DevForce Community Forum : StringLengthVerifier no longer throw exception for empty string

StringLengthVerifier no longer throw exception for empty string : Thanks DenisK,it's clear...

Mon, 11 Jun 2012 20:59:37 -700

Author: afrizal.chen
Subject: 3482
Posted: 11-Jun-2012 at 8:59pm

Thanks DenisK,

it's clear to me now.

StringLengthVerifier no longer throw exception for empty string : Hi Afrizal,That is correct. I...

Thu, 07 Jun 2012 12:48:22 -700

Author: DenisK
Subject: 3482
Posted: 07-Jun-2012 at 12:48pm

Hi Afrizal,

That is correct. I just realized you're expecting an exception but by default, the ErrorNotificationMode is Notify, which causes notification through the INotifyDataErrorInfo and IDataErrorInfo interfaces for binding purposes.

You can change this mode to Exception if you're expecting it throw an exception. See code sample below.

    [TestMethod]
    public void VerifierEmptyOrNullString() {
      var emp = new Employee();
      _em1.AddEntity(emp);
      _em1.VerifierEngine.DefaultVerifierOptions.ShouldTreatEmptyStringAsNull = true;
      
      //Set VerifierEngine to throw exception
      _em1.VerifierEngine.DefaultVerifierOptions.ErrorNotificationMode = VerifierErrorNotificationMode.ThrowException;
      try {
        emp.FirstName = String.Empty;
      } catch (Exception ex) {
        Assert.IsTrue(ex.Message.Contains("required"));
      }

      //Default is Notify
      _em1.VerifierEngine.DefaultVerifierOptions.ErrorNotificationMode = VerifierErrorNotificationMode.Notify;
      emp.FirstName = String.Empty;
      Assert.IsTrue(emp.EntityAspect.ValidationErrors.Any(vr => vr.Message.Contains("required")));
    }

Learn more about ErrorNotificationMode here. http://drc.ideablade.com/xwiki/bin/view/Documentation/validation-configure#HErrorNotificationMode

StringLengthVerifier no longer throw exception for empty string : Hi DenisK,It's on the client...

Wed, 06 Jun 2012 17:53:01 -700

Author: afrizal.chen
Subject: 3482
Posted: 06-Jun-2012 at 5:53pm

Hi DenisK,

It's on the client side.

Isn't the default value for ShouldTreatEmptyStringAsNull is true?

As i do not change its value, it shall stays as true, and I would expect to get the exception when the property is set to string.empty.

StringLengthVerifier no longer throw exception for empty string : Hi Afrizal,Where do you expect...

Wed, 06 Jun 2012 17:33:52 -700

Author: DenisK
Subject: 3482
Posted: 06-Jun-2012 at 5:33pm

Hi Afrizal,

Where do you expect to see the exception thrown? On the client or server?

Remember that the EntityManager and EntityManager.VerifierEngine are both different instance on the client and server. So make sure you're setting the ShouldTreatEmptyStringAsNull flag on both client and server.

A typical place to set this on server is in your custom SaveInterceptor.

public class SaveInterceptor : EntityServerSaveInterceptor {
      protected override bool ValidateSave() {
      EntityManager.VerifierEngine.DefaultVerifierOptions.ShouldTreatEmptyStringAsNull = false;
      return base.ValidateSave();
    }
  }

StringLengthVerifier no longer throw exception for empty string : I have many properties with such...

Wed, 06 Jun 2012 01:42:33 -700

Author: afrizal.chen
Subject: 3482
Posted: 06-Jun-2012 at 1:42am

I have many properties with such attribute below:

[IbVal.StringLengthVerifier(MaxValue=150, IsRequired=true, ErrorMessageResourceName="Party_ID")]

When I set Party.ID = string.empty; it's no longer throwing "ID is required" exception.

I also check my EntityManager.VerifierEngine.DefaultVerifierOptions.ShouldTreatEmptyStringAsNull, the value is true.

With these settings, I would expect to receive an exception when Party.ID is set to string.empty.

And I have many code depending on this feature.