoDB().GetCollection(typeof(T).Name);
        }

        /// <summary>
        /// 新增
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="entity"></param>
        /// <returns></returns>
        public T Add<T>(T entity)
        {
            var col = GetCol<T>();
            col.Insert(entity);
            return entity;
        }

        /// <summary>
        /// 编辑
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="entity"></param>
        /// <param name="id"></param>
        public void Update<T>(T entity, string id)
        {
            var col = GetCol<T>();
            ObjectId tId = new ObjectId(id);
            BsonDocument bsd = BsonExtensionMethods.ToBsonDocument(entity);
            IMongoQuery query = Query.EQ("_id", tId);
            col.Update(query, new UpdateDocument(bsd));
        }

        /// <summary>
        /// 编辑
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="entity"></param>
        /// <param name="id"></param>
        public void Update<T>(IMongoQuery query, IMongoUpdate update, bool updateMulti = false)
        {
            var col = GetCol<T>();
            if (updateMulti)
            {
                col.Update(query, update, UpdateFlags.Multi);// 更新多条
                return;
            }
            col.Update(query, update);
        }

        /// <summary>
        /// 删除
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dics"></param>
        public void Delete<T>(Dictionary<string, object> dics)
        {
            var col = GetCol<T>();
            var query = new QueryDocument(dics);
            col.Remove(query);
        }

        /// <summary>
        /// 删除
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dics"></param>
        public void Delete<T>(IMongoQuery query)
        {
            var col = GetCol<T>();
            col.Remove(query);
        }

        /// <summary>
        /// 删除所有数据
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dics"></param>
        public void DeleteAll<T>()
        {
            var col = GetCol<T>();
            col.RemoveAll();
        }

        /// <summary>
        /// 删除
        /// remark:根据ObjectId删除
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="id"></param>
        public void Delete<T>(string id)
        {
            var col = GetCol<T>();
            ObjectId tId = new ObjectId(id);
            IMongoQuery query = Query.EQ("_id", tId);
            col.Remove(query);
        }

        /// <summary>
        /// 查找单个实体数据
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        public T Find<T>(IMongoQuery query)
        {
            var col = GetCol<T>();
            return col.FindAs<T>(query).FirstOrDefault();
        }

        /// <summary>
        /// 查找单个实体数据
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        public T FindById<T>(string id)
        {
            var col = GetCol<T>();
            ObjectId tId = new ObjectId(id);
            BsonDocument bsonDocument = col.FindOneById(tId);
            T t = BsonSerializer.Deserialize<T>(bsonDocument);
            return t;
        }

        /// <summary>
        /// 查询全部
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public List<T> QueryList<T>()
        {
            var col = GetCol<T>();
            var result = col.FindAllAs<T>();
            return result.ToList();
        }

        /// <summary>
        /// 根据条件查询
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dics"></param>
        /// <returns></returns>
        public List<T> QueryList<T>(Dictionary<string, object> dics)
        {
            var col = GetCol<T>();
            var query = new QueryDocument(dics);
            var result = col.FindAs<T>(query);
            return result.ToList<T>();
        }

        /// <summary>
        /// 分页查询
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public List<T> QueryPageList<T>(int pageIndex, int pageSize, IMongoQuery query, string[] sortFields)
        {
            var col = GetCol<T>();
            var result = col.FindAs<T>(query).SetSortOrder(SortBy.Descending(sortFields))
                            .Skip((pageIndex - 1) * pageSize)
                            .Take(pageSize)
                            .ToList();
            return result;
        }

        /// <summary>
        /// 查询条数
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        public long Count<T>(IMongoQuery query = null)
        {
            var col = GetCol<T>();
            long n = col.Count(query);
            return n;
        }
    }

    /**
     * 项目引用：MongoDB.Driver
     * 操作集合实体案例：
     *    /// <summary>
          /// 注意：实体名就是集合名称，必须一致
          /// </summary>
          [BsonIgnoreExtraElements]
          public class TEST
          {
              public ObjectId _id { get; set; }
              public string OrderId { get; set; }
              public string OrderCode { get; set; }
          }

         连接字符串配置：
         <appSettings>
            <add key="TEST" value="mongodb://TEST:[email protected]:27017/TEST"/>
         </appSettings>

         查询调用方式：
          //var sd = MongoDBConfig.MongoDBToolHelper_TEST.QueryList<TEST>();
            //var sd = MongoDBConfig.MongoDBToolHelper_TEST.QueryPageList<TEST>(1, 10, null, new string[] { "OrderId" });
            //var mdoel = MongoDBConfig.MongoDBToolHelper_TEST.Find<TEST>( Query.EQ("OrderId", "111"));
            var mdoel = MongoDBConfig.MongoDBToolHelper_TEST.FindById<TEST>("222");

        注意：所有操作的T实体，实体名称必须与集合名称一致
         
     */
}

下面是mongodb配置类，同上操作，这里只封装了基本的操作，如果有其他的操作可以自行封装

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Hy.DBUtility.Common
{
    /// <summary>
    /// mongodb数据库配置类
    /// </summary>
    public class MongoDBConfig
    {
        private static MongoDBToolHelper _MongoDBToolHelper_TEST;
        public static MongoDBToolHelper MongoDBToolHelper_TEST
        {
            get
            {
                if (_MongoDBToolHelper_TEST == null)
                {
                    _MongoDBToolHelper_TEST = new MongoDBToolHelper();
                    _MongoDBToolHelper_TEST.ConnectionNamse = "TEST";
                }
                return _MongoDBToolHelper_TEST;
            }
        }
    }
}