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         #endregion
103
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                 try
115                 {
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         #endregion
137
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                 try
149                 {
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.Now
14                 });
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

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
}

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                 try
107                 {
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         #endregion
127
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                 try
141                 {
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         #endregion
166
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                 try
178                 {
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         #endregion
200
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                 try
212                 {
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         #endregion
234     }
235
236     #region 数据实体
237     /// <summary>
238 /// 数据实体
239 /// </summary>
240     public class Person
241     {
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     #endregion
252 }

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。


转自：http://www.cnblogs.com/huangxincheng/archive/2012/03/09/2386054.html