MongoDB入门教程之C#驱动操作实例

作为系列的最后一篇，得要说说c#驱动对mongodb的操作，目前驱动有两种：官方驱动和samus驱动，不过我个人还是喜欢后者，

因为提供了丰富的linq操作，相当方便。

官方驱动：。下载后，还提供了一个酷似msdn的帮助文档。

samus驱动：。

下面就具体看看samus驱动，https://github.com/samus/mongodb-csharp/blob/master/examples/simple/main.cs上面提供了

一个简单的demo，大体上看看我们就知道怎么玩了。

一： 实践

1：我们建立一个person实体，mongoalias特性表示取别名，这里的id值将会覆盖掉数据库自动生成的_id。

#region 数据实体
    /// <summary>
/// 数据实体
/// </summary>
    public class person
    {
        [mongoalias("_id")]
        public string id { get; set; }

        public string name { get; set; }

        public int age { get; set; }

        public datetime createtime { get; set; }
    }
    #endregion

2：初始化一些变量

string connectionstring = string.empty;

        string databasename = string.empty;

        string collectionname = string.empty;

        static mongodbhelper<t> mongodb;

        #region 初始化操作
/// <summary>
/// 初始化操作
/// </summary>
        public mongodbhelper()
        {
            connectionstring = "server=127.0.0.1:2222";
            databasename = "shopex";
            collectionname = "person";
        }
        #endregion

3：为了方便t的继承类使用linq功能，我们还需要映射一下。

#region 实现linq查询的映射配置
        /// <summary>
/// 实现linq查询的映射配置
/// </summary>
        public mongoconfiguration configuration
        {
            get
            {
                var config = new mongoconfigurationbuilder();

                config.mapping(mapping =>
                {
                    mapping.defaultprofile(profile =>
                    {
                        profile.subclassesare(t => t.issubclassof(typeof(t)));
                    });
                    mapping.map<t>();
                    mapping.map<t>();
                });

                config.connectionstring(connectionstring);

                return config.buildconfiguration();
            }
        }
        #endregion

4：下面是一些基本的curd的代码，跟写ef代码很类似，写起来好舒服。

#region 插入操作
        /// <summary>
/// 插入操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public void insert(t t)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    collection.insert(t, true);

                    mongo.disconnect();

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 更新操作
        /// <summary>
/// 更新操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public void update(t t, expression<func<t, bool>> func)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    collection.update<t>(t, func, true);

                    mongo.disconnect();

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 获取集合
        /// <summary>
///获取集合
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public list<t> list(int pageindex, int pagesize, expression<func<t, bool>> func, out int pagecount)
        {
            pagecount = 0;

            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    pagecount = convert.toint32(collection.count());

                    var personlist = collection.linq().where(func).skip(pagesize * (pageindex - 1))
                                                   .take(pagesize).select(i => i).tolist();

                    mongo.disconnect();

                    return personlist;

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 读取单条记录
        /// <summary>
///读取单条记录
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public t single(expression<func<t, bool>> func)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    var single = collection.linq().firstordefault(func);

                    mongo.disconnect();

                    return single;

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 删除操作
        /// <summary>
/// 删除操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public void delete(expression<func<t, bool>> func)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    //这个地方要注意，一定要加上t参数，否则会当作object类型处理
//导致删除失败
                    collection.remove<t>(func);

                    mongo.disconnect();

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

5.   好，我们开一下2222端口，由于前前篇我已经把这个mongodb做成了服务，现在就直接连过去了，并做一下对name的索引。

6. 一切准备妥当，我们做下基本的操作，比如这里我添加一千条数据，注意我开启的是安全模式，如果插入不成功，将会抛出异常。

 <1> add:

 

 static void main(string[] args)
        {
            mongodbhelper<person> helper = new mongodbhelper<person>();

            //插入1000条数据
            for (int i = 0; i < 1000; i++)
            {
                helper.insert(new person()
                {
                    id = guid.newguid().tostring(),
                    name = "jack" + i,
                    age = i,
                    createtime = datetime.now
                });
            }

            console.writeline("插入成功");

            console.read();
        }
 

 乍一看显示的数据以为有问题，为什么没有出现jack0或者jack999，不过find的一下后心情舒坦了。

<2> update:   这里就把jack941的名字改掉“mary”

static void main(string[] args)
        {
            mongodbhelper<person> helper = new mongodbhelper<person>();

            //修改jack941改成mary
            var single = helper.single(i => i.name == "jack941");
            single.name = "mary";
            helper.update(single, i => i.id == single.id);

            console.writeline("修改成功");
            console.read();
        }

<3>delete：  删除mary这条记录

static void main(string[] args)
        {
            mongodbhelper<person> helper = new mongodbhelper<person>();

            //删除mary这个记录
            helper.delete(i => i.name == "mary");

            console.writeline("删除成功");
            console.read();
        }

<4> list操作： 这里我获取一下名字里面带9的人数列表

static void main(string[] args)
        {
            mongodbhelper<person> helper = new mongodbhelper<person>();

            int pagecount;

            //获取名字里面带9的人数
            var list = helper.list(1, 20, i => i.name.contains("9"), out pagecount);

           console.read();
        }

总的运行代码

using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.configuration;
using system.linq.expressions;

using mongodb.configuration;
using mongodb.linq;
using mongodb.attributes;

namespace mongodb.test
{
    public class mongodbhelper<t> where t : class
    {
        string connectionstring = string.empty;

        string databasename = string.empty;

        string collectionname = string.empty;

        static mongodbhelper<t> mongodb;

        #region 初始化操作
        /// <summary>
/// 初始化操作
/// </summary>
        public mongodbhelper()
        {
            connectionstring = "server=127.0.0.1:2222";
            databasename = "shopex";
            collectionname = "person";
        }
        #endregion

        #region 实现linq查询的映射配置
        /// <summary>
/// 实现linq查询的映射配置
/// </summary>
        public mongoconfiguration configuration
        {
            get
            {
                var config = new mongoconfigurationbuilder();

                config.mapping(mapping =>
                {
                    mapping.defaultprofile(profile =>
                    {
                        profile.subclassesare(t => t.issubclassof(typeof(t)));
                    });
                    mapping.map<t>();
                    mapping.map<t>();
                });

                config.connectionstring(connectionstring);

                return config.buildconfiguration();
            }
        }
        #endregion

        #region 插入操作
        /// <summary>
/// 插入操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public void insert(t t)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    collection.insert(t, true);

                    mongo.disconnect();

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 更新操作
        /// <summary>
/// 更新操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public void update(t t, expression<func<t, bool>> func)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    collection.update<t>(t, func, true);

                    mongo.disconnect();

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 获取集合
        /// <summary>
///获取集合
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public list<t> list(int pageindex, int pagesize, expression<func<t, bool>> func, out int pagecount)
        {
            pagecount = 0;

            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    pagecount = convert.toint32(collection.count());

                    var personlist = collection.linq().where(func).skip(pagesize * (pageindex - 1))
                                                   .take(pagesize).select(i => i).tolist();

                    mongo.disconnect();

                    return personlist;

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 读取单条记录
        /// <summary>
///读取单条记录
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public t single(expression<func<t, bool>> func)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    var single = collection.linq().firstordefault(func);

                    mongo.disconnect();

                    return single;

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion

        #region 删除操作
        /// <summary>
/// 删除操作
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
        public void delete(expression<func<t, bool>> func)
        {
            using (mongo mongo = new mongo(configuration))
            {
                try
                {
                    mongo.connect();

                    var db = mongo.getdatabase(databasename);

                    var collection = db.getcollection<t>(collectionname);

                    //这个地方要注意，一定要加上t参数，否则会当作object类型处理
//导致删除失败
                    collection.remove<t>(func);

                    mongo.disconnect();

                }
                catch (exception)
                {
                    mongo.disconnect();
                    throw;
                }
            }
        }
        #endregion
    }

    #region 数据实体
    /// <summary>
/// 数据实体
/// </summary>
    public class person
    {
        [mongoalias("_id")]
        public string id { get; set; }

        public string name { get; set; }

        public int age { get; set; }

        public datetime createtime { get; set; }
    }
    #endregion
}