C# / .Net Core 访问MongoDb库_.NET_编程开发_程序员俱乐部

话不多说直接上代码

连接字符串：

{
  "AppSettings": {
    "mongodb": "mongodb://用户名:密码@IP地址:端口号"
  }
}

主体代码：

 1 using ABCDEFG.Config;
 2 using MongoDB.Driver;
 3 using System;
 4 using System.Collections.Generic;
 5 using System.Linq.Expressions;
 6 using System.Text;
 7 
 8 namespace Mongodb
 9 {
10     public class MongoContext
11     {
12         public MongoContext()
13         {
14             Client = new MongoClient(ABCDEFG..GetAppSetting("mongodb"));
15         }
16         
17         public MongoContext(string connectionName)
18         {
19             Client = new MongoClient(MengTConfig.GetAppSetting(connectionName));
20         }
21 
22         private MongoClient Client { get; set; }
23 
24         private IMongoDatabase DataBase { get => Client.GetDatabase("MengTLog"); }
25 
26         public IMongoCollection<T> DbSet<T>() where T : IMongoModel => DataBase.GetCollection<T>("MengTLog.Logger");
27 
28     }
29 
30     public static class MongoExtend
31     {
32         public static void Add<T>(this IMongoCollection<T> collenction, T Model) where T : IMongoModel
33                   => collenction.InsertOne(Model);
34 
35         public static void AddList<T>(this IMongoCollection<T> collenction, List<T> Model) where T : IMongoModel
36                  => collenction.InsertMany(Model);
37 
38         /// <summary>
39         /// 查找第一个
40         /// </summary>
41         public static T FirstOrDefault<T>(this IMongoCollection<T> collenction,Expression<Func<T, bool>> expression) where T : IMongoModel
42         {
43             if (expression == null) { throw new ArgumentNullException("参数无效"); }
44             return collenction.Find(expression).FirstOrDefault();
45         }
46 
47         /// <summary>
48         /// 查找符合数据列表
49         /// </summary>
50         public static List<T> FindToList<T>(this IMongoCollection<T> collenction, Expression<Func<T, bool>> expression) where T : IMongoModel
51         {
52             if (expression == null) { throw new ArgumentNullException("参数无效"); }
53             return collenction.Find(expression).ToList();
54         }
55 
56         /// <summary>
57         /// 删除全部匹配数据
58         /// </summary>
59         public static void Delete<T>(this IMongoCollection<T> collenction, Expression<Func<T, bool>> expression) where T : IMongoModel
60         {
61             if (expression == null) { throw new ArgumentNullException("参数无效"); }
62             collenction.DeleteManyAsync(expression);
63         }
64 
65 
66         /// <summary>
67         /// 删除一个
68         /// </summary>
69         public static void DeleteOne<T>(this IMongoCollection<T> collenction, Expression<Func<T, bool>> expression) where T : IMongoModel
70         {
71             if (expression == null) { throw new ArgumentNullException("参数无效"); }
72             collenction.DeleteOneAsync(expression);
73         }
74     }
75 }

IMongoModel：

 1 using MongoDB.Bson;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.Text;
 5 
 6 namespace Mongodb
 7 {
 8     public partial class IMongoModel
 9     {
10         /// <summary>
11         /// 基础ID
12         /// </summary>
13         public ObjectId _id { get; set; }
14     }
15 }

值得注意的是：需引用MongoDB.BSon与MongoDB.Driver

VS2017若在引用包后，还是无法找到命名空间，重启VS即可。

ABCDEFG.GetAppSetting("mongodb"));读取配置文件