MongoDb多条件查询

先从网上下载MongoDB。地址http://www.mongodb.org/，找到适合自己的下载

这是我下载的。

在E盘新建个文件夹，将刚才下载的zip解压，将其中bin目录下的文件全部拷贝至刚才新建的文件夹。

然后在其中再建立个data文件夹。

然后通过cmd去启动你的MongoDB

看我红线框出来的即可。上面打错了 - -

 

将mongodb添加至系统服务中：

E:\webdev\mongodb>mongod --logpath e:\webdev\mongodb\logs\mongodb.log --logappen d --dbpath e:\webdev\mongodb\data --directoryperdb --serviceName MongoDB --install

 

然后访问localhost:27017看到如下所示，就表示你的MongoDB已经启动完毕

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization;
using System.Data;
using System.Data.SqlClient;
using MongoDB.Bson;
using MongoDB.Driver;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //连接信息
            string conn = "mongodb://localhost";
            string database = "demoBase";
            string collection = "demoCollection";

            MongoServer mongodb = MongoServer.Create(conn);//连接数据库
            MongoDatabase mongoDataBase = mongodb.GetDatabase(database);//选择数据库名
            MongoCollection mongoCollection = mongoDataBase.GetCollection(collection);//选择集合，相当于表

            mongodb.Connect();

            //普通插入
            var o = new { Uid = 123, Name = "xixiNormal", PassWord = "111111" };
            mongoCollection.Insert(o);

            //对象插入
            Person p = new Person { Uid = 124, Name = "xixiObject", PassWord = "222222" };
            mongoCollection.Insert(p);

            //BsonDocument 插入
            BsonDocument b = new BsonDocument();
            b.Add("Uid", 125);
            b.Add("Name", "xixiBson");
            b.Add("PassWord", "333333");
            mongoCollection.Insert(b);

            Console.ReadLine();
        }
    }

    class Person {
        public int Uid;
        public string Name;
        public string PassWord;

    }
}

 

 

结果：

都是上述配置写的，程序会自动建立对应的库和集合。

下面的操作不上完整代码了:

 

 

            /*---------------------------------------------
             * sql : SELECT * FROM table 
             *---------------------------------------------
             */
            MongoCursor<Person> p = mongoCollection.FindAllAs<Person>();

            /*---------------------------------------------
             * sql : SELECT * FROM table WHERE Uid > 10 AND Uid < 20
             *---------------------------------------------
             */
            QueryDocument query = new QueryDocument();
            BsonDocument b = new BsonDocument();
            b.Add("$gt", 10);
            b.Add("$lt", 20);
            query.Add("Uid", b);

            MongoCursor<Person> m = mongoCollection.FindAs<Person>(query);

            /*-----------------------------------------------
             * sql : SELECT COUNT(*) FROM table WHERE Uid > 10 AND Uid < 20
             *-----------------------------------------------
             */
            long c = mongoCollection.Count(query);

            /*-----------------------------------------------
            * sql : SELECT Name FROM table WHERE Uid > 10 AND Uid < 20
            *-----------------------------------------------
            */
            QueryDocument query = new QueryDocument();
            BsonDocument b = new BsonDocument();
            b.Add("$gt", 10);
            b.Add("$lt", 20);
            query.Add("Uid", b);
            FieldsDocument f = new FieldsDocument();
            f.Add("Name", 1);

            MongoCursor<Person> m = mongoCollection.FindAs<Person>(query).SetFields(f);
            /*-----------------------------------------------
            * sql : SELECT * FROM table ORDER BY Uid DESC LIMIT 10,10
            *-----------------------------------------------
            */
            QueryDocument query = new QueryDocument();
            SortByDocument s = new SortByDocument();
            s.Add("Uid", -1);//-1=DESC

            MongoCursor<Person> m = mongoCollection.FindAllAs<Person>().SetSortOrder(s).SetSkip(10).SetLimit(10);

 

　　

 

 

原文地址为：http://www.cnblogs.com/yimiao/archive/2011/11/11/2245637.html