ASP.NET MVC - one validator on two textfields

I've got an interesting client requirement.

I have a control that needs to be displayed like so:

Date of xxx     [ mm ][ yy ]

There is a label with two textfields - one for month in digits and one for year in digits.开发者_如何学运维

Although there are two text fields, we want the validation to run once validating both fields.

Also there are a number of these controls on a page. How would be the best way to package this up so that I can call:

@Laberfor(x => x.Datexxx)
@EditorFor(x => x.Datexxx)

Thanks in advance

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If your control is strongly typed, you could implement IValidatableObject and its Validate method.

Assuming your model looks like this:

public class CombinedDateViewModel : IValidatableObject
{
    [Required]
    public int month { get; set; }
    [Required]
    public int year { get; set; }

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {        
        if(month > 12 || month < 1)
            yield return new ValidationResult("Month is out of range");
        if(year < 0 || year > 2020)
            yield return new ValidationResult("Year is out of range");
    }
}

The yielded validation results will manifest in the validation summary.