C# 操作 MongoDB
阿新 • • 發佈:2018-01-29
拼接 names com 條件 find amp base sin delet
今項目使用Mongodb,C#操作MongoDB使用MongoDB.Driver.dll庫(Nuget),寫了個小Demo,如下:
using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Text; using MongoDB.Driver; namespace MongoBase { internal class MongoBase { private static string _connStr = "mongodb://root:[email protected]:27017"; private static string _dbName = "test"; private static MongoUrl url = new MongoUrl(_connStr); private static MongoClient client = new MongoClient(url); public static IMongoDatabase db = client.GetDatabase(_dbName); } publicclass MongoHelper<TEntity> { public string Name => typeof(TEntity).Name; public IMongoCollection<TEntity> Collection => MongoBase.db.GetCollection<TEntity>(Name); public List<TEntity> Queryable => Collection.AsQueryable().ToList();public FilterDefinitionBuilder<TEntity> Filter => Builders<TEntity>.Filter; public UpdateDefinitionBuilder<TEntity> Update => Builders<TEntity>.Update; } }
using System; using System.Collections.Generic; using System.Text; using MongoDB.Bson; using MongoDB.Bson.Serialization.Attributes; namespace MongoBase { public class EntityBase { public EntityBase() { _id = ObjectId.GenerateNewId(); createTime = DateTime.Now; isDelete = false; id = _id.ToString(); } [BsonId] public ObjectId _id { get; set; } public string id { get; set; } public DateTime? createTime { get; set; } public bool? isDelete { get; set; } } }
using System; using System.Collections.Generic; using MongoBase; using MongoDB.Bson; using MongoDB.Driver; using MongoDB.Driver.Linq; namespace ConsoleApp5 { class Program { static void Main(string[] args) { MongoHelper<Video> videoHelper = new MongoHelper<Video>(); //新增 videoHelper.Collection.InsertOne(new Video() { Title="ggg" }); //查找集合 var list = videoHelper.Collection.Find(videoHelper.Filter.Eq(e => e.Category, "Horror")).ToList(); //方式一:拼接查找條件 List<FilterDefinition<Video>> listFilter = new List<FilterDefinition<Video>>() { videoHelper.Filter.Eq(e=>e.Minutes,118), videoHelper.Filter.Eq(e=>e.Title,"The Perfect Developer") }; //根據查找多個條件篩選集合 list = videoHelper.Collection.Find(videoHelper.Filter.And(listFilter)).ToList(); //方式二:拼接查找條件 var filter = videoHelper.Filter.Eq(e => e.Title, "cys") & videoHelper.Filter.Eq(e => e.Category, "cys"); list = videoHelper.Collection.Find(filter).ToList(); //拼接更新字段 var updateDefinition = new List<UpdateDefinition<Video>>() { videoHelper.Update.Set(e=>e.Title, "cys"), videoHelper.Update.Set(e=>e.Category, "cys") }; //按照條件更新 videoHelper.Collection.UpdateMany(videoHelper.Filter.And(listFilter), videoHelper.Update.Combine(updateDefinition)); //刪除 videoHelper.Collection.DeleteOne(videoHelper.Filter.Eq(e => e.Title, "Lost In Frankfurt am Main")); } } }
using MongoBase; using MongoDB.Bson; using MongoDB.Bson.Serialization.Attributes; namespace ConsoleApp5 { internal class Video : EntityBase { public string Title { get; set; } public string Category { get; set; } public int Minutes { get; set; } public string Comments { get; set; } } }
C# 操作 MongoDB