Injecting service into a custom BusinessRule

[adrianwright109]

I am trying to create a custom business rule but am having trouble because in the
protected override void Execute(IRuleContext context) method I need to be able to access a service from DI.

Does anyone who if this is possible and if so how to acheive it?

It looks like you can inject into a CommandBase object as shown in the ProjectTracker sample

namespace ProjectTracker.Library
{
  [Serializable]
  public class ProjectExistsCommand : CommandBase<ProjectExistsCommand>
  {
    public static readonly PropertyInfo<int> ProjectIdProperty = RegisterProperty<int>(c => c.ProjectId);
    private int ProjectId
    {
      get { return ReadProperty(ProjectIdProperty); }
      set { LoadProperty(ProjectIdProperty, value); }
    }

    public static readonly PropertyInfo<bool> ProjectExistsProperty = RegisterProperty<bool>(c => c.ProjectExists);
    public bool ProjectExists
    {
      get { return ReadProperty(ProjectExistsProperty); }
      private set { LoadProperty(ProjectExistsProperty, value); }
    }

    [Execute]
    private void Execute([Inject] IProjectDal dal)
    {
      ProjectExists = dal.Exists(ProjectId);
    }
  }
}

[rockfordlhotka]

There is not currently support for injection into a rule.

In CSLA 6 the plan is to allow constructor injection into a rule.