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How to valid DateofBirth using fluent Validation in C# if it exceeds current year?
To specify a validation rule for a particular property, call the RuleFor method, passing a lambda expression that indicates the property that you wish to validate
RuleFor(p => p.DateOfBirth)
To run the validator, instantiate the validator object and call the Validate method, passing in the object to validate.
ValidationResult results = validator.Validate(person);
The Validate method returns a ValidationResult object. This contains two properties
IsValid - a boolean that says whether the validation suceeded.
Errors - a collection of ValidationFailure objects containing details about any validation failures
Example 1
static void Main(string[] args) {
List errors = new List();
PersonModel person = new PersonModel();
person.FirstName = "TestUser";
person.LastName = "TestUser";
person.AccountBalance = 100;
person.DateOfBirth = DateTime.Now.Date.AddYears(1);
PersonValidator validator = new PersonValidator();
ValidationResult results = validator.Validate(person);
if (results.IsValid == false) {
foreach (ValidationFailure failure in results.Errors){
errors.Add(failure.ErrorMessage);
}
}
foreach (var item in errors){
Console.WriteLine(item);
}
Console.ReadLine();
}
}
public class PersonModel {
public string FirstName { get; set; }
public string LastName { get; set; }
public decimal AccountBalance { get; set; }
public DateTime DateOfBirth { get; set; }
}
public class PersonValidator : AbstractValidator{
public PersonValidator(){
RuleFor(p => p.DateOfBirth)
.Must(BeAValidAge).WithMessage("Invalid {PropertyName}");
}
protected bool BeAValidAge(DateTime date){
int currentYear = DateTime.Now.Year;
int dobYear = date.Year;
if (dobYear <= currentYear && dobYear > (currentYear - 120)){
return true;
}
return false;
}
}Output
Invalid Date Of Birth
Updated on: 25-Nov-2020
3K+ Views
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