DevForce Community Forum : Generic Emtpy Guid Verifier

Generic Emtpy Guid Verifier : Thanks! That really helped....

Fri, 03 Sep 2010 06:53:22 -700

Author: BringerOD
Subject: 2115
Posted: 03-Sep-2010 at 6:53am

Thanks!

That really helped.

Generic Emtpy Guid Verifier : Hi Bryan;I agree that the Verification...

Thu, 02 Sep 2010 17:49:13 -700

Author: DenisK
Subject: 2115
Posted: 02-Sep-2010 at 5:49pm

Hi Bryan;

I agree that the Verification chapter needs some work. We have made that a priority to improve the Wiki in the next few months.

As for your question, instead of creating a DelegateVerifier, we should use a PropertyValueVerifier abstract class to create the generic GUID.Empty verifier. The PropertyValueVerifier abstract class is useful when you need to create a custom verifier when comparing objects or values. You can refer to our API Documentation --> IdeaBlade.Validation namespace for more useful Verifier classes.

Here's the code to create your generic GUID.Empty verifier:

private static Verifier CheckForGUIDEmptyVerifier(Type entityType, string propertyName) {

Verifier v = new GUIDEmptyVerifier(entityType, propertyName);

v.VerifierArgs.ErrorMessageInfo.ErrorMessage =

String.Format("{0} cannot be blank", propertyName);

return v;

}

public class GUIDEmptyVerifier : PropertyValueVerifier {

public GUIDEmptyVerifier(Type pType, String propertyName, String displayName = null, bool? shouldTreatEmptyStringAsNull = null)

: base(new PropertyValueVerifierArgs(pType, propertyName, false, displayName, shouldTreatEmptyStringAsNull)) {

}

protected override VerifierResult VerifyValue(object itemToVerify, object valueToVerify,

TriggerContext triggerContext, VerifierContext verifierContext) {

var aGUID = (Guid)valueToVerify;

var result = (aGUID != Guid.Empty);

return new VerifierResult(result);

}

Generic Emtpy Guid Verifier : This is how far I got. Just...

Wed, 01 Sep 2010 21:42:10 -700

Author: BringerOD
Subject: 2115
Posted: 01-Sep-2010 at 9:42pm

This is how far I got.

Just not sure how to get the property to validate.

public static class VerifierHelper

{

private static Verifier GuidCannotBeEmpty(EntityProperty pEntityProperty)

{

string description = pEntityProperty.PropertyInfo.Name + " cannot be blank.";

var verifier = new DelegateVerifier<EntityBase>(description, GuidCannotBeEmptyCondition);

verifier.AddTriggers(pEntityProperty.Name);

verifier.VerifierOptions.ExecutionModes = VerifierExecutionModes.InstanceAndOnAfterSetTriggers;

return verifier;

}

private static VerifierResult GuidCannotBeEmptyCondition(

EntityBase entityBase, TriggerContext pTriggerContext, VerifierContext pVerifierContext)

{

if (pTriggerContext != null &&

pTriggerContext.Timing == TriggerTiming.BeforeSet)

{

throw new VerifierException("Verifier not implemented for Preset");

}

return new VerifierResult(?????);

}

Generic Emtpy Guid Verifier : Can someone help me make a generic...

Wed, 01 Sep 2010 21:39:28 -700

Author: BringerOD
Subject: 2115
Posted: 01-Sep-2010 at 9:39pm

Can someone help me make a generic verifier that checks a Guid to see if its equal to Guid.Empty?

I am not getting how to write these yet. They don't make alot of sense to me.

I can see how to make one for a specific entity type.

The whole process is very complicated for someone who is new to DevForce.

I have read the documentation 3 times now.

Bryan