MongoDB 學習筆記四 C#調用MongoDB

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驅動

• 下載 
  https://github.com/mongodb/mongo-csharp-driver/downloads

• 項目地址： 
  https://github.com/mongodb/mongo-csharp-driver

• 1.10 使用參考： 
  http://mongodb.github.io/mongo-csharp-driver/1.10/

• 1.10 API 
  http://api.mongodb.org/csharp/1.10/

  官方推薦使用Nuget進行安裝。但我搜尋時出來東西太多了，分不清，故直接下載。 
  要注意的是，2.0 和1.10支援的環境不同。

C#/.NET Driver Version	MongoDB 2.4	MongoDB 2.6	MongoDB 3.0
Version 2.0	?	?	?
Version 1.10	?	?	?

Driver Version	.NET 3.5	.NET 4.0	.NET 4.5	Mono 2.10	Mono 3.x
Version 2.0			?		?
Version 1.10	?	?	?	?	?

我這裡下載1.10版本，framework 4.0環境。

使用串連

using MongoDB.Bson;using MongoDB.Driver;var client = new MongoClient("mongodb://localhost:27017");var server = client.GetServer();var database = server.GetDatabase("foo");var collection = database.GetCollection<BsonDocument>("bar");await collection.InsertOneAsync(new BsonDocument("Name", "Jack"));var list = await collection.Find(new BsonDocument("Name", "Jack"))    .ToListAsync();foreach(var document in list){    Console.WriteLine(document["Name"]);}

Document是實體類

using MongoDB.Bson;using MongoDB.Driver;public class Person{    public ObjectId Id { get; set; }    public string Name { get; set; }}var client = new MongoClient("mongodb://localhost:27017");var server = client.GetServer();var database = server.GetDatabase("foo");var collection = database.GetCollection<Person>("bar");await collection.InsertOneAsync(new Person { Name = "Jack" });var list = await collection.Find(x => x.Name == "Jack")    .ToListAsync();foreach(var person in list){    Console.WriteLine(person.Name);}

實體類給下面的代碼使用

public class Entity{    public ObjectId Id { get; set; }    public string Name { get; set; }}

 

插入

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)

尋找

var query = Query<Entity>.EQ(e => e.Id, id);var entity = collection.FindOne(query);// var entity = collection.FindOneByIdAs<Entity>(id);/* 定義一個查詢：查詢stdid=1的文檔FindOneArgs args = new FindOneArgs {    Query = Query.EQ("stdid", 1),//查詢stdid field等於1的document。};//查詢var std = collection.FindOneAs<Student>(args);*//* 查詢多條 IMongoQuery query = Query.GTE("stdid",2); var result=collection.FindAs<Student>(Query.GTE("stdid",2)); foreach (var each in result) {     Console.WriteLine(each.stdName); }*/

 

儲存

entity.Name = "Dick";collection.Save(entity);

更新

var query = Query<Entity>.EQ(e => e.Id, id);var update = Update<Entity>.Set(e => e.Name, "Harry"); // update modifierscollection.Update(query, update);

 

刪除

var query = Query<Entity>.EQ(e => e.Id, id);collection.Remove(query);

 

這是一個完整的樣本：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using MongoDB.Bson;using MongoDB.Driver;using MongoDB.Driver.Builders;namespace ConsoleApplication1{    public class Entity    {        public ObjectId Id { get; set; }        public string Name { get; set; }    }    class Program    {        static void Main(string[] args)        {            var connectionString = "mongodb://localhost";            var client = new MongoClient(connectionString);            var server = client.GetServer();            var database = server.GetDatabase("test");            var collection = database.GetCollection<Entity>("entities");            var entity = new Entity { Name = "Tom" };            collection.Insert(entity);            var id = entity.Id;            var query = Query<Entity>.EQ(e => e.Id, id);            entity = collection.FindOne(query);            entity.Name = "Dick";            collection.Save(entity);            var update = Update<Entity>.Set(e => e.Name, "Harry");            collection.Update(query, update);            collection.Remove(query);        }    }}

 

參考：http://mongodb.github.io/mongo-csharp-driver/1.10/getting_started/

LinQ查詢

C# driver 1.8版本開始支援Linq查詢。

var linquery = from e in collection.AsQueryable<SY.Model.User>()                       //where e.age> 22                       select e;linquery=linquery.Where(c=>c.Name=="張三");int count=linquery.Count();

 

參考：http://mongodb.github.io/mongo-csharp-driver/1.10/linq/

Document查詢方式

未測試，參考地址記錄在這裡。

//Document docName = new Document { { "欄位名1", "輸入值1" }, { "欄位名2", "輸入值2" } };/// <summary>/// 根據姓名擷取使用者資訊/// </summary>/// <param name="mUserInfo">使用者Model類</param>/// <returns>使用者泛型集合</returns>public List<UserInfo> GetUserByName(UserInfo mUserInfo){    List<UserInfo> lsUser = new List<UserInfo>();    using (Mongo mongo = new Mongo("mongodb://localhost"))    {        MongoDatabase mongoDatabase = mongo.GetDatabase("UserInfo") as MongoDatabase;        MongoCollection<Document> mongoCollection = mongoDatabase.GetCollection<Document>("myCollection") as MongoCollection<Document>;        mongo.Connect();        Document docName = new Document { { "FirstName", "aaa" }, { "LastName", "bbb" } };        MongoDB.ICursor<Document> users = mongoCollection.Find(docName);        foreach (Document user in users.Documents)        {            UserInfo mUser = new UserInfo();            mUser.FirstName = user["FirstName"].ToString();            mUser.LastName = user["LastName"].ToString();            mUser.CorporationName = user["CorporationName"].ToString();            mUser.Phone = user["Phone"].ToString();            mUser.Email = user["Email"].ToString();            mUser.UserType = user["UserType"].ToString();            lsUser.Add(mUser);        }    }    return lsUser;}

 

http://weishangxue.blog.163.com/blog/static/21575188201181633811102/ 
http://mikaelkoskinen.net/post/mongodb-aggregation-framework-examples-in-c

MongoDB 學習筆記四 C#調用MongoDB