C# 对MongoDB 进行增删改查的简单操作实例

运用到的mongodb支持的c#驱动，当前版本为1.6.0

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1,连接数据库

        /// <summary>
        /// 数据库连接
         /// </summary>
        private const string conn = "mongodb://127.0.0.1:27017";
        /// <summary>
        /// 指定的数据库
         /// </summary>
        private const string dbname = "mongodb_name";
        /// <summary>
        /// 指定的表
         /// </summary>
        private const string tbname = "table_text";
　　　　　//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);

 2、插入数据

因为mongodb没有表的概念，所以自插入数据之前定义好自己的数据模型

user.cs

下面是添加数据的代码

        /// <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);

        }

3、删除操作

        /// <summary>
        /// 根据objectid 删除
        /// </summary>
        /// <param name="objid"></param>
        public static void delete(string 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", new objectid(objid));

            col.remove(query);
        }

4、修改

        /// <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));

        }

5、条件查询（简单）

        /// <summary>
        /// 根据objectid 查询
        /// </summary>
        public static tucao selectone(string 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", new objectid(objid)));
        }

6、查询全部

        /// <summary>
        /// 查询所有
        /// </summary>
        public static void 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());

            //--------------------------------
            foreach (tucao t in col.findall())
            {
                string id = t.id.tostring();
                string text = t.text;
                datetime dt = t.createdate;
            }
        }