MVC3 custom validation attribute for an "at least one is required" situation
- by Pricey
Hi I have found this answer already:
MVC3 Validation - Require One From Group
Which is fairly specific to the checking of group names and uses reflection.
My example is probably a bit simpler and I was just wondering if there was a simpler way to do it.
I have the below:
public class TimeInMinutesViewModel {
private const short MINUTES_OR_SECONDS_MULTIPLIER = 60;
//public string Label { get; set; }
[Range(0,24, ErrorMessage = "Hours should be from 0 to 24")]
public short Hours { get; set; }
[Range(0,59, ErrorMessage = "Minutes should be from 0 to 59")]
public short Minutes { get; set; }
/// <summary>
///
/// </summary>
/// <returns></returns>
public short TimeInMinutes() {
// total minutes should not be negative
if (Hours <= 0 && Minutes <= 0) {
return 0;
}
// multiplier operater treats the right hand side as an int not a short int
// so I am casting the result to a short even though both properties are already short int
return (short)((Hours * MINUTES_OR_SECONDS_MULTIPLIER) + (Minutes * MINUTES_OR_SECONDS_MULTIPLIER));
}
}
I want to add a validation attribute either to the Hours & Minutes properties or the class itself.. and the idea is to just make sure at least 1 of these properties (Hours OR minutes) has a value, server and client side validation using a custom validation attribute.
Does anyone have an example of this please?
Thanks
