SignalR as Broadcasting Mechanism of EventBus-Events #210

5 Answer(s)

• 

  0

  hikalkan created 9 years ago

  Support Team

  I tried to answer on stackoverflow :)

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  boeseb created 9 years ago

  Thanks for your fast response.

  While trying to fix the problem i noticed some other issue with the serialization of objects from the AppService and the Serialization signalR is doing.

  In serialized objects from AppService all properties of the serialized object start with a lower case letter in the javascript object. The same object sent via SignalR however has properties starting with a upper case letter. This difference is breaking my knockout bindings.

  Is there a way to fix this?

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  0

  hikalkan created 9 years ago

  Support Team

  Hi,

  Unfortunately, I don't know how to override serializing in SignalR. It may be easy but I don't know now. Did you searched it?

  ABP does it for web api here: <a class="postlink" href="https://github.com/aspnetboilerplate/aspnetboilerplate/blob/master/src/Abp.Web.Api/WebApi/AbpWebApiModule.cs#L52">https://github.com/aspnetboilerplate/as ... ule.cs#L52</a>

  formatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
  

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  boeseb created 9 years ago

  Thanks for the hint to the ContractResolver. I found following article that shows how to add a ContractResolver to SignalR

  EDIT: I found this code but am not sure where i need to register the Serializer into the IoC container

  using System;
  using System.Reflection;
  using Newtonsoft.Json.Serialization;
  using SignalR;
  
  namespace Loveboat.Configuration
  {
      public class SignalRContractResolver : IContractResolver
      {
          private readonly Assembly _assembly;
          private readonly IContractResolver _camelCaseContractResolver;
          private readonly IContractResolver _defaultContractSerializer;
  
          public SignalRContractResolver()
          {
              _defaultContractSerializer = new DefaultContractResolver();
              _camelCaseContractResolver = new CamelCasePropertyNamesContractResolver();
              _assembly = typeof (Connection).Assembly;
          }
  
          #region IContractResolver Members
  
          public JsonContract ResolveContract(Type type)
          {
              if (type.Assembly.Equals(_assembly))
                  return _defaultContractSerializer.ResolveContract(type);
  
              return _camelCaseContractResolver.ResolveContract(type);
          }
  
          #endregion
      }
  }
  

  And added this to the AbpModule Initialize Method:

  var serializersettings = new JsonSerializerSettings {
                  ContractResolver = new SignalRContractResolver()
              };
  
              var serializer = JsonSerializer.Create(serializersettings);
              IocManager.IocContainer.Register(Component.For<JsonSerializer>().Instance(serializer));
  

  It works, but is there a better way to solve it?

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  boeseb created 9 years ago

  Also my other problem is solved now. It had to do with the custom DependencyResolver. After setting it in my HubConfig getting a valid ConnectionManager from GlobalHost failed. So i got a not working HubContext. Setting the custom DependencyResolver in GlobalHost.DependencyResolver instead of only in the Hub Configuration fixed the problem. See [http://stackoverflow.com/a/31315380/4369295]) for code.

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