8天学通MongoDB第八天 驱动实践
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:https://github.com/mongodb/mongo-csharp-driver/downloads。下载后,还提供了一个酷
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:https://github.com/mongodb/mongo-csharp-driver/downloads。下载后,还提供了一个酷似msdn的帮助文档。
samus驱动:https://github.com/samus/mongodb-csharp/downloads。
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 ////// 数据实体 /// 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 MongodbHelpermongodb; #region 初始化操作 /// /// 初始化操作 /// 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 ////// 实现linq查询的映射配置 /// public MongoConfiguration configuration { get { var config = new MongoConfigurationBuilder(); config.Mapping(mapping => { mapping.DefaultProfile(profile => { profile.SubClassesAre(t => t.IsSubclassOf(typeof(T))); }); mapping.Map(); mapping.Map (); }); 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 ////// 插入操作 /// /// ///public void Insert(T t) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (collectionName); collection.Insert(t, true); mongo.Disconnect(); } catch (Exception) { mongo.Disconnect(); throw; } } } #endregion #region 更新操作 /// /// 更新操作 /// /// ///public void Update(T t, Expression > func) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (collectionName); collection.Update (t, func, true); mongo.Disconnect(); } catch (Exception) { mongo.Disconnect(); throw; } } } #endregion #region 获取集合 /// ///获取集合 /// /// ///public List List(int pageIndex, int pageSize, Expression > func, out int pageCount) { pageCount = 0; using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (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 /// ///读取单条记录 /// /// ///public T Single(Expression > func) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (collectionName); var single = collection.Linq().FirstOrDefault(func); mongo.Disconnect(); return single; } catch (Exception) { mongo.Disconnect(); throw; } } } #endregion #region 删除操作 /// /// 删除操作 /// /// ///public void Delete(Expression > func) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (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 (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。
Add:
static void Main(string[] args) { MongodbHelperhelper = new MongodbHelper (); //插入1000条数据 for (int i = 0; i
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。
update: 这里就把jack941的名字改掉“mary”
static void Main(string[] args) { MongodbHelperhelper = new MongodbHelper (); //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(); }
Delete: 删除mary这条记录
static void Main(string[] args) { MongodbHelperhelper = new MongodbHelper (); //删除mary这个记录 helper.Delete(i => i.Name == "mary"); Console.WriteLine("删除成功"); Console.Read(); }
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) { MongodbHelperhelper = new MongodbHelper (); 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 MongodbHelperwhere T : class { string connectionString = string.Empty; string databaseName = string.Empty; string collectionName = string.Empty; static MongodbHelper mongodb; #region 初始化操作 /// /// 初始化操作 /// 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 ////// 实现linq查询的映射配置 /// public MongoConfiguration configuration { get { var config = new MongoConfigurationBuilder(); config.Mapping(mapping => { mapping.DefaultProfile(profile => { profile.SubClassesAre(t => t.IsSubclassOf(typeof(T))); }); mapping.Map(); mapping.Map (); }); config.ConnectionString(connectionString); return config.BuildConfiguration(); } } #endregion #region 插入操作 /// /// 插入操作 /// /// ///public void Insert(T t) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (collectionName); collection.Insert(t, true); mongo.Disconnect(); } catch (Exception) { mongo.Disconnect(); throw; } } } #endregion #region 更新操作 /// /// 更新操作 /// /// ///public void Update(T t, Expression > func) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (collectionName); collection.Update (t, func, true); mongo.Disconnect(); } catch (Exception) { mongo.Disconnect(); throw; } } } #endregion #region 获取集合 /// ///获取集合 /// /// ///public List List(int pageIndex, int pageSize, Expression > func, out int pageCount) { pageCount = 0; using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (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 /// ///读取单条记录 /// /// ///public T Single(Expression > func) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (collectionName); var single = collection.Linq().FirstOrDefault(func); mongo.Disconnect(); return single; } catch (Exception) { mongo.Disconnect(); throw; } } } #endregion #region 删除操作 /// /// 删除操作 /// /// ///public void Delete(Expression > func) { using (Mongo mongo = new Mongo(configuration)) { try { mongo.Connect(); var db = mongo.GetDatabase(databaseName); var collection = db.GetCollection (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 (func); mongo.Disconnect(); } catch (Exception) { mongo.Disconnect(); throw; } } } #endregion } #region 数据实体 /// /// 数据实体 /// 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 }
wow,趁着3天的休假,不断的努力终于把这个系列写完了,很感谢一直关注此系列的朋友
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