Question

I’m trying to implement authorization as Seroter described here (Service Authorization section). I’ve GAC’ed the library, changed machine.config and able to pick the custom behavior in Select Behavior Extension dialog. But I can’t set the ‘WindowsGroup’ value, it gives me “Object reference not set to an instance of an object” and I can’t figure why. Did anybody implement service authorization?

Answer 1

Finally solved this problem.

using System;
using System.Configuration;
using System.ServiceModel.Configuration;

namespace Esb.Service.Authorization
{
    public class EsbBehaviorElement : BehaviorExtensionElement
    {
        private const string _windowsgroupIndexName = "windowsgroup";

        public EsbBehaviorElement()
        {
            if (!base.Properties.Contains(_windowsgroupIndexName))
            {
                base.Properties.Add(new ConfigurationProperty(_windowsgroupIndexName, typeof(string)));
            }
        }

        [ConfigurationProperty("WindowsGroup", IsRequired = false, DefaultValue = "")]
        public string WindowsGroup
        {
            get
            {
                return (string)base[_windowsgroupIndexName];
            }
            set
            {
                base[_windowsgroupIndexName] = value;
            }
        }

        public override Type BehaviorType
        {
            get
            {
                return typeof(EsbServiceBehavior);
            }
        }

        protected override object CreateBehavior()
        {
            return new EsbServiceBehavior(WindowsGroup);
        }
    }
}

I don’t know why Seroter’s solution works without ctor where one should add “windowsgroup” property to the base collection of properties.