I'm developing a Blazor WASM project and I'm stuck in this point.
I'm using a DataAccess Service to make the requests to EndPoints;
The endpoints return a ResultList, that is a Generic Object that needs to be parsed in Client side. The object definition:
public class ResultList
{
public ResultList(List<object> resultados, string codigoErro = null, string mensagemErro = null)
{
this.Resultados = resultados;
this.CodigoErro = codigoErro;
this.MensagemErro = mensagemErro;
}
public string MensagemErro { get; set; }
public List<object> Resultados { get; set; }
public string CodigoErro { get; set; }
}
In the client side, I receive the same type:
public async Task<ResultList> GetEmpresas()
{
try
{
ResultList Result = await _httpClient.GetFromJsonAsync<ResultList>("api/EmpCadBasico/GetEmpresas");
return Result;
}
catch (Exception ex)
{
return new ResultList(null, null, ex.Message);
}
}
The problem is: I can't convert the List<Object> to other type like List<Empresa>.
The C# compilation doesn't notify bug, but in execution time, it happens.
I tried Serialize and Deserialize, and it doesn't work too:
public async Task GetEmpresas()
{
ResultList Resultado = await _dataAccess.GetEmpresas();
if (await RetornoOk(Resultado))
{
string x = JsonSerializer.Serialize(Resultado.Resultados); // Here, that's fine.
List<Empresa> y = JsonSerializer.Deserialize<List<Empresa>>(x); // Here, it finds the objects, but all of them with null values.
}
}
The X value: '[{"id":1,"nomeEmpresa":"Alamo","cnpj":"00072619000101","dataCadastro":"2020-01-01T00:00:00","colaborador":[],"marca":[]}]'
The Y value: Y value after Deserialization
According to the json return data you provided, I did the following restoration and successfully returned the data, you can refer to it.
Model:
public class TestModel
{
public int id { get; set; }
public string nomeEmpresa { get; set; }
public string cnpj { get; set; }
public string dataCadastro { get; set; }
public List<colaborador> colaborador { get; set; }
public List<marca> marca { get; set; }
}
public class colaborador
{
public int id { get; set; }
public string test { get; set; }
}
public class marca
{
public int id { get; set; }
public string test { get; set; }
}
Then I gave values to individual attributes, and the results are as follows：
Related
I get data from my database, but the swagger throws a 500 error.
This is my code - model of user
public class User
{
[Key]
public int Id { get; set; }
[Required]
[MaxLength(30)]
public string Pseudo { get; set; }
[EmailAddress]
public string Mail { get; set; }
[Required]
public string Pwd { get; set; }
[Required]
public bool IsAdmin { get; set; }
public ICollection<Project> UsersProjects { get; set; }
}
DAL code to interact with database:
public TEntity? GetById(params object[] Id)
{
return _Context.Set<TEntity>().Find(Id);
}
public ICollection<Project> GetProjectList(int id)
{
return _Context.projects
.Where(u => u.ProjectManager.Id == id)
.ToList();
}
BLL
public UserBLL GetUser(int id)
{
try
{
UserBLL user = _Repo.GetById(id).ToBLL();
user.UsersProjects = _Repo.GetProjectList(id);
return user;
}
catch
{
throw new Exception("Utilisateur introuvable");
}
}
Controller
public IActionResult GetUser(int id)
{
try
{
return Ok(_userService.GetUser(id));
}
catch (Exception ex)
{
return BadRequest(ex.Message);
}
}
ERROR
Error: response status is 500
When I run the code step by step my object is good nothing is empty so I don't know what is the problem with Swagger
Please help
Request:
namespace mediere_API.Requests
{
public class LocalitateRequest
{
public string Nume { get; set; }
public int JudetId { get; set; }
}
}
DTO
namespace mediere_API.Dtos
{
public class LocalitateDTO
{
public int Id { get; set; }
public string Nume { get; set; }
public JudetDTO Judet { get; set; }
}
}
Entity
using mediere_API.Dtos;
using System.ComponentModel.DataAnnotations;
namespace mediere_API.DataLayer.Entities
{
public class Localitate : BaseEntity
{
[Required]
public string Nume { get; set; }
[Required]
public int JudetId { get; set; }
public virtual Judet judet { get; set; }
public Localitate() { }
}
}
Processor method
async Task<ActionResult> ILocalitatiProcessor.AddLocalitate(LocalitateRequest localitateRequest)
{
var record = _mapper.Map<Localitate>(localitateRequest);
_unitOfWork.Localitati.Insert(record);
if (await _unitOfWork.SaveChangesAsync() == false)
{
return new BadRequestResult();
}
return new CreatedAtRouteResult("GetByIdLocalitate", new {Id = record.Id}, _mapper.Map<LocalitateDTO>(record));
}
So, I have these pieces of code.
The way I'm using my front-end, I need to have the navigation properties filled in when I get the response on the POST request.
Right now I get:
{
"id": 12777,
"nume": "test",
"judet": null
}
On the get requests it works properly, but with CreatedAtRouteResult it doesn't, and I know why, but I don't know how should I fix it.
Record doesn't have the navigation properties filled in because it is a mapping of localitateRequest (which doesn't have the navigation properties) to Localitate.
So, how should I approach this problem?
Thanks.
I want to use mapbox matching in ASP.NET Core. This link you can get response https://api.mapbox.com/matching/v5/mapbox/driving/..
I want to convert this response to dynamic json in Asp.net core, I use this line
var jsonResponse = JsonConvert.DeserializeObject(mapResponse);
but I get empty values. Any help?
Firstly, The API you have shared I got follwing response using
postman:
If its same what you are getting then I follow below steps to retrive
the value from the API response in C# asp.net core controller
Model You should have :
public class Admin
{
public string iso_3166_1_alpha3 { get; set; }
public string iso_3166_1 { get; set; }
}
public class Leg
{
public List<object> via_waypoints { get; set; }
public List<Admin> admins { get; set; }
public double weight { get; set; }
public double duration { get; set; }
public List<object> steps { get; set; }
public double distance { get; set; }
public string summary { get; set; }
}
public class Matching
{
public double confidence { get; set; }
public string weight_name { get; set; }
public double weight { get; set; }
public double duration { get; set; }
public double distance { get; set; }
public List<Leg> legs { get; set; }
public string geometry { get; set; }
}
public class Tracepoint
{
public int matchings_index { get; set; }
public int waypoint_index { get; set; }
public int alternatives_count { get; set; }
public double distance { get; set; }
public string name { get; set; }
public List<double> location { get; set; }
}
public class MapResponseClass
{
public List<Matching> matchings { get; set; }
public List<Tracepoint> tracepoints { get; set; }
public string code { get; set; }
public string uuid { get; set; }
}
Asp.net core Controller:
public async Task<IActionResult> CallMapAPI()
{
try
{
HttpClient client = new HttpClient();
HttpResponseMessage response = await client.GetAsync("https://api.mapbox.com/matching/v5/mapbox/driving/-117.17282,32.71204;-117.17288,32.71225;-117.17293,32.71244;-117.17292,32.71256;-117.17298,32.712603;-117.17314,32.71259;-117.17334,32.71254?access_token=pk.eyJ1Ijoibm92ZXJzbWFwIiwiYSI6ImNreTdwc3ppNTE3dzkyb3B2MnVzNXpueTUifQ.csYTL2GKkl99Yqk_TQjr5w");
response.EnsureSuccessStatusCode();
string mapAPIjson = await response.Content.ReadAsStringAsync();
var data = JsonConvert.DeserializeObject<MapResponseClass>(mapAPIjson);
}
catch (Exception ex)
{
throw;
}
return data;
}}
Output:
Note:
You should bound your class as per your API response. What I am
assuming of your empty values is you haven't converted the relevant
class accordingly. I hope above steps guided you accordingly.
I'm struggling with net core returning truncated response. I have already defined no reference loop in my startup services, and also tried to set compatibility version for the version i'm currently using 2.1 as follows:
services.AddMvc()
.SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
.AddJsonOptions(x => x.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore);
I also tried to serialize the array using JsonConvert and it did not throw any reference loop exception. Here's the action in the controller and the serializedArray text:
public IActionResult GetProductItems(int productId)
{
try
{
var productItems = _productsMethods.GetProductItems(productId);
// for testing the object for ref loops
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(productItems);
return Ok(productItems);
}
catch (ClientException ex)
{
return BadRequest(new { message = ex.Message });
}
catch (Exception ex)
{
return StatusCode(500, new { message = ex.Message });
}
}
// serialized string
//[{"ID":2,"ProductId":6,"ItemId":4,"Product":null,"Item":null,"Orders":[]},{"ID":3,"ProductId":":6,"ItemId":1,"Product":null,"Item":null,"Orders":[]},{"ID":5,"ProductId":":6,"ItemId":2,"Product":null,"Item":null,"Orders":[]}]
Here's the actual response
[{"id":2,"productId":6,"itemId":4,"product":null,"item":null,"orders":
Method:
public List<ProductItem> GetProductItems(int productId)
{
IQueryable<DataSets.ProductItem> query = db.ProductItems
.AsNoTracking()
.Include(k => k.Orders)
.Where(k => k.ProductId == productId);
// result truncated (when array orders is empty)
//return query.Select(_mapper.Map<ProductItem>).ToList();
// without automapper, also truncated
//return query.Select(k => new ProductItem()
//{
// ID = k.ID,
// ItemId = k.ItemId,
// ProductId = k.ProductId,
// Orders = k.Orders.Select(a => new Order() { ID = a.ID })
// .ToList()
//}).ToList();
// WORKS, not getting truncated
// order not included
return query.Select(k => new ProductItem()
{
ID = k.ID,
ItemId = k.ItemId,
ProductId = k.ProductId,
}).ToList();
}
Entities (renamed and removed props for simplification):
public class Product
{
public int ID { get; set; }
// some props
public string UserId { get; set; }
public User User { get; set; }
public List<ProductItem> Items { get; set; }
}
public class ProductItem
{
public int ID { get; set; }
// some props
public int ProductId { get; set; }
public int ItemId { get; set; }
public Product Product { get; set; }
public Item Item { get; set; }
public List<Order> Orders { get; set; }
}
public class Order
{
public int ID { get; set; }
// some props
public int ItemId { get; set; }
public ProductItemOrder Item { get; set; }
}
Since there is no reference loop in orders and also the reference loop is ignored. Why is this still truncating?
I think the problem is public Product Product { get; set; } part here. You should define your Product entity virtually.
Here is an example below,
public class Blog
{
public int BlogId { get; set; }
public string Name { get; set; }
public string Url { get; set; }
public string Tags { get; set; }
public virtual ICollection<Post> Posts { get; set; }
}
Here is source.
For someone who might have this issue in the future. While I think the API should throw that error instead of just truncating the response.
I had 2 properties with the same letters but different letter case IPAddress and IpAddress.
SerializeObject alone wasn't throwing an exception, then I did this (CamelCase Resolver) to point out the issue:
Newtonsoft.Json.JsonConvert.DefaultSettings = () => new Newtonsoft.Json.JsonSerializerSettings
{
NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore,
ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver()
};
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(productItems);
So it threw: A member with the name 'ipAddress' already exists on ...
I am new in MVC. I am working on a project where i have created a model class and also context class which is working good if i view the record in normal view.
but if i try to get the data in group by "Series_Name" and bind it into same model class it gives error. here is my code
Here is Model class and DBContextClass
[Table("tblvideo")]
public class TVSerial
{
[Key]
public Int64 Video_ID { get; set; }
public string Series_Name { get; set; }
public string Season_No { get; set; }
public string Episode_No { get; set; }
public string Episode_Name { get; set; }
public string Time_Duration { get; set; }
public string File_Url_480p { get; set; }
public string File_Url_720p { get; set; }
public string Description { get; set; }
public bool Is_Active { get; set; }
public string Image_Url_Small { get; set; }
public string Image_Url_Big { get; set; }
}
public class TvSerialContext : DbContext
{
public DbSet<TVSerial> TvSerials { get; set; }
}
Here is controller class:
public class TvSerialController : Controller
{
public ActionResult ListAllTvSerial()
{
try
{
TvSerialContext tvContext = new TvSerialContext();
List<TVSerial> tv = tvContext.TvSerials.ToList();
return View(tv);
}
catch (Exception ex)
{
return Content(ex.Message);
}
}
}
Above code works as expected, but if i am doing this :
public ActionResult ListAllSeason(string serial)
{
try
{
TvSerialContext tvContext = new TvSerialContext();
List<TVSerial> tv = tvContext.TvSerials.Where(tvs => tvs.Series_Name == serial).Distinct().ToList();
return View(tv);
}
catch (Exception ex)
{
return Content(ex.Message);
}
}
it return all rows , i just want single row from every series_name and custom field "Series_Name,Season_No,Image_Url_Big"
i don't know how to achieve this.
getting result :
Expected result:-
You could do this by creating a view model and using a .GroupBy() clause
public class TVSerialVM
{
public string SeriesName { get; set; }
public string SeasonNo { get; set; }
public string ImageUrl { get; set; }
}
and the query to project into your view model
List<TVSerialVM> model = tvContext.TvSerials.Where(t => t.Series_Name == serial)
.GroupBy(t => new { t.Series_Name, t.Season_No, t.Image_Url_Big })
.Select(t => new TVSerialVM
{
SeriesName = t.Key.Series_Name,
SeasonNo = t.Key.Season_No,
ImageUrl = t.Key.Image_Url_Big
}).ToList();
Side note: Your duplicating data in the database (the season number and the image url). You should consider moving the image urls to another table with a relationship to the season number.
The reason you are getting multiple values even though you are using distinct is the Distinct method does not know what "equal" is for TVSerial.
You can use Distinct with IEqualityComparer.
https://msdn.microsoft.com/en-us/library/vstudio/bb338049(v=vs.100).aspx
Distinct is not guaranteed to on custom objects it doesn't know what to compare. I have used this SO in the past to make my custom object work with Distinct.
Creating a distinct list of custom type in C#