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;         }     }
 }