Using Foolproof RequiredIf on multiplecondition

Question

I have a dropdownlist named CustomerType with the the following values

Id     Name
1      Student
2      Non-Employed
3      Employed
4      SelfEmployed

and I have one more property in my viewmodel public string CompanyAddress{ get; set; }

My goal is to make CompanyAddress required if dropdownlist has values 3 or 4

I have tried the following but gets error Cannon have duplicate RequiredIf

    [RequiredIf("customerTypeID", 3, ErrorMessage = "Please enter company address")]
    [RequiredIf("customerTypeID", 4, ErrorMessage = "Please enter company address")]
    public string CompanyAddress { get; set; }

Micteu · Answer 1 · 2015-12-22T19:53:39.863

3

This will put logic in your model (which is usually a no-no), but it will work. You could change your validation to be like this:

[RequiredIf("CompanyAddressRequired", true, ErrorMessage = "Please enter company address")]

And then have a property with a getter like this:

public bool CompanyAddressRequired
{
    get
    {
        return customerTypeID == 3 || customerTypeID == 4;
    }
}

edited Dec 22 '15 at 19:53

answered Dec 15 '15 at 21:00

Micteu

451
5
17

1

Any idea how this might work on front end as well? Because it throws me an error saying "Uncaught TypeError: Cannot read properties of undefined (reading 'value'). Exception occurred when checking element _ElementName_, check the 'requiredif' method." – Albos Hajdari Mar 20 '22 at 22:59
Oh, gosh, I haven't used this sort of validation in the last five years. Hopefully someone else can help you. Sorry. – Micteu Mar 30 '22 at 17:02

score 0 · Answer 2 · answered Mar 24 '23 at 10:16

For the "TypeError: Cannot read properties of undefined (reading 'value')" problem, add a hidden input element on your page for that new CompanyAddressRequired property.

<input type="hidden" id="CompanyAddressRequired"/>

I'm still working on getting the switchable field to provide validation summaries on my front end but this resolves the JS error.

Using Foolproof RequiredIf on multiplecondition

2 Answers2

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