C# / .Net Core 访问MongoDb库

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：

 using ABCDEFG.Config;
 using MongoDB.Driver;
 using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
 using System.Text;

 namespace Mongodb
 {
     public class MongoContext
     {
         public MongoContext()
         {
             Client = new MongoClient(ABCDEFG.GetAppSetting("mongodb"));
         }

         public MongoContext(string connectionName)
         {
             Client = new MongoClient(MengTConfig.GetAppSetting(connectionName));
         }

         private MongoClient Client { get; set; }

         private IMongoDatabase DataBase { get => Client.GetDatabase("MengTLog"); }

         public IMongoCollection<T> DbSet<T>() where T : IMongoModel => DataBase.GetCollection<T>("MengTLog.Logger");

     }

     public static class MongoExtend
     {
         public static void Add<T>(this IMongoCollection<T> collenction, T Model) where T : IMongoModel
                   => collenction.InsertOne(Model);

         public static void AddList<T>(this IMongoCollection<T> collenction, List<T> Model) where T : IMongoModel
                  => collenction.InsertMany(Model);

         /// <summary>
         /// 查找第一个
         /// </summary>
         public static T FirstOrDefault<T>(this IMongoCollection<T> collenction,Expression<Func<T, bool>> expression) where T : IMongoModel
         {
             if (expression == null) { throw new ArgumentNullException("参数无效"); }
             return collenction.Find(expression).FirstOrDefault();
         }

         /// <summary>
         /// 查找符合数据列表
         /// </summary>
         public static List<T> FindToList<T>(this IMongoCollection<T> collenction, Expression<Func<T, bool>> expression) where T : IMongoModel
         {
             if (expression == null) { throw new ArgumentNullException("参数无效"); }
             return collenction.Find(expression).ToList();
         }

         /// <summary>
         /// 删除全部匹配数据
         /// </summary>
         public static void Delete<T>(this IMongoCollection<T> collenction, Expression<Func<T, bool>> expression) where T : IMongoModel
         {
             if (expression == null) { throw new ArgumentNullException("参数无效"); }
             collenction.DeleteManyAsync(expression);
         }

         /// <summary>
         /// 删除一个
         /// </summary>
         public static void DeleteOne<T>(this IMongoCollection<T> collenction, Expression<Func<T, bool>> expression) where T : IMongoModel
         {
             if (expression == null) { throw new ArgumentNullException("参数无效"); }
             collenction.DeleteOneAsync(expression);
         }
     }
 }

IMongoModel：

 using MongoDB.Bson;
 using System;
 using System.Collections.Generic;
 using System.Text;

 namespace Mongodb
 {
     public partial class IMongoModel
     {
         /// <summary>
         /// 基础ID
         /// </summary>
         public ObjectId _id { get; set; }
     }
 }

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