.Net Core MongoDB 简单操作。
一：MongoDB 简单操作类。这里引用了MongoDB.Driver。
using MongoDB.Bson; using MongoDB.Driver; using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; namespace WebEFCodeFirst.MongoDBPro { public class MongoDBOperation<T> where T : class { private static MongoDBOperation<T> mongoDBOperation = null; private static readonly object lockobject = new object(); private MongoClient mongoClient { get; set; } private IMongoDatabase db { get; set; } private IMongoCollection<BsonDocument> collection { get; set; } private IEnumerable<BsonDocument> documents { get; set; } private MongoDBOperation() { mongoClient = new MongoClient("mongodb://localhost:27017"); db = mongoClient.GetDatabase("db"); collection = db.GetCollection<BsonDocument>("londb"); } public static MongoDBOperation<T> GetMongoDBInstance() { if (mongoDBOperation == null) { lock (nameof(MongoDBOperation<T>))// lockobject) { if (mongoDBOperation == null) { mongoDBOperation = new MongoDBOperation<T>(); } } } return mongoDBOperation; } /// <summary> /// 同步插入数据 /// </summary> /// <param name="document"></param> /// <returns></returns> public bool InsertOneData(BsonDocument document) { try { if (collection != null) { collection.InsertOne(document); return true; } else { return false; } } catch (Exception ex) { return false; } } /// <summary> /// 异步插入 /// </summary> /// <param name="document"></param> /// <returns></returns> public async Task<bool> InsertAsyncOneData(BsonDocument document) { try { if (collection != null) { await collection.InsertOneAsync(document); return true; } else { return false; } } catch (Exception ex) { return false; } } /// <summary> /// 同步插入多条数据 /// </summary> /// <param name="documents"></param> /// <returns></returns> public bool InsertManyData(IEnumerable<BsonDocument> documents) { try { //documents = Enumerable.Range(0, 100).Select(i => new BsonDocument("counter", i)); if (collection != null) { collection.InsertMany(documents); return true; } else { return false; } } catch (Exception ex) { return false; } } /// <summary> /// 同步插入多条数据 /// </summary> /// <param name="documents"></param> /// <returns></returns> public async Task<bool> InsertAsyncManyData(IEnumerable<BsonDocument> documents) { try { //documents = Enumerable.Range(0, 100).Select(i => new BsonDocument("counter", i)); if (collection != null) { await collection.InsertManyAsync(documents); return true; } else { return false; } } catch (Exception ex) { return false; } } /// <summary> /// 查找有数据。 /// </summary> /// <returns></returns> public List<BsonDocument> FindData() { return collection.Find(new BsonDocument()).ToList(); } /// <summary> /// 取排除_id字段以外的数据。然后转换成泛型。 /// </summary> /// <returns></returns> public List<BsonDocument> FindAnsyncData() { var projection = Builders<BsonDocument>.Projection.Exclude("_id"); var document = collection.Find(new BsonDocument()).Project(projection).ToListAsync().Result; return document; } /// <summary> /// 按某些列条件查询 /// </summary> /// <param name="bson"></param> /// <returns></returns> public List<BsonDocument> FindFilterlData(BsonDocument bson) { var buildfilter = Builders<BsonDocument>.Filter; FilterDefinition<BsonDocument> filter = null; foreach (var bs in bson) { filter = buildfilter.Eq(bs.Name, bs.Value); } //filter = buildfilter.Eq("name", "MongoDBTest"); var documents = collection.Find(filter).ToList(); return documents; } /// <summary> /// 返回受影响行 /// </summary> /// <returns></returns> public long DeleteData() { //删除count大于0的文档。 var filter = Builders<BsonDocument>.Filter.Gt("count",0); DeleteResult deleteResult = collection.DeleteMany(filter); return deleteResult.DeletedCount; } /// <summary> /// 根据id更新文档中单条数据。 /// </summary> /// <param name="_id"></param> /// <param name="bson"></param> public UpdateResult UpdateOneData(string _id,BsonDocument bson) { //修改条件（相当于sql where） FilterDefinition<BsonDocument> filter = Builders<BsonDocument>.Filter.Eq("name", "MongoDB"); UpdateDefinition<BsonDocument> update = null; foreach (var bs in bson) { if (bs.Name.Equals("name")) { update = Builders<BsonDocument>.Update.Set(bs.Name, bs.Value); } } //UpdateDefinition<BsonDocument> update = Builders<BsonDocument>.Update.Set("name", bson[0].ToString()); UpdateResult result = collection.UpdateOne(filter, update);//默认更新第一条。 return result; } } }
二：控制器类
using System.Collections.Generic; using System.Threading.Tasks; using Microsoft.AspNetCore.Mvc; using MongoDB.Bson; using WebEFCodeFirst.Models; using WebEFCodeFirst.MongoDBPro; namespace WebEFCodeFirst.Controllers { public class MongoDBController : Controller { private MongoDBOperation<BsonDocument> mongo = null; public MongoDBController() { mongo = MongoDBOperation<BsonDocument>.GetMongoDBInstance(); } public ActionResult Index() { var document = new BsonDocument { { "name", "MongoDB" }, { "type", "Nosql" }, { "count", 2 }, }; List<MongodbModel> mdlist = new List<MongodbModel>(); //MongodbModel model = new MongodbModel(); if (mongo != null) { //long result = mongo.DeleteData();//删除 //mongo.InsertOneData(document);//插入一行数据 List<BsonDocument> document1 = mongo.FindAnsyncData(); //List<BsonDocument> list = mongo.FindData(); //mongo.UpdateOneData(list[0]["_id"].ToString(), document); //BsonDocument 支持索引查询。 ViewData["name"] = document1[0]["name"].ToString(); ViewData["type"] = document1[1]["type"].ToString(); ViewBag.Name = document1[0]["name"].ToString(); ViewBag.Type = document1[1]["type"].ToString(); for (int i = 0; i < document1.Count; i++) { MongodbModel model = new MongodbModel(); model.name = document1[i]["name"].ToString(); model.type1 = document1[i]["type"].ToString(); model.count = document1[i]["count"].ToString(); mdlist.Add(model); } } //return PartialView("/*_MongoDBPartial*/", mdlist); return View(mdlist); } public IActionResult querymongodb(string dbname)//[FromBody] object paras)// string[] arr) { //if (arr.Length <= 0) //{ // return null; //} dbname = Request.Query["dbname"].ToString();// Get请求 //dbname = Request.Form["dbname"].ToString();//POST请求 if (string.IsNullOrEmpty(dbname.ToString())) { return null; } var document = new BsonDocument { { "name", dbname.ToString() }, { "type", "DB"}, }; List<MongodbModel> mdlist = new List<MongodbModel>(); if (mongo != null) { List<BsonDocument> document1 = mongo.FindFilterlData(document); for (int i = 0; i < document1.Count; i++) { MongodbModel model = new MongodbModel(); model.name = document1[i]["name"].ToString(); model.type1 = document1[i]["type"].ToString(); model.count = document1[i]["count"].ToString(); mdlist.Add(model); } } return PartialView("_MongoDBPartial", mdlist); //return View(mdlist); } [HttpPost] public IActionResult querymon(string dbname) { dbname = Request.Form["dbname"].ToString(); var document = new BsonDocument { { "name", dbname }, { "type", dbname}, }; List<MongodbModel> mdlist = new List<MongodbModel>(); if (mongo != null) { List<BsonDocument> document1 = mongo.FindFilterlData(document); for (int i = 0; i < document1.Count; i++) { MongodbModel model = new MongodbModel(); model.name = document1[i]["name"].ToString(); model.type1 = document1[i]["type"].ToString(); model.count = document1[i]["count"].ToString(); mdlist.Add(model); } } return PartialView("_MongoDBPartial", mdlist); //return View(mdlist); } [HttpPost] public IActionResult OnPostSearchquerymon(string dbname2) { if (string.IsNullOrEmpty(dbname2)) { return null; } var document = new BsonDocument { { "name", dbname2 }, { "type", "DB"}, }; List<MongodbModel> mdlist = new List<MongodbModel>(); if (mongo != null) { List<BsonDocument> document1 = mongo.FindFilterlData(document); for (int i = 0; i < document1.Count; i++) { MongodbModel model = new MongodbModel(); model.name = document1[i]["name"].ToString(); model.type1 = document1[i]["type"].ToString(); model.count = document1[i]["count"].ToString(); mdlist.Add(model); } } return View(mdlist); } public IActionResult Create() { return View(); } [HttpPost] public async Task<IActionResult> Create(string dbname) { dbname = Request.Form["dbname"].ToString(); string dbtye = Request.Form["dbtye"].ToString(); string dbcount = Request.Form["dbcount"].ToString(); if (string.IsNullOrEmpty(dbname)) { return RedirectToAction(nameof(Index)); } var document = new BsonDocument { { "name", dbname }, { "type", dbtye}, { "count",dbcount}, }; if (mongo != null) { await mongo.InsertAsyncOneData(document); } return RedirectToAction(nameof(Index)); } } }
三：视图
@model IEnumerable<WebEFCodeFirst.Models.MongodbModel> <style> th, td { padding: 3px; } </style> <script src="~/lib/jquery/dist/jquery.min.js"></script> <script src="~/lib/jquery/dist/jquery.js"></script> <p> <h3> <a asp-action="Create">注册</a> </h3> </p> <div class="row"> <p></p> <div class="col-md-12"> <form action="post"> <div class="row-fluid"> 名称:<input type="text" id="dbname" name="dbname2" value=@ViewBag.Name /> 类型:<input type="text" id="dbtype" value=@ViewBag.Name /> <input type="button" asp-controller="MongoDB" asp-action="querymon" id="mongodbtest" value="查询" /> <input type="button" asp-page-handler="Searchquerymon" id="mongodbte" value="查询handler" /> <input type="submit" id="sbquery" value="查询sub" /> </div> <div class="table table-striped" id="datamain"> @Html.Partial("/Views/Shared/_MongoDBPartial.cshtml", Model)@*页面load时候。*@ </div> </form> <p></p> <ul id="messages" style="list-style-type:none;"></ul> </div> </div> <script> //新增数据。2018.3.23 14:38 // Ajax Get方法。 $(document).ready(function () { $("#mongodbte").click(function () { var txtNo1 = $("#dbname").val(); var txtName1 = $("#dbtype").val(); var model = []; model.push($("#dbname").val(), $("#dbtype").val()); $.ajax({ url: "/MongoDB/querymongodb",//规定发送请求的 URL。默认是当前页面 data: { dbname: model.toString() }, //json时，一定要是key-value.规定要发送到服务器的数据 type: "GET",//规定请求的类型（GET 或 POST）。 contentType: "json",//"application/json;charset=utf-8",//数据类型必须有，指定发给服务端的数据格式。 async: true,//异步处理 success: function (datas) { $("#datamain").html(datas); //console.log(datas); }, error: function (datas) { alert("刷新失败！"); } });//ajax（）方法要放在事件中调用。 }); }); //Ajax Post方法 2018.3.24 14:12 $(document).ready(function () { $("#mongodbtest").click(function () { var txtNo1 = $("#dbname").val(); var txtName1 = $("#dbtype").val(); var model = []; model.push($("#dbname").val(), $("#dbtype").val()); $.ajax({ url: "/MongoDB/querymon",//规定发送请求的 URL。默认是当前页面 data: { dbname: txtNo1, dbtye: txtName1 }, //json时，一定要是key-value.规定要发送到服务器的数据 type: "POST",//规定请求的类型（GET 或 POST）。 contentType: "application/x-www-form-urlencoded",//Post用这种类型,//数据类型必须有，指定发给服务端的数据格式。 async: true,//异步处理 success: function (datas) { $("#datamain").html(datas); //console.log(datas); .net core 自带log4 }, error: function (datas) { alert("刷新失败！"); } });//ajax（）方法要放在事件中调用。 }); }); </script>
四：效果图
附加：
默认情况下控制器和视图关系：
