User711641945 posted
Hi bootzilla,
You means that the message did not show on the page and the validation did not pass.If so,you should check the following code:
<div class="form-group">
<label asp-for="DisplayOrder" class="control-label"></label>
<input asp-for="DisplayOrder" class="form-control" />
<span asp-validation-for="DisplayOrder" class="text-danger"></span>
</div>
If the validation passed, I suggest that you could share a simple demo to reproduce your issue.
Best Regards,
Rena