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Asp.net – display errors in form from a controller base

I have implemented a login form that utilizes the login controller, which serves as a base controller. While the controller functions properly, my concern lies with error handling. Regrettably, I am unable to display error messages within the form as there is no means to return error messages from the controller. I would greatly appreciate any assistance in resolving this issue.
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2

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  1. 0

    You could try return error message using ViewBag

    ...
            try
            {
                await HttpContext.SignInAsync(principal);
            }
            catch (Exception ex)
            {
                ViewBag.Error = ex.Message;
            }
...

    Then use @ViewBag.Error in razor to display message.

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  2. 0

    Please refer to the Microsoft documentation at the following link:

    Microsoft Documentation – ASP.NET Core MVC Validation

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