Constructor on type 'USStateValidator" not found.

Question

User-40703516 posted

I downloaded the Validation Application Block and I am attempting to use the already written USStateValidator that is provided with the ValidationAspNetQuickStart.

 I added the following to the ValidationQuickStart.BusinessEntities.dll.config file under "Address", "RuleSetB".

<property name="State">
            <validator messageTemplate="Site State: Must be a valid two-digit US state designation." messageTemplateResourceName=""
              messageTemplateResourceType="" tag="" type="ValidationQuickStart.CustomValidators.USStateValidator, ValidationQuickStart.CustomValidators, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
              name="USStateValidator" />
          </property>  

When I attempt to validate the form in the test application using "RulesetB", it gives me the followin error: "Constructor on type "ValidationQuickStart.CustomValidators.USStateValidator" not found."

Here is the code for the validator as provided by Microsoft (I have made no changes to it):

namespace ValidationQuickStart.CustomValidators
{
    [ConfigurationElementType(typeof(CustomValidatorData))]
    public class USStateValidator : DomainValidator<string>
    {
        private static List<string> stateCodes = new List<string>(new string[] {
            "AL", "AK", "AS", "AZ", "AR", "CA", "CO", "CT", "DE", "DC", "FM", "FL",
            "GA", "GU", "HI", "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", "MH",
            "MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", "NM",
            "NY", "NC", "ND", "MP", "OH", "OK", "OR", "PW", "PA", "PR", "RI", "SC",
            "SD", "TN", "TX", "UT", "VT", "VI", "VA", "WA", "WV", "WI", "WY"});

        public USStateValidator()
            : base(stateCodes)
        {
        }

        protected override string DefaultNonNegatedMessageTemplate
        {
            get { return "The supplied code does not represent a valid US State"; }
        }

    }
}

The USStateValidator appears to work normally when using "RulesetA" which uses only attributes on the BusinessEntity class.

Here is the example from the business entity class that works just fine:

[USStateValidator(Ruleset = "RuleSetA")] 
        public string State
        {
            get { return state; }
            set { state = value; }
        }

 

Does anyone know what is wrong with this?  I need to get this validator working using the xml file instead of declaring on the actual class itself.

Answer 1

User-40703516 posted

No ideas? 

Answer 2

User-40703516 posted

Well, found the problem.

 

I'm not sure why the validator works when called using the Attributes on a class, but in order to fix this I had to add a constructor to the validator class that took a "NameValueCollection" as a parameter.

 

So I added the following lines to the USStateValidator.cs class:

 

public USStateValidator(NameValueCollection myCollection)
            : base(stateCodes)
        {
        }