Greater than date validation in data annotation that accepts null date

Question

I've seen an answer to this here Greater Than or Equal To Today Date validation annotation in MVC3 and was attempting to use the Remote option suggested in my .Net Core 3.1 application. I have put a breakpoint in my action but it's never hitting it, just throwing the validation over and over again regardless of the date entered (or blank). Here's what I've tried:

As annotation on my data model:

[Remote("ValidateDateEqualOrGreater", "AccountViewer", HttpMethod="POST", ErrorMessage = "Date cannot be prior to today's date")]
public DateTimeOffset? PostDate {get; set; }

Inside my controller:

[HttpPost]
public JsonResult ValidateDateEqualOrGreater(DateTimeOffset Date)
{
    if (Date == null || Date >= DateTimeOffset.UtcNow.Date)
    {
        return Json(true);
    }
    return Json(false);
}

It doesn't appear that the code is getting called at all, as I'm not hitting any of the breakpoints in it. What else do you have to do to get the Remote() annotation working?

Did you already take a look at this? - https://learn.microsoft.com/en-us/aspnet/core/mvc/models/validation?view=aspnetcore-3.1#remote-attribute — Sai Gummaluri, Aug 05 '20 at 21:06
Yes, I seem to be doing the right thing but it's not calling the action. — nonesuch, Aug 05 '20 at 21:14
A fundamental check, are you sure this call is getting triggered from the client side? Can you confirm that from the network tab of your browser? — Sai Gummaluri, Aug 05 '20 at 21:18
Good call. I just checked and confirmed that it's getting a 200 response back from ValidateDateEqualOrGreater in my network tab — nonesuch, Aug 05 '20 at 21:25
Could you also confirm the request and response payloads, please? Is the data we are looking at, null by any chance (maybe the data being sent to server)? What is the response body in the case of 200? — Sai Gummaluri, Aug 05 '20 at 21:39

score 0 · Answer 1 · answered Aug 05 '20 at 21:04

0

I think you forget the HttpMethod ="POST" in your RemoteAttribute définition. ;)

answered Aug 05 '20 at 21:04

Orkad

630
5
15

I did... added that in and it still behaves the same. Thanks for the note. – nonesuch Aug 05 '20 at 21:09
RemoteAttribute using ajax to validate your data. Can you see something on your browser console ? – Orkad Aug 05 '20 at 21:14
Nothing on the console at all. The validation error is thrown regardless of what date (or none) that I put in, but it never hits the controller. – nonesuch Aug 05 '20 at 21:16
It can be related to your "DateTimeOffset" type, can you try to change it just for testing ? – Orkad Aug 05 '20 at 21:18
All my dates are DateTimeOffset so it's a requirement to have that. – nonesuch Aug 05 '20 at 21:26

score 0 · Accepted Answer · answered Aug 05 '20 at 21:54

I have major egg on my face. My breakpoint wasn't set properly. The function failed because the blank date comes through as "01/01/0001" and not null and I had to account for that. It's working now. Sorry for the firedrill and thanks for all the assistance.

Working function:

[HttpPost]
        public JsonResult ValidateDateEqualOrGreater(DateTimeOffset Dt)
        {
            DateTime nulltime = new DateTime(0001, 1, 1, 0, 0, 0);

            var nulldt = new DateTimeOffset(nulltime, new TimeSpan(0, 0, 0));
            if (Dt == null || Dt == nulldt || Dt >= DateTimeOffset.UtcNow.Date)
            {
                return Json(true);
            }
            return Json(false);
        }

Greater than date validation in data annotation that accepts null date

2 Answers2