What should I return when modelstate is invalid?

Question

I have a partial view in a layout file, my partial view has a form and some server side validation. when my form is submitted and modelstate is invalid what should I return?

something is bold here:

1) I don't want to use javascript

2) I want to show modelstat errors in client side

Thanks :)

Answer 1

You should add @Html.ValidationSummary() in that place, where you want to display your errors

Answer 2

If you want it to behave like a partial view:

return PartialView();

This posts the original model back with the current model state. You can use @Html.ValidationSummary() to display the errors as stated by @FSou1.