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MongoDB-Getting Started with the C# Driver

2024-07-25 15:34:19   218人阅读

简介：本文仅提供快速入门级别的使用C# Driver操作MongoDB，高手跳过

  1. Downloading the C# Driver
    1. 猛击下载
  2. 添加相关的dll引用
        MongoDB.Bson.dll    MongoDB.Driver.dll
  3. 添加名称空间引用
    using MongoDB.Bson;using MongoDB.Driver;
  4. 获取客户端对象
    var connectionString = "mongodb://localhost";var client = new MongoClient(connectionString);
  5. 获取服务端对象
    var server = client.GetServer();
  6. 获取要操作的数据库
    var database = server.GetDatabase("test"); // "test" is the name of the database
  7. CRUD(使用自定义的类)
    1. 自定义实体
      public class Entity{    public ObjectId Id { get; set; }    public string Name { get; set; }}
    2. 获取要操作的表
      // "entities" is the name of the collectionvar collection = database.GetCollection<Entity>("entities");
    3. 新增一条记录
      var entity = new Entity { Name = "Tom" };collection.Insert(entity);var id = entity.Id; // Insert will set the Id if necessary (as it was in this example)
    4. 查询一条记录
      var query = Query<Entity>.EQ(e => e.Id, id);var entity = collection.FindOne(query);
    5. 保存一条记录（发送整个实体到数据库）
      entity.Name = "Dick";collection.Save(entity);
    6. 修改一条记录（仅发送修改的部分到数据库，这一点是和保存还是有区别的，根据场景来自行判断需要用哪一种来更新数据）
      var query = Query<Entity>.EQ(e => e.Id, id);var update = Update<Entity>.Set(e => e.Name, "Harry"); // update modifierscollection.Update(query, update);
    7. 删除一条记录
      var query = Query<Entity>.EQ(e => e.Id, id);collection.Remove(query);

       

完整演示代码：

 1 using MongoDB.Bson; 2 using MongoDB.Driver; 3 using MongoDB.Driver.Builders; 4 using System; 5 using System.Collections.Generic; 6 using System.Linq; 7 using System.Linq.Expressions; 8 using System.Text; 9 using System.Threading.Tasks;10 11 namespace MongoDBTest12 {13     class Program14     {15         static void Main(string[] args)16         {17             var connectionString = "mongodb://localhost:27017";18             var client = new MongoClient(connectionString);19             var server = client.GetServer();20             var database = server.GetDatabase("test");21             var collection = database.GetCollection<Entity>("entities");22             var entity = new Entity { Name = "Tom" };23             var i = collection.Insert(entity);24             var id = entity.Id;25 26             var query = Query<Entity>.EQ(e => e.Id, id);27             entity = collection.FindOne(query);28             entity.Name = "Dick";29             var s = collection.Save(entity);30 31             var update = Update<Entity>.Set(e => e.Name, "Harry");32             collection.Update(query, update);33 34 35             collection.Remove(query);36 37             Console.ReadKey();38 39         }40 41 42     }43     public class Entity44     {45         public ObjectId Id;46         public string Name { get; set; }47     }48 49 }

 

MongoDB-Getting Started with the C# Driver


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