using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using MongoDB.Bson;
using MongoDB.Driver;
using MongoDB.Driver.Builders;
namespace MvcMongoDemo.Common
{
    public class MongoHelper<T> where T:class
    {
        private string conn = "mongodb://localhost";
        private string dbName = "test";
        private string collectionName;
        //string collection = "user";
        private MongoDatabase db;

        public MongoHelper()
        {
            db = GetCollection();
            collectionName = typeof(T).Name;
        }

        /// <summary>
        /// 设置你collection
        /// </summary>
        private MongoDatabase GetCollection()
        {
            MongoClient client = new MongoClient(conn);
          return  client.GetServer().GetDatabase(dbName);

        }
        /// <summary>
        /// 获取所有的数据
        /// </summary>
        /// <returns></returns>
        public List<T> GetAllList() 
        {

            return db.GetCollection<T>(collectionName).FindAll().ToList();

               
        }
        /// <summary>
        /// 根据条件查询获取数据
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        public List<T> GetList(IMongoQuery query) 
        {
          
        
          return  db.GetCollection<T>(collectionName).Find(query).ToList();
        }


        /// <summary>
        /// 分页查询获取数据信息
        /// </summary>
        /// <param name="query">where条件</param>
        /// <param name="totalCount">总条数</param>
        /// <param name="pageIndex">当前页</param>
        /// <param name="pageSize">每页显示数量</param>
        /// <returns></returns>
        public List<T> GetListPage(IMongoQuery query,out int totalCount, int pageIndex=1,int pageSize=10)
        {

            totalCount = int.Parse(db.GetCollection<T>(collectionName).Find(query).Count().ToString());
            return db.GetCollection<T>(collectionName).Find(query).Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();
        }

        /// <summary>
        /// 根据条件查询返回单条数据
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        public T GetSign(IMongoQuery query)
        {

            return db.GetCollection<T>(collectionName).FindOne(query);
        }

        /// <summary>
        /// 根据主键_id查询获取单条数据
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public T GetSign(BsonValue id)
        {

            return db.GetCollection<T>(collectionName).FindOneById(id);
        }


        /// <summary>
        /// 单条数据添加
        /// </summary>
        /// <param name="model"></param>
        public void Add(T model) 
        {
        
            db.GetCollection<T>(collectionName).Insert<T>(model);
        }


        /// <summary>
        /// 批量添加数据
        /// </summary>
        /// <param name="list"></param>
        public void AddtBatch(List<T> list) 
        {
            db.GetCollection<T>(collectionName).InsertBatch<T>(list);
        }

        /// <summary>
        /// 根据条件删除数据
        /// </summary>
        /// <param name="query"></param>
        public void Delete(IMongoQuery query) 
        {
            db.GetCollection<T>(collectionName).Remove(query);

        }

        /// <summary>
        /// 删除所有数据记录
        /// </summary>
        public void DeleteAll() 
        {
            db.GetCollection<T>(collectionName).RemoveAll();
        }

        /// <summary>
        /// 更新单个字段值
        /// </summary>
        /// <param name="query"></param>
        /// <param name="updateQuery"></param>
        public void Modity(IMongoQuery query,IMongoUpdate updateQuery ) 
        {
            
            db.GetCollection<T>(collectionName).Update(query,updateQuery,UpdateFlags.Multi);
                
        }


        /// <summary>
        /// 更新多个字段值
        /// </summary>
        /// <param name="query"></param>
        /// <param name="updates"></param>
        public void Modity(IMongoQuery query, UpdateBuilder[] updates)
        {

            WriteConcernResult result = db.GetCollection<T>(collectionName).Update(query, Update.Combine(updates), UpdateFlags.Multi);
            

        }


    }
}

Common.MongoHelper<UserInfo> mongoHelp = new Common.MongoHelper<UserInfo>();
List<UserInfo> list = new List<UserInfo>();
for (int i = 1; i <= 5; i++)
{
UserInfo model = new UserInfo();

model.ID = i;
model.Name = "用户" + i;
model.Age = 100 - i;
model.Gender = i % 3 == 0 ? true : false;
model.Address = "地址" + i;
model.AddTime = System.DateTime.Now.AddDays(-i);

//单条数据记录添加
// mongoHelp.Add(model);
list.Add(model);


}

//批量插入
// mongoHelp.AddtBatch(list);

 IMongoQuery query = null;
            query = Query.And(
                Query.EQ("Name", "用户2")

               );


          //根据条件删除 
            mongoHelp.Delete(query);

        //删除所有数据
             mongoHelp.DeleteAll(); 

 IMongoQuery queryWhere = Query.And(Query.EQ("ID",1));

            List<UpdateBuilder> updateList = new List<UpdateBuilder>();
            updateList.Add(Update.Set("Address", "我现在住在北京哈哈```"));
            updateList.Add(Update.Set("Name", "用户修改过的1"));
            updateList.Add(Update.Set("Age", 1002));

            IMongoUpdate update = Update.Set("Name", "用户修改过的");
           
                //对单个字段值进行更新
                mongoHelp.Modity(queryWhere, update);
              
                //更新多个字段值
                mongoHelp.Modity(queryWhere, updateList.ToArray()); 

      //根据_id索引去查询单条数据
            UserInfo model2=null;
                BsonValue id = "5973374e718e126c2801b81d";
             model2= mongoHelp.GetSign(id);


                //根据条件去查询数据
             model2 = mongoHelp.GetSign(queryWhere);
             List<UserInfo> listModel = new List<UserInfo>();

                //查询返回多条数据记录
             listModel = mongoHelp.GetList(queryWhere);
              
              //获取所有数据记录
             listModel = mongoHelp.GetAllList();

                //分页获取数据
             int totalCount = 0;
             listModel = mongoHelp.GetListPage(queryWhere, out totalCount, 1, 10);

 public class UserInfo 
   {

       /// <summary>
       /// 主键索引,没有该字段更新数据时会报异常
       /// </summary>
       public ObjectId _id { get; set; }
       public int ID { get; set; }

       public string Name { get; set; }

       public int Age { get; set; }

       public bool Gender { get; set; }

       public string Address { get; set; }

       public DateTime AddTime { get; set; }
   }