MVC validation 07-Custom model level validation

Original: MVC validation 07-Custom model level validation

In the general custom validation feature, we implement iclientvalidatable by inheriting Validationattribute, and can only complete custom validation of a property.
You can use Ivalidatableobject to complete model-level validation.

-Model to implement the Ivalidatableobject interface

 Public class Registermodel:ivalidatableobject

{

     Public int Registercount{get;set;}

     Public int Qutoa{get;set;}

    Implement the Ivalidatableobject interface method for custom validation

     Public Ienumerable<validationresult> Validate (Validationcontext validationcontext)

    {

        New List<validationresult> ();

        if (Registercount > Quota)

        {

            Results. ADD (new Validationresult ("The number of applicants has exceeded the quota limit"newstring"Registercount " }));

        }

        if (registercount>3)

        {

            Results. ADD (new Validationresult ("up to three participants"newstring"Registercount" }));

        }

        return results;

    }

}

It is visible that validation rules are customized at the model level.