Custom view model binders

Custom view model binders

To use custom model view binder you should register it using HttpModelHandler.RegisterModelBinder, it will be added to binders pipeline, and register it in IOC container: DIContainer.Current.Register<MyModelBinder>.

public class Startup
{
    public void Configuration(IAppBuilder app)
    {
        ...

        HttpModelHandler.RegisterModelBinder<MyModelBinder>();

        app.UseSimplifyWeb();
    }

    public void ConfigureServices(IServiceCollection services)
    {
        ...

        DIContainer.Current.Register<MyModelBinder>(LifetimeType.Singleton);

        ...
    }
}

Binder should be deriver from IModelBinder interface.

public class MyModelBinder : IModelBinder
{
    public Task BindAsync<T>(ModelBinderEventArgs<T> args)
    {
		// Checking binder applicability

        if (args.Context.Request.ContentType == null || !args.Context.Request.ContentType.Contains("required mime type"))
			return;

        // deserialization logic

        args.SetModel(/* set deserialized model here to use by controllers */);

    }
}

If you just want to use your binder without default binders, then you should clear binders list first.

HttpModelHandler.ModelBindersTypes.Clear();
HttpModelHandler.RegisterModelBinder<MyModelBinder>();

One example of custom model binder is JsonModelBinder.

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