When submitting a form in POST mode, if the background accepts objects that inherit the parent class, the corresponding data of the form cannot be mapped.

When submitting a form in POST mode, if the background accepts objects that inherit the parent class, the corresponding data of the form cannot be mapped.
Introduction

When submitting a post submission form, I put several hidden fields in the form to store data. The form name attribute is consistent with the signature of the background object attribute. Only the background Action parameter contains the inheritance relationship, so the corresponding value of the form cannot be obtained. At the beginning, I was wondering why I couldn't get the value? I asked my colleagues to know that it was because the entity was accepted to contain inheritance relationships.

 

Solution

If the background action entity cannot be mapped, you can only use Request ["hidden_field"] to manually obtain form data. I wonder if the MVC attribute can solve the problem?