Hi,

You can hook up to the TemplateResolved event of the TemplateResolver. One way to do it is in an initialization module:

[ModuleDependency(typeof(EPiServer.Web.InitializationModule))]
[InitializableModule]
public class TemplateInitialization : IInitializableModule
{
    public void Initialize(InitializationEngine context)
    {
        context.Locate.TemplateResolver().TemplateResolved += OnTemplateResolved;
    }

    public void Uninitialize(InitializationEngine context)
    {
        ServiceLocator.Current.GetInstance<TemplateResolver>().TemplateResolved -= OnTemplateResolved;
    }

    public void Preload(string[] parameters)
    {
    }

    static void OnTemplateResolved(object sender, TemplateResolverEventArgs args)
    {
        var myContent = args.ItemToRender as YourPageType;

        if (myContent != null) 
        {
            IEnumerable<TemplateModel> supportedTemplates = args.SupportedTemplates; // Should contain your three templates

            // Set template based on condition
            if (...)
            {
                args.SelectedTemplate = supportedTemplates.FirstOrDefault(...);
            }
        }
    }
}

Hi  Mattias,

Thanks a lot.You have solve my requiement.