Question

I have a customized ModelBinder which bind web from with a object using code like this”

    [ModelBinder(typeof(CustomizedModelBinder))]
    public class Widget{ ... }

This modelbinder may throw exceptions and where should I add code to catch those exceptions? Thanks in advance!

Answer 1

From design perspective it is better for a model binder to add model errors instead of throwing exceptions:

ModelState.AddModelError("Phone", "Phone number is invalid.");

This way, later in your action you could check if the model is valid:

if (!ModelState.IsValid)
{
    ...
}