Is it possible to handle receiving data in camel casing using OData?

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Is it possible to handle receiving data in camel casing using OData?

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#1 by (1 votes)
#2 by (-1 votes)

51

In the Register method of the WebApiConfig class I have set a CamelCasePropertyNamesContractResolver

public static void Register(HttpConfiguration config)
{           
    //Resto do código removido para brevidade
    config.Formatters.JsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
}

This causes the data received (or sent) by JSON to be converted from camelCase (client-default JavaScript) to TitleCase (default that I use in properties on the server) and vice versa. p>

Ex. of JSON that the API receives in a PATCH normal method (without using Delta<T> )

{
    id: 1,
    nome: "Joaquim",
    idade: 150
}

This is "translated" into

{
    Id: 1,
    Nome: "Joaquim",
    Idade: 150
}

So far so good, the problem is that I have a action PATCH on a ApiController that makes use of

I have read in some places that OData uses a serializer and a deserializer itself and this should be the problem.

Method Delta<T> of PATCH :

[HttpPatch, ResponseType(typeof(void))]
public async Task<IHttpActionResult> Patch(int id, [FromBody] Delta<Entity> changes)
{
    var entity = await _db.Entities.FindAsync(id);
    if (entity == null)        
        return NotFound();

    changes.Patch(entity);
    _db.SaveChanges();

    return StatusCode(HttpStatusCode.NoContent);
}

Is there any way to treat the " casing " of data received in ApiController using OData?

Am I going to need to write a new serializer or is there something ready that can help me with this? If you need to write a serializer, can you help me with at least the basic implementation of it?

JSON example I get in method with actions

{ nome: "Teste método PATCH" }

If I send JSON, like the one below, it works fine.

{ Nome: "Teste método PATCH" }

Note: I'm using OWIN, but the application is being hosted on IIS (using the Delta<T> ) package.

c# asp.net json asp.net-web-api-2

asked by anonymous 25.05.2016 / 15:37

2 answers

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score 1 · Answer 1

I believe this will solve the problem:

Apply this [CamelCasingFilter] attribute to any action you want to camel casing.

public class CamelCasingFilterAttribute : ActionFilterAttribute
{
    private JsonMediaTypeFormatter _camelCasingFormatter = new JsonMediaTypeFormatter();

    public CamelCasingFilterAttribute()
    {
        _camelCasingFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
    }

    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {
        ObjectContent content = actionExecutedContext.Response.Content as ObjectContent;
        if (content != null)
        {
            if (content.Formatter is JsonMediaTypeFormatter)
            {
                actionExecutedContext.Response.Content = new ObjectContent(content.ObjectType, content.Value, _camelCasingFormatter);
            }
        }
    }
}

Source: link

score -1 · Answer 2

You can use the EnableLowerCamelCase extension method:

Using System.Web.OData.Builder;
Using System.Web.OData.Extensions;

Var builder = new ODataConventionModelBuilder ();
Builder.EnableLowerCamelCase ();