I have created one WCF Data Service with simple entity as below.
namespace DataService
{
using System;
using System.Collections.Generic;
public partial class MemoryPackageData
{
public long c1 { get; set; }
public long c2 { get; set; }
public long c3 { get; set; }
public long c4 { get; set; }
}
}
namespace DataService
{
public class WCFDataService : DataService<DBEntities>
{
// This method is called only once to initialize service-wide policies.
public static void InitializeService(DataServiceConfiguration config)
{
// TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.
// Examples:
config.SetEntitySetAccessRule("MemoryPackageDatas", EntitySetRights.All);
config.SetServiceOperationAccessRule("InsertEntityData", ServiceOperationRights.All);
config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3;
}
//[WebInvoke(UriTemplate = "InsertEntityData/?package_id={package_id}&package_size={package_size}")]
[WebInvoke(UriTemplate = "InsertEntityData?package_id={package_id}")]
public void InsertEntityData(Int64 package_id, Int64 package_Size = 10)
{
// some stuff
}
Now, when I run this service in firefox and pass one parameter which is mandatory in the URL.
I have tried many different ways to call this method here. But not sure how to deal with these parameters list.
Method is inserting data to table.
Can any one please guide me here?
Thank you,
Mittal.
WebInvoke considers Method="POST" by default.
So you can use either WebGet attribute or specify Method="GET"
In browser, the default method is "Get". That's why the service will return 405.
You can use Fiddler to compose a Request with "Post" and try.
Related
I have this API
public ActionResult AddDocument([FromBody]AddDocumentRequestModel documentRequestModel)
{
AddDocumentStatus documentState = _documentService.AddDocument(documentRequestModel, DocumentType.OutgoingPosShipment);
if (documentState.IsSuccess)
return Ok();
return BadRequest();
}
And this is my request model
public class AddDocumentRequestModel
{
public AddDocumentRequestModel(int partnerId, List<ProductRequestModel> products)
{
PartnerId = partnerId;
Products = products;
}
[Range(1, int.MaxValue, ErrorMessage = "Value for {0} must be between {1} and {2}.")]
public int PartnerId { get; private set; }
[Required, MustHaveOneElement(ErrorMessage = "At least one product is required")]
public List<ProductRequestModel> Products { get; private set; }
}
so when I'm trying to hit the API with this body
{
"partnerId": 101,
"products": [{
"productId": 100,
"unitOfMeasureId": 102,
"quantity":5
}
]
}
this is the request : System.NotSupportedException: Deserialization of reference types without parameterless constructor is not supported. Type 'Alati.Commerce.Sync.Api.Controllers.AddDocumentRequestModel'
I don't need parameterless constructor,because it doesn't read the body parameters.Is there any other way for deserialization?
You can achieve your desired result. You need to switch to NewtonsoftJson serialization (from package Microsoft.AspNetCore.Mvc.NewtonsoftJson)
Call this in Startup.cs in the ConfigureServices method:
services.AddControllers().AddNewtonsoftJson();
After this, your constructor will be called by deserialization.
Extra info: I am using ASP Net Core 3.1
Later Edit: I wanted to give more info on this, as it seems that this can also be achieved by using System.Text.Json, although custom implementation is necessary. The answer from jawa states that Deserializing to immutable classes and structs can be achieved with System.Text.Json, by creating a custom converter (inherit from JsonConverter) and registering it to the converters collection (JsonSerializerOptions.Converters) like so:
public class ImmutablePointConverter : JsonConverter<ImmutablePoint>
{
...
}
and then...
var serializeOptions = new JsonSerializerOptions();
serializeOptions.Converters.Add(new ImmutablePointConverter());
serializeOptions.WriteIndented = true;
Just in case someone have the same issue I had, I was using abstract class, once removed the abstract key word, it all worked just fine.
Just Add [JsonConstructor] before your constructor
like this
public class Person
{
public string Name { get; set; }
public int LuckyNumber { get; private set; }
[JsonConstructor]
public Person(int luckyNumber)
{
LuckyNumber = luckyNumber;
}
public Person() { }
}
There are still some limitations using System.Text.Json - have a look here: https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-migrate-from-newtonsoft-how-to#table-of-differences-between-newtonsoftjson-and-systemtextjson
Deserialization without parameterless constructor using a parameterized constructor is not supported yet (but it's on their plan). You can implement your custom JsonConverter (like in this example: https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-migrate-from-newtonsoft-how-to#deserialize-to-immutable-classes-and-structs) or - like Adrian Nasul above suggested: use Newtonsoft.Json and then you can use the [JsonConstructor] attribute
In my case I had set a class as internal and when I made it public it worked. The error message was really of little help with this specific circumstance.
Old (actual class name changed to ClassName in the example
internal class Rootobject
{
[JsonConstructor]
public Rootobject(ClassName className)
{
ClassName = className?? throw new ArgumentNullException(nameof(className));
}
public ClassName ClassName { get; set; }
}
New:
public class Rootobject
{
[JsonConstructor]
public Rootobject(ClassName className)
{
ClassName = branding ?? throw new ArgumentNullException(nameof(className));
}
public ClassName ClassName { get; set; }
}
In my case error, caused was inside InnerException. There is my class had a field with a custom class type that did not have a parameterless constructor. I've added a parameterless constructor to the inner class and the problem has gone away.
My first time using .net core.
I was able to build a functioning ,net core web application that calls data from my SQL server using Onion Layers. My layout is as below:
Architecture
Core
Application Services
Domain Services
Core.Entity
Infrastructure
UI
API
CemeteryAPI
Web
MVC Web Application
My HomeController has a PageModel with a Complex Type of Search, which consists of about 5 or so ints another 5-6 Lists. In the past I would have done:
var model = new Models.HomePageModel
{
Search = new Business.Search()
};
public partial class Search
{
public String Surname { get; set; }
public String Forename { get; set; }
public String Initials { get; set; }
//etc.
}
I have registered my Services on my startup in ConfigureServices and have attempted to inject this way
Startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddScoped<ICemeteryRepository, CemeteryRepository>();
services.AddScoped<ICountryRepository, CountryRepository>();
//etc
services.AddScoped<ICemeteryService, CemeteryService>();
services.AddScoped<ICountryService, CountryService>();
}
CemeteryService
//ApplicationService
public class CemeteryService : AbstractUnitOfWorkService, ICemeteryService
{
public CemeteryService(IUnitOfWork uow) : base(uow) { }
public int Count()
{
return _unitOfWork.CemeteryRepository.Count();
}
public Cemetery Get(int id)
{
return _unitOfWork.CemeteryRepository.Get(id);
}
public List<Cemetery> List()
{
return _unitOfWork.CemeteryRepository.GetAll().ToList();
}
}
ICemeterRepository
//DomainService
public interface ICemeteryRepository : IRepository<Cemetery>
{
}
CemeteryRepository
public class CemeteryRepository : BaseRepository, ICemeteryRepository
{
public CemeteryRepository(SAWGPDBContext context) : base(context) { }
public int Count()
{
return _context.Cemetery.Count();
}
public Cemetery Get(int id)
{
return _context.Cemetery.Find(id);
}
public IEnumerable<Cemetery> GetAll()
{
return _context.Cemetery;
}
//etc
}
ICemeteryInterface
public interface ICemeteryService
{
int Count();
List<Cemetery> List();
//etc
}
public ActionResult Index([FromServices] ICasualtyService _CasualtyService, IPhotoService _PhotoService, ICountryService _CountryService, ICemeteryService _CemeteryService, IRegimentService _RegimentService)
var model = new Models.HomePageModel
{
Search = new SearchPageModel(_PhotoService, _CasualtyService, _CountryService, _CemeteryService, _RegimentService, )
};
This looked wrong but I couldn't find any proper examples as I wasn't sure what to look for exactly. The above returns
Model bound complex types must not be abstract or value types and must
have a parameterless constructor.
I presume I need to build a SearchService but I'm not entirely clear how to build one for a complex type. Any pointers would be appreciated.
We have a problem concerning Entity Framework objects and sending them through WCF.
We have a database, and Entity Framework created classes from that database, a 'Wallet' class in this particular situation.
We try to transfer a Wallet using this code:
public Wallet getWallet()
{
Wallet w = new Wallet();
w.name = "myname";
w.walletID = 123;
return w;
}
We need to transfer that Wallet class, but it won't work, we always encounter the same exception:
"An error occurred while receiving the HTTP response to localhost:8860/ComplementaryCoins.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details."
We searched on the internet, and there is a possibility that the error is due to the need of serialization of Entity Framework-objects.
We have absolutely no idea if this could be the case, and if this is the case, how to solve it.
Our DataContract looks like this (very simple):
[DataContract]
public partial class Wallet
{
[DataMember]
public int getwalletID { get { return walletID; } }
[DataMember]
public string getname { get { return name; } }
}
Does anyone ever encountered this problem?
EDIT: Our Entity Framework created class looks like this:
namespace ComplementaryCoins
{
using System;
using System.Collections.Generic;
public partial class Wallet
{
public Wallet()
{
this.Transaction = new HashSet<Transaction>();
this.Transaction1 = new HashSet<Transaction>();
this.User_Wallet = new HashSet<User_Wallet>();
this.Wallet_Item = new HashSet<Wallet_Item>();
}
public int walletID { get; set; }
public string name { get; set; }
public virtual ICollection<Transaction> Transaction { get; set; }
public virtual ICollection<Transaction> Transaction1 { get; set; }
public virtual ICollection<User_Wallet> User_Wallet { get; set; }
public virtual ICollection<Wallet_Item> Wallet_Item { get; set; }
}
}
Thanks for helping us.
I had the same problem some time ago and the solution for this was:
The entity framework was returning a serialized class instead of normal class.
eg. Wallet_asfawfklnaewfklawlfkawlfjlwfejlkef instead of Wallet
To solve that you can add this code:
base.Configuration.ProxyCreationEnabled = false;
in your Context file.
Since the context file is auto generated you can add it in the Context.tt
In the Context.tt file it can be added around lines 55-65:
<#=Accessibility.ForType(container)#> partial class <#=code.Escape(container)#> : DbContext
{
public <#=code.Escape(container)#>()
: base("name=<#=container.Name#>")
{
base.Configuration.ProxyCreationEnabled = false;
<#
if (!loader.IsLazyLoadingEnabled(container))
{
#>
this.Configuration.LazyLoadingEnabled = false;
<#
Try specifying a setter for the properties, something like this :
[DataContract]
public partial class Wallet
{
[DataMember]
public int getwalletID { get { return walletID; } set { } }
[DataMember]
public string getname { get { return name; } set { } }
}
If it still doesn't work, you may consider creating an intermediate POCO class for this purpose, and use mapper library like AutoMapper or ValueInjecter to transfer the data from the EF objects.
The POCO class should have same properties as your EF class :
[DataContract]
public class WalletDTO
{
[DataMember]
public int walletID { get; set; }
[DataMember]
public string name { get; set; }
}
And modify your method to return this class instead :
public WalletDTO getWallet()
{
Wallet w = new Wallet(); // or get it from db using EF
var dto = new WalletDTO();
//assuming we are using ValueInjecter, this code below will transfer all matched properties from w to dto
dto.InjectFrom(w);
return dto;
}
Are you trying to recieve a IEnumerable<Wallets>? If - yes, please modify your server class that returns the IEnumerable by adding .ToArray() method
The parameter request is always null using Web API. Am I missing something with using a strongly typed object as a parameter instead of simple types as the parameters.
Url
http://localhost:2222/api/v1/divisions?EventId=30
Controller Action
public virtual ApiDivisionsResponse Get(ApiDivisionsRequest request)
{
return _apiDivisionsService.GetDivisions(request);
}
Object
public class ApiDivisionsRequest : ApiAuthorizedRequest
{
public ApiDivisionsRequest()
{
Page = 1;
PageSize = 10;
}
public int EventId { get; set; }
public int PageSize { get; set; }
public int Page { get; set; }
public string[] Includes { get; set; }
}
I very strongly invite you to read the following article to better understand how parameter binding works in the Web API. After reading it you will understand that by default the Web API binds query string parameters to primitive types and request body content to complex types.
So if you need to bind query string parameters to complex types you will need to override this default behavior by decorating your parameter with the [FromUri] parameter:
public virtual ApiDivisionsResponse Get([FromUri] ApiDivisionsRequest request)
{
...
}
And yeah, I agree with you - that's a hell of a mess - model binding was so easy in plain ASP.NET MVC and they created a nightmare in the Web API. But once you know how it works you will avoid the gotchas.
I have a WCF service with a client application. I have complete control over both the client and server implementation. I have hundreds of methods in the WCF contract which need a piece of information supplied by the client. Instead of modifying hundreds of methods, is there a way I can send specific data from the client with every call to the service, possibly somewhere in the channel?
Maybe when the client is setting up the proxy before making the call, it can store this data somewhere in an internal property of the proxy... the data would then get sent to the server and from within the service method I could inspect the OperationContext or some other piece of memory to get this data back and use it?
Any ideas?
It sounds like you are wanting something like headers like with SOAP webservices. I'm not a WCF expert, but this looks like the WCF equivalent.
It shouldn't actually be that hard. The best way I can think of is to write an IClientMessageInspector that adds a SOAP header into the Message.Headers in its BeforeSendRequest method.
See e.g. http://weblogs.asp.net/paolopia/archive/2007/08/23/writing-a-wcf-message-inspector.aspx
You can't do this trivially. It will take some work.
It's true that SOAP Headers are the perfect way to pass out-of-band data to and/or from a service. But you already have your contract defined, and adding headers will change the contract.
I believe you'll have to start using message contracts.
Original:
[DataContract]
public class ComplexObject
{
[DataMember(Name = "Id")]
public int Id;
[DataMember]
public string Name;
}
[ServiceContract()]
public interface IMyContract
{
void MyOperation(ComplexObject co);
}
public class MyService : IMyContract
{
#region Implementation of IMyContract
public void MyOperation(ComplexObject co)
{
// use co.*
}
#endregion
}
Using Message Contracts:
[DataContract]
public class ComplexObject
{
[DataMember(Name = "Id")]
public int Id;
[DataMember]
public string Name;
}
[DataContract]
public class MyHeader
{
[DataMember]
public string UserName;
[DataMember]
public string Password;
}
[DataContract]
public class OutputHeader
{
[DataMember]
public string Token;
}
[MessageContract]
public class MyOperationRequest
{
[MessageHeader]
public MyHeader Authentication;
[MessageBodyMember]
public ComplexObject TheObject;
}
[MessageContract]
public class MyOperationResponse
{
[MessageHeader]
public OutputHeader OutputHeader;
}
[ServiceContract()]
public interface IMyContract
{
MyOperationResponse MyOperation(MyOperationRequest request);
}
public class MyService : IMyContract
{
public MyOperationResponse MyOperation(MyOperationRequest request)
{
// use request.TheObject.*
// Can also read request.Authentication.*
return new MyOperationResponse
{ OutputHeader = new OutputHeader { Token = "someToken" } };
}
}