How to change regex MVC default messages

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Hi, everyone I am working on a vb mvc application. In my view model I have this code:

<RegularExpression("^[0-9]*$", ErrorMessage:="Please enter a whole positive number.")>
    Public Property IncludedColumns As Integer

When I try to enter for example a float (11.1) or NAN (11...) I got error messages, but not the message from the model (

ErrorMessage:="Please enter a whole positive number."

).

My question is how can I edit these messages and what should I do to receive the error message from the model?

What I have tried:

I searched in google how to edit these default messages but did not find anything.

Posted 7-Feb-19 3:46am

Member 13992723

Updated 7-Feb-19 4:27am

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Maciej Los · Answer 1 · 2019-02-07T03:50:00

Solution 1

Follow these:
Model validation in ASP.NET Core MVC | Microsoft Docs[^]
Adding Validation | Microsoft Docs[^]
Adding Validation to the Model | Microsoft Docs[^]

Posted 7-Feb-19 3:50am

Maciej Los

MadMyche · Answer 2 · 2019-02-07T04:27:00

There are also a couple of things you could do within the View to reduce the amount of forms submitted with improper data.

1. A javascript "numbers only" function to only allow numbers within an input

2. Client side validation. Another javascript option to check the form fields prior to submission which will block submission until the fields match the rules in the function. Plenty of examples of this on google.

3. HTML5 allows more types of input fields, and can be changed to number. It can be tricky if you are using html-helpers, but something akin to this should help

HTML

@Html.TextBoxFor(m => m.YourPropertyName,  new { @type = "number", @min = "0" })