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。
号外：博主的《完整版MongoDB 3.0 视频教程 》正在淘宝热销，购买的请抓紧哟!
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。
1 #region 数据实体 2 /// <summary> 3 /// 数据实体 4 /// </summary> 5 public class Person 6 { 7 [MongoAlias("_id")] 8 public string ID { get; set; } 9 10 public string Name { get; set; }11 12 public int Age { get; set; }13 14 public DateTime CreateTime { get; set; }15 }16 #endregion
2：初始化一些变量
1 string connectionString = string.Empty; 2 3 string databaseName = string.Empty; 4 5 string collectionName = string.Empty; 6 7 static MongodbHelper<T> mongodb; 8 9 #region 初始化操作10 /// <summary>11 /// 初始化操作12 /// </summary>13 public MongodbHelper()14 {15 connectionString = "Server=127.0.0.1:2222";16 databaseName = "shopex";17 collectionName = "person";18 }19 #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。
1 #region 实现linq查询的映射配置 2 /// <summary> 3 /// 实现linq查询的映射配置 4 /// </summary> 5 public MongoConfiguration configuration 6 { 7 get 8 { 9 var config = new MongoConfigurationBuilder();10 11 config.Mapping(mapping =>12 {13 mapping.DefaultProfile(profile =>14 {15 profile.SubClassesAre(t => t.IsSubclassOf(typeof(T)));16 });17 mapping.Map<T>();18 mapping.Map<T>();19 });20 21 config.ConnectionString(connectionString);22 23 return config.BuildConfiguration();24 }25 }26 #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。
1 #region 插入操作 2 /// <summary> 3 /// 插入操作 4 /// </summary> 5 /// <param name="person"></param> 6 /// <returns></returns> 7 public void Insert(T t) 8 { 9 using (Mongo mongo = new Mongo(configuration)) 10 { 11 try 12 { 13 mongo.Connect(); 14 15 var db = mongo.GetDatabase(databaseName); 16 17 var collection = db.GetCollection<T>(collectionName); 18 19 collection.Insert(t, true); 20 21 mongo.Disconnect(); 22 23 } 24 catch (Exception) 25 { 26 mongo.Disconnect(); 27 throw; 28 } 29 } 30 } 31 #endregion 32 33 #region 更新操作 34 /// <summary> 35 /// 更新操作 36 /// </summary> 37 /// <param name="person"></param> 38 /// <returns></returns> 39 public void Update(T t, Expression<Func<T, bool>> func) 40 { 41 using (Mongo mongo = new Mongo(configuration)) 42 { 43 try 44 { 45 mongo.Connect(); 46 47 var db = mongo.GetDatabase(databaseName); 48 49 var collection = db.GetCollection<T>(collectionName); 50 51 collection.Update<T>(t, func, true); 52 53 mongo.Disconnect(); 54 55 } 56 catch (Exception) 57 { 58 mongo.Disconnect(); 59 throw; 60 } 61 } 62 } 63 #endregion 64 65 #region 获取集合 66 /// <summary> 67 ///获取集合 68 /// </summary> 69 /// <param name="person"></param> 70 /// <returns></returns> 71 public List<T> List(int pageIndex, int pageSize, Expression<Func<T, bool>> func, out int pageCount) 72 { 73 pageCount = 0; 74 75 using (Mongo mongo = new Mongo(configuration)) 76 { 77 try 78 { 79 mongo.Connect(); 80 81 var db = mongo.GetDatabase(databaseName); 82 83 var collection = db.GetCollection<T>(collectionName); 84 85 pageCount = Convert.ToInt32(collection.Count()); 86 87 var personList = collection.Linq().Where(func).Skip(pageSize * (pageIndex - 1)) 88 .Take(pageSize).Select(i => i).ToList(); 89 90 mongo.Disconnect(); 91 92 return personList; 93 94 } 95 catch (Exception) 96 { 97 mongo.Disconnect(); 98 throw; 99 }100 }101 }102 #endregion103 104 #region 读取单条记录105 /// <summary>106 ///读取单条记录107 /// </summary>108 /// <param name="person"></param>109 /// <returns></returns>110 public T Single(Expression<Func<T, bool>> func)111 {112 using (Mongo mongo = new Mongo(configuration))113 {114 try115 {116 mongo.Connect();117 118 var db = mongo.GetDatabase(databaseName);119 120 var collection = db.GetCollection<T>(collectionName);121 122 var single = collection.Linq().FirstOrDefault(func);123 124 mongo.Disconnect();125 126 return single;127 128 }129 catch (Exception)130 {131 mongo.Disconnect();132 throw;133 }134 }135 }136 #endregion137 138 #region 删除操作139 /// <summary>140 /// 删除操作141 /// </summary>142 /// <param name="person"></param>143 /// <returns></returns>144 public void Delete(Expression<Func<T, bool>> func)145 {146 using (Mongo mongo = new Mongo(configuration))147 {148 try149 {150 mongo.Connect();151 152 var db = mongo.GetDatabase(databaseName);153 154 var collection = db.GetCollection<T>(collectionName);155 156 //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157 //导致删除失败158 collection.Remove<T>(func);159 160 mongo.Disconnect();161 162 }163 catch (Exception)164 {165 mongo.Disconnect();166 throw;167 }168 }169 }170 #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:
1 static void Main(string[] args) 2 { 3 MongodbHelper<Person> helper = new MongodbHelper<Person>(); 4 5 //插入1000条数据 6 for (int i = 0; i < 1000; i++) 7 { 8 helper.Insert(new Person() 9 {10 ID = Guid.NewGuid().ToString(),11 Name = "jack" + i,12 Age = i,13 CreateTime = DateTime.Now14 });15 }16 17 Console.WriteLine("插入成功");18 19 Console.Read();20 }
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”
1 static void Main(string[] args) 2 { 3 MongodbHelper<Person> helper = new MongodbHelper<Person>(); 4 5 //修改jack941改成mary 6 var single = helper.Single(i => i.Name == "jack941"); 7 single.Name = "mary"; 8 helper.Update(single, i => i.ID == single.ID); 9 10 Console.WriteLine("修改成功");11 Console.Read();12 }
<3>Delete： 删除mary这条记录
1 static void Main(string[] args) 2 { 3 MongodbHelper<Person> helper = new MongodbHelper<Person>(); 4 5 //删除mary这个记录 6 helper.Delete(i => i.Name == "mary"); 7 8 Console.WriteLine("删除成功"); 9 Console.Read();10 }
<4> list操作： 这里我获取一下名字里面带9的人数列表
1 static void Main(string[] args) 2 { 3 MongodbHelper<Person> helper = new MongodbHelper<Person>(); 4 5 int pagecount; 6 7 //获取名字里面带9的人数 8 var list = helper.List(1, 20, i => i.Name.Contains("9"), out pagecount); 9 10 Console.Read();11 }
总的运行代码
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Configuration; 6 using System.Linq.Expressions; 7 8 using MongoDB.Configuration; 9 using MongoDB.Linq; 10 using MongoDB.Attributes; 11 12 13 namespace MongoDB.Test 14 { 15 public class MongodbHelper<T> where T : class 16 { 17 string connectionString = string.Empty; 18 19 string databaseName = string.Empty; 20 21 string collectionName = string.Empty; 22 23 static MongodbHelper<T> mongodb; 24 25 #region 初始化操作 26 /// <summary> 27 /// 初始化操作 28 /// </summary> 29 public MongodbHelper() 30 { 31 connectionString = "Server=127.0.0.1:2222"; 32 databaseName = "shopex"; 33 collectionName = "person"; 34 } 35 #endregion 36 37 #region 实现linq查询的映射配置 38 /// <summary> 39 /// 实现linq查询的映射配置 40 /// </summary> 41 public MongoConfiguration configuration 42 { 43 get 44 { 45 var config = new MongoConfigurationBuilder(); 46 47 config.Mapping(mapping => 48 { 49 mapping.DefaultProfile(profile => 50 { 51 profile.SubClassesAre(t => t.IsSubclassOf(typeof(T))); 52 }); 53 mapping.Map<T>(); 54 mapping.Map<T>(); 55 }); 56 57 config.ConnectionString(connectionString); 58 59 return config.BuildConfiguration(); 60 } 61 } 62 #endregion 63 64 #region 插入操作 65 /// <summary> 66 /// 插入操作 67 /// </summary> 68 /// <param name="person"></param> 69 /// <returns></returns> 70 public void Insert(T t) 71 { 72 using (Mongo mongo = new Mongo(configuration)) 73 { 74 try 75 { 76 mongo.Connect(); 77 78 var db = mongo.GetDatabase(databaseName); 79 80 var collection = db.GetCollection<T>(collectionName); 81 82 collection.Insert(t, true); 83 84 mongo.Disconnect(); 85 86 } 87 catch (Exception) 88 { 89 mongo.Disconnect(); 90 throw; 91 } 92 } 93 } 94 #endregion 95 96 #region 更新操作 97 /// <summary> 98 /// 更新操作 99 /// </summary>100 /// <param name="person"></param>101 /// <returns></returns>102 public void Update(T t, Expression<Func<T, bool>> func)103 {104 using (Mongo mongo = new Mongo(configuration))105 {106 try107 {108 mongo.Connect();109 110 var db = mongo.GetDatabase(databaseName);111 112 var collection = db.GetCollection<T>(collectionName);113 114 collection.Update<T>(t, func, true);115 116 mongo.Disconnect();117 118 }119 catch (Exception)120 {121 mongo.Disconnect();122 throw;123 }124 }125 }126 #endregion127 128 #region 获取集合129 /// <summary>130 ///获取集合131 /// </summary>132 /// <param name="person"></param>133 /// <returns></returns>134 public List<T> List(int pageIndex, int pageSize, Expression<Func<T, bool>> func, out int pageCount)135 {136 pageCount = 0;137 138 using (Mongo mongo = new Mongo(configuration))139 {140 try141 {142 mongo.Connect();143 144 var db = mongo.GetDatabase(databaseName);145 146 var collection = db.GetCollection<T>(collectionName);147 148 pageCount = Convert.ToInt32(collection.Count());149 150 var personList = collection.Linq().Where(func).Skip(pageSize * (pageIndex - 1))151 .Take(pageSize).Select(i => i).ToList();152 153 mongo.Disconnect();154 155 return personList;156 157 }158 catch (Exception)159 {160 mongo.Disconnect();161 throw;162 }163 }164 }165 #endregion166 167 #region 读取单条记录168 /// <summary>169 ///读取单条记录170 /// </summary>171 /// <param name="person"></param>172 /// <returns></returns>173 public T Single(Expression<Func<T, bool>> func)174 {175 using (Mongo mongo = new Mongo(configuration))176 {177 try178 {179 mongo.Connect();180 181 var db = mongo.GetDatabase(databaseName);182 183 var collection = db.GetCollection<T>(collectionName);184 185 var single = collection.Linq().FirstOrDefault(func);186 187 mongo.Disconnect();188 189 return single;190 191 }192 catch (Exception)193 {194 mongo.Disconnect();195 throw;196 }197 }198 }199 #endregion200 201 #region 删除操作202 /// <summary>203 /// 删除操作204 /// </summary>205 /// <param name="person"></param>206 /// <returns></returns>207 public void Delete(Expression<Func<T, bool>> func)208 {209 using (Mongo mongo = new Mongo(configuration))210 {211 try212 {213 mongo.Connect();214 215 var db = mongo.GetDatabase(databaseName);216 217 var collection = db.GetCollection<T>(collectionName);218 219 //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220 //导致删除失败221 collection.Remove<T>(func);222 223 mongo.Disconnect();224 225 }226 catch (Exception)227 {228 mongo.Disconnect();229 throw;230 }231 }232 }233 #endregion234 }235 236 #region 数据实体237 /// <summary>238 /// 数据实体239 /// </summary>240 public class Person241 {242 [MongoAlias("_id")]243 public string ID { get; set; }244 245 public string Name { get; set; }246 247 public int Age { get; set; }248 249 public DateTime CreateTime { get; set; }250 }251 #endregion252 }
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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