如何使用Web api asp .net用bson id过滤从mongodb中获取数据？

Question

I would like prepare Employee Detail page with asp.net web api. And I wanted to take data from mongodb and filter it according to id. But 'null' value appearing on the page. What can I do for fixing the problem? Can you give me an idea? Thank you in advance.

My Employee Detail page is

 using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Net.Http; using System.Web.Http; using MongoDB.Driver; using MongoDB.Bson; using TESTMONGO_C.Models; using System.Configuration; namespace TESTMONGO_C.Controllers { public class EmployeeDetailDataController : ApiController { [HttpGet] public object GetEmployeeById(string id) { string constr = ConfigurationManager.AppSettings["connectionString"]; var Client = new MongoClient(constr); var DB = Client.GetDatabase("test"); var collection = db.GetCollection<EmployeeDetail>("employee").Find(new BsonDocument("_id",ObjectId.Parse(id))).ToList(); return Json(collection); } } } 

My EmployeeDetail model is

 using MongoDB.Bson; using MongoDB.Bson.Serialization.Attributes; using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace TESTMONGO_C.Models { public class EmployeeDetail { [BsonRepresentation(BsonType.ObjectId)] public string id { get; set; } public string name { get; set; } public string department { get; set; } public string address { get; set; } public string city { get; set; } public string country { get; set; } } } 

Answer 1

Try following:

    [HttpGet]
    public object GetEmployeeById(string id)
    {
        string constr = ConfigurationManager.AppSettings["connectionString"];
        var Client = new MongoClient(constr);
        var DB = Client.GetDatabase("test");
        var collection = DB.GetCollection<EmployeeDetail>("employee");
        return Json(collection.Find(new BsonDocument("id", id)).ToList());
    }