ASP.NET Web API binding model properties to different request properties

Question

I'm trying to write a custom model binder that can bind a property decorated with an attribute to a differently-named request property e.g.

JSON request

{
    "app": "acme"
}

Request model (excerpt)

[Alias("app")]
public string ApplicationName { get; set; }

... should result in ApplicationName being populated with the value 'acme'. I'm getting stuck writing the custom model binder for this:

Model binder

public BindToAliasModelBinder : IModelBinder {
    public bool BindModel(HttpActionContext actionContext, ModelBindingContext bindingContext) {
        ...
    }
}

Model binder provider

public class BindFromAliasModelBinderProvider : ModelBinderProvider {
    public override IModelBinder GetBinder(HttpConfiguration configuration, Type modelType) {
        return new BindFromAliasModelBinder();
    }
}

I've registered the provider globally and the binder is being hit as expected. I'm at a loss for what to do next - how do I iterate through the request values and conditionally bind based on the presence of the attribute?

RaghuRam Nadiminti · Accepted Answer · 2013-03-11 21:27:52Z

1

If all you want to do is aliasing, you can use JsonPropertyAttribute, something like [JsonProperty(PropertyName = "app")] on the property.

answered Mar 11, 2013 at 21:27

RaghuRam Nadiminti

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2 Comments

derek lawless Over a year ago

I've tried this, unfortunately it doesn't appear to work for binding. I've also the DataMember attribute with no luck.

Zapnologica Over a year ago

Did you ever find a solution. I wast to use short names in the actual json but have meaningful variable name for debugging

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