How to trim model spaces in ASP.NET MVC Web API

Question

What is the best way to trim all the model properties passed to the MVI web api (post method with a complex object). You can simply make a call to the Trim function in the getter of all the properties. But I really don't like it.

I need a simple way similar to the one specified for MVC here ASP.NET MVC: the best way to trim lines after data input. Should I create a custom mediator?

Answer 1

To trim all incoming string values ​​in a web API, you can define Newtonsoft.Json.JsonConverter :

 class TrimmingConverter : JsonConverter { public override bool CanConvert(Type objectType) { return objectType == typeof(string); } public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) { if (reader.TokenType == JsonToken.String) if (reader.Value != null) return (reader.Value as string).Trim(); return reader.Value; } public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) { var text = (string)value; if (text == null) writer.WriteNull(); else writer.WriteValue(text.Trim()); } } 

Then register it on Application_Start . The convention for this is in FormatterConfig , but you can also do this in Application_Start Global.asax.cs . Here it is in FormatterConfig :

 public static class FormatterConfig { public static void Register(HttpConfiguration config) { config.Formatters.JsonFormatter.SerializerSettings.Converters .Add(new TrimmingConverter()); } }