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Asked: 2026-05-26T15:09:37+00:00

I use the validation attribute on the fields of a class and has a

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I use the validation attribute on the fields of a class and has a requirement like that:
if field ‘a’ is validate succeed then process the validation of field ‘b’ but if the field ‘a’ is not throw validation , ignore the validation of field ‘b’.
does it feasible or i should think in other way?

public class myclass
{
[required]
public string a{get;set;}
[required]
public string b{get;set;]
}

i want:
1.if a pass the validate, then execute b ‘s validate
2.if a not pass the validate , then don’t execute the b ‘s validate

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1 Answer

  1. Editorial Team

    Check out the MVC.ValidationToolkit

    http://blogs.msdn.com/b/simonince/archive/2011/09/29/mvc-validationtookit-alpha-release-conditional-validation-with-mvc-3.aspx

    It contains these two validations that will help you out.

    • RequiredIfAttribute. This attribute says “this field is required if some other field has value X”. It is used as [RequiredIf(“OtherField”, “TargetValue”)]
    • RequiredEmptyIfAttribute. This attribute says “this field must be empty if some other field has value X”. It is used as [RequiredEmptyIf(“OtherField”, “TargetValue”)]
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