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Jose Francis Jose Francis - 6 months ago 41
C# Question

Is there a way to validate a model which is created inside web api controller?

I have a controller where my PUT method uses multipart/form-data as content type and so I am getting the JSON and the mapped class thereby inside the controller.

Is there a way I could validate this model with respect to the annotations I have written in the model class while inside the controller?

public class AbcController : ApiController
public HttpResponseMessage Put()
var fileForm = HttpContext.Current.Request.Form;
var fileKey = HttpContext.Current.Request.Form.Keys[0];
MyModel model = new MyModel();
string[] jsonformat = fileForm.GetValues(fileKey);
model = JsonConvert.DeserializeObject<MyModel>(jsonformat[0]);

I need to validate "model" inside the controller.
FYI, I have added required annotations to MyModel().


Manual model validation:

using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

class ModelValidator
    public static IEnumerable<ValidationResult> Validate<T>(T model) where T : class, new()
        model = model ?? new T();

        var validationContext = new ValidationContext(model);

        var validationResults = new List<ValidationResult>();

        Validator.TryValidateObject(model, validationContext, validationResults, true);

        return validationResults;