README.md

Qowaiv

ASP.NET Core MVC Model Binding

Model Binding with ASP.NET Core MVC works out-of-the-box with one exception: If the binding fails, a generic error message:

'String input' is invalid.

This can be quite inconvenient, and the only way to overcome to provide a custom model binder.

Example Implementation

Basically, this implementation uses the exception message thrown by the type converter to update the model state if the binding failed: TypeConverterModelBinder.cs

Registration

A custom model binder should be registered in the Startup class:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc((options) =>
        {
            options.ModelBinderProviders.Insert(0, new TypeConverterModelBinder());
        });
    }
}