How to enter into this rulefor fluent validation only if textbox is empty

Question

I am using simple form fluent validations. How to enter into this rule only if it's Notes Textbox is empty and should return validation if that linq query returns a record.

If textbox is not empty it should not enter into this rule.

Here's what I have tried

RuleFor(i => i.Notes)
                .NotEmpty()
                .When((i) =>
                    {
                        bool result = false;

            result = _DAL.GetExists<EmployeeScheduleTypes>
                                    (q => q.Type == i.Type);


                        return result;
                    })
                .WithMessage("Notes is required");

Sergey Berezovskiy · Accepted Answer · 2017-04-18T22:44:16.587

2

Extension method When should be used for specifying condition when property validator should be run. In your case condition is not empty Notes property. And validation predicate should go to Must extension:

RuleFor(i => i.Notes)
    .Must(i => _DAL.GetExists<EmployeeScheduleTypes>(q => q.Type == i.Type))
    .When(i => String.IsNullOrEmpty(i.Notes))
    .WithMessage("Notes is required");

This rule means: when Notes is empty then object should have existing type, otherwise set error for Notes property.

edited Apr 18 '17 at 22:44

answered Apr 18 '17 at 22:38

Sergey Berezovskiy

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When Notes textbox is empty its not validating – sgl Apr 18 '17 at 22:50
@sgl no, it's validating. Your problem is elsewhere. Make sure `_DAL.GetExists(q => q.Type == i.Type)` returns false if you are expecting to see an error – Sergey Berezovskiy Apr 18 '17 at 22:52
1

Thank You So Much ..That's Fixed – sgl Apr 18 '17 at 22:59

How to enter into this rulefor fluent validation only if textbox is empty

1 Answers1