Hi Miguel, I ran the code: var ctx = new ValidationContext(dfTermItem.CurrentItem, null, null) { MemberName = "TermCategoryID" }; var validationResults = new Collection<ValidationResult>(); //validate against a guid that should fail if (Validator.TryValidateProperty(new Guid("00000000-0000-0000-0022-000000000002"), ctx, validationResults)) { Debug.WriteLine("Success"); } else { Debug.WriteLine("Fail"); }
It always returns "Success" and unfortunately, it didn't fire the Custom Validator at all. dfTermItem.CurrentItem is of type "Term" Term has a property TermCategoryID In the metadata.cs file, TermCategoryID is declared as follows: [CustomValidation(typeof (TermCustomValidation),"EnsureTermCategory",ErrorMessageResourceName = "TTermCategoryRequiredError", ErrorMessageResourceType = typeof (ValidationErrorResources))] [Bindable(true, BindingDirection.TwoWay)] public Guid TermCategoryID; TermCustomValidation is a static class: public static class TermCustomValidation { public static ValidationResult EnsureTermCategory(Guid TermCategoryID, ValidationContext validationContext) { Term currentTerm = validationContext.ObjectInstance as Term; if (currentTerm != null) { if (currentTerm.TermCategoryID == Guid.Empty) { return new ValidationResult("Term Type is a required field."); } //fyi, EnumHelper.GetID simply returns a guid from an attribute attached to an enum value if (currentTerm.TermCategoryID==EnumHelper.GetID(TermCategoryList.Vendor)) { if (currentTerm.VendorID == null || currentTerm.VendorID == Guid.Empty) { return new ValidationResult("Vendor is required when a Vendor Term Type is selected."); } } else if (currentTerm.TermCategoryID == EnumHelper.GetID(TermCategoryList.Model)) { if (currentTerm.ModelID == null || currentTerm.ModelID == Guid.Empty) { return new ValidationResult("Vendor, Brand and Model are required when a Model Term Type is selected."); } } } return ValidationResult.Success; } Note that it never actually debugs into the EnsureTermCategory method. I would have thought it would have returned "Failed"! Regards, Tony From: ozsilverlight-boun...@ozsilverlight.com [mailto:ozsilverlight-boun...@ozsilverlight.com] On Behalf Of Miguel Madero Sent: Thursday, 28 January 2010 11:10 AM To: ozSilverlight Subject: Re: RIA Domain Services and required dependencies I've not experienced that issue. Try to explicitly validate the property to see if that's an issue with the DataForm or just with how you set up the validation. var ctx = new ValidationContext(this, null, null) { MemberName = "NameOfYourPropertyGoesHere" }; var validationResults = new Collection<ValidationResult>(); if (Validator.TryValidateProperty("yourNewValueGoesHere", ctx, validationResults)) // It was valid else // it wasn't valid, check the validationResults for details Could you also try it with the example on the link I sent? -- Miguel A. Madero Reyes www.miguelmadero.com (blog) m...@miguelmadero.com _______________________________________________ ozsilverlight mailing list ozsilverlight@ozsilverlight.com http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight