.Net 使用 MongoDB

黑泽明Coding2024-06-14 13:57

安装nuget包

MongoDB.Driver

简单代码

csharp 复制代码

using MongoDB.Bson;
using MongoDB.Driver;
using System.Buffers;
using System.Collections.Concurrent;
using System.Diagnostics;

namespace ConsoleApp4
{
    internal class Program
    {

      
        static void Main(string[] args)
        {
           var client = new MongoClient("mongodb://192.168.11.137");
           var database = client.GetDatabase("MyTestDB");
            var collection = database.GetCollection<UserInfo>("UserInfo");
            collection.InsertOne(new UserInfo
            {
                Name = "Jack",
                CreateTime = DateTime.Now,
            });

            var query = collection.Find(m => m.Name.Contains("Ja")).SortByDescending(m=>m.Name).ThenBy(m=>m.CreateTime).Skip(0).Limit(20).ToListAsync();
        }

     
    }

    class UserInfo
    {
        public ObjectId Id { get; set; }
        public string Name { get; set; }
        public DateTime CreateTime { get; set; }
    }
}

public ObjectId Id { get; set; } 必须要在model类中定义，否则查询会报错

UpdateOne

csharp 复制代码

var database = client.GetDatabase("MyTestDB2");
            var collection = database.GetCollection<UserInfo>("UserInfo");

            var data = collection.Find(m => true).FirstOrDefault();
            data.Balance = 0;

            var update = Builders<UserInfo>.Update.Set(m=>m.Balance, data.Balance);
            foreach (BsonElement item in data.ToBsonDocument())
            {
                update = update.Set(item.Name, item.Value);
            }

            collection.UpdateOne(m => true, update);

为集合创建索引

csharp 复制代码

   			var database = client.GetDatabase("MyTestDB");
            var collection = database.GetCollection<UserInfo>("UserInfo");
            collection.Indexes.CreateOne( Builders<UserInfo>.IndexKeys.Hashed(m=>m.Id)); //设置Id为哈希类型，并建立索引，哈希类型是否以后分片集群做准备的