DevForce Community Forum : Validate sometimes null property

Validate sometimes null property : Denis,Works perfectly.Thanks,Steve...

Wed, 09 Nov 2011 04:56:30 -700

Author: spudcud
Subject: 3086
Posted: 09-Nov-2011 at 4:56am

Denis,

Works perfectly.

Thanks,

Steve

Validate sometimes null property : Hi Steve;You need to override...

Tue, 08 Nov 2011 19:33:54 -700

Author: DenisK
Subject: 3086
Posted: 08-Nov-2011 at 7:33pm

Hi Steve;

You need to override the HandleNullPropertyValue method for nulls to be handled by the VerifyValue method.

// Can be overridden to return a custom null handling result or if null is returned,
// nulls will be handled by the VerifyValue method
protected override VerifierResult HandleNullPropertyValue(TriggerContext triggerContext, VerifierContext verifierContext) { 
    return null;
}

Validate sometimes null property : I have a date property that...

Tue, 08 Nov 2011 05:22:09 -700

Author: spudcud
Subject: 3086
Posted: 08-Nov-2011 at 5:22am

I have a date property that is nullable in the database but based on business logic may not be null in specific cases. To accomplish this I figured inheriting a class from PropertyValueVerifier would be the best way. The VerifyValue method is called when the date is changed to another date but does not get called when the date goes to null. Is this a bug or am I doing something wrong?

...
return new NullEndDateVerifier(
   typeof(StatusRqst),
   EntityPropertyNames.EndDateTimeDt,
   null,
   true);
...
      public class NullEndDateVerifier : PropertyValueVerifier
      {
         public NullEndDateVerifier(
            Type a_entityType,
            string a_sPropertyName,
            string a_sDisplayName = null,
            bool? a_bShouldTreatEmptyStringAsNull = null)
            : base(new PropertyValueVerifierArgs(a_entityType, a_sPropertyName, false, a_sDisplayName, a_bShouldTreatEmptyStringAsNull))
         { }
         public NullEndDateVerifier(PropertyValueVerifierArgs a_verifierArgs)
            : base(a_verifierArgs)
         { }
         protected override VerifierResult VerifyValue(object itemToVerify, object valueToVerify, TriggerContext triggerContext, VerifierContext verifierContext)
         {
            return new VerifierResult(true);
         }
      }

Thanks,

Steve