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What are validators?

From 1.0 to 2.0 validators were classes which validated values. They had to be created and set with properties.
Since 3.0, there are no more classes. Your fully able to create faster custom validators. HVS 3.0 uses the Func<>-delegates for easier usage.

All in one, validators checks if the "base-value" is in correct condition to the "reference-value". If they are, a validator returns "true" to the HVS. Otherwise it returns "false".

How does such a validator looks like?

This is the default "BoolValidator":
    public static class BoolValidator
    {
        public static ParameterCollection Default =
            new ParameterCollection(new StaticParameter("BoolValidator:Invert", false));

        /// <summary>
        /// Required parameters: BaseValue (typeof bool), ReferenceValue (typeof bool), BoolValidator:Invert (typeof bool).
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static bool Validate(ValidationObject obj)
        {
            bool invert = (bool) obj.Parameters["BoolValidator:Invert", false];
            bool baseValue = (bool)obj.Parameters["BaseValue"];
            bool referenceValue = (bool)obj.Parameters["ReferenceValue"];

            return invert ? baseValue != referenceValue : baseValue == referenceValue;
        }
    }

What the "Parameters" are, you can learn reading the "Parameters"-article.

Last edited Jul 14, 2011 at 3:30 PM by Razer, version 1

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