C #/. Net Core access the MongoDb database,

C #/. Net Core access the MongoDb database,

Let's talk about Code directly.

Connection string:

{"Etettings": {"mongodb": "mongodb: // username: password @ IP Address: Port Number "}}

Subject code:

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 extends context11 {12 public encryption context () 13 {14 Client = new Consumer Client (ABCDEFG .. getdeleetting ("mongodb"); 15} 16 17 public encryption context (string connectionName) 18 {19 Client = new Login Client (MengTConfig. getAppSetting (connectionName); 20} 21 22 private login 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 extends extend31 {32 public static void Add <T> (this IMongoCollection <T> collenction, T Model) where T: IMongoModel33 => collenction. insertOne (Model); 34 35 public static void AddList <T> (this IMongoCollection <T> collenction, List <T> Model) where T: IMongoModel36 => collenction. insertmodel (Model ); 37 38 // <summary> 39 // find the first 40 /// </summary> 41 public static T FirstOrDefault <T> (this IMongoCollection <T> collenction, expression <Func <T, bool> expression) where T: IMongoModel42 {43 if (expression = null) {throw new ArgumentNullException ("invalid parameter");} 44 return collenction. find (expression ). firstOrDefault (); 45} 46 47 // <summary> 48 // find the compliant data List 49 // </summary> 50 public static List <T> FindToList <T> (this IMongoCollection <T> collenction, expression <Func <T, bool> expression) where T: IMongoModel51 {52 if (expression = null) {throw new ArgumentNullException ("invalid parameter");} 53 return collenction. find (expression ). toList (); 54} 55 56 // <summary> 57 // Delete all matched data 58 // </summary> 59 public static void Delete <T> (this IMongoCollection <T> collenction, expression <Func <T, bool> expression) where T: IMongoModel60 {61 if (expression = null) {throw new ArgumentNullException ("invalid parameter");} 62 collenction. deleteManyAsync (expression ); 63} 64 65 66 // <summary> 67 // delete a 68 // </summary> 69 public static void DeleteOne <T> (this IMongoCollection <T> collenction, expression <Func <T, bool> expression) where T: IMongoModel70 {71 if (expression = null) {throw new ArgumentNullException ("invalid parameter");} 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 // basic ID12 /// </summary> 13 public ObjectId _ id {get; set ;}14} 15}

It is worth noting that MongoDB. BSon and MongoDB. Driver must be referenced.

If the namespace still cannot be found after the package is referenced in vs7 7, restart.

ABCDEFG. getdeleetting ("mongodb"); read the configuration file