MongoDB的简单操作（asp.net）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using MongoDB.Driver;
using MongoDB.Bson;
using MongoDB.Driver.Builders;

namespace web
{
    public class MongoHelper
    {
        /// <summary>
        /// 数据库连接
        /// </summary>
        private static string conn = "mongodb://127.0.0.1:27017";
        /// <summary>
        /// 指定的数据库
        /// </summary>
        private static string dbName = "mydb";
        /// <summary>
        /// 指定的表
        /// </summary>
        private static string tbName = "test";

        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="text">内容</param>
        /// <param name="articleId">文章ID</param>
        /// <param name="channelId">频道ID</param>
        /// <returns></returns>
        public static void Add(User t)
        {
            //创建数据连接
            MongoServer server = MongoServer.Create(conn);
            //获取指定数据库
            MongoDatabase db = server.GetDatabase(dbName);
            //获取表
            MongoCollection col = db.GetCollection(tbName);
            //插入
            col.Insert(t);

        }

        /// <summary>
        /// 根据ObjectID 删除
        /// </summary>
        /// <param name="objId"></param>
        public static void Delete(int objId)
        {
            //创建数据连接
            MongoServer server = MongoServer.Create(conn);
            //获取指定数据库
            MongoDatabase db = server.GetDatabase(dbName);
            //获取表
            MongoCollection<User> col = db.GetCollection<User>(tbName);

            IMongoQuery query = Query.EQ("_id", objId);

            col.Remove(query);
        }

        /// <summary>
        /// 根据ObjectID 修改
        /// </summary>
        public static void Update(User t)
        {
            //创建数据连接
            MongoServer server = MongoServer.Create(conn);
            //获取指定数据库
            MongoDatabase db = server.GetDatabase(dbName);
            //获取表
            MongoCollection<User> col = db.GetCollection<User>(tbName);

            BsonDocument bd = BsonExtensionMethods.ToBsonDocument(t);

            IMongoQuery query = Query.EQ("_id", t.id);

            col.Update(query, new UpdateDocument(bd));

        }

        //<summary>
        //根据ObjectID 查询
        //</summary>
        public static User SelectOne(int objId)
        {
            //创建数据连接
            MongoServer server = MongoServer.Create(conn);
            //获取指定数据库
            MongoDatabase db = server.GetDatabase(dbName);
            //获取表
            MongoCollection<User> col = db.GetCollection<User>(tbName);
            //条件查询           
            return col.FindOne(Query.EQ("_id", objId));
        }

        //<summary>
        //查询所有
        //</summary>
        public static List<User> SelectAll()
        {
            List<User> list = new List<User>();

            //创建数据连接
            MongoServer server = MongoServer.Create(conn);
            //获取指定数据库
            MongoDatabase db = server.GetDatabase(dbName);
            //获取表
            MongoCollection<User> col = db.GetCollection<User>(tbName);
            //查询全部
            list.AddRange(col.FindAll());
            return list;

        }

    }
}