The TriggerTargetNavigator represents a delegate for navigating from the trigger object to the object being verified. The navigator can either be a path (PropertyDescriptor) or a custom method capable of bridging the two object types.

Here’s an example taken from the sample app accompanying the Verification Tutorial videos on the website, where the navigator is a path:

///<summary>Get the OrderDateAfterHired Verifier.</summary> private static Verifier GetOrderDateAfterHiredVerifier() {   string description = "OrderDate must be after the sales rep's HireDate.";   DelegateVerifier<Order> v =     new DelegateVerifier<Order>(description, OrderDateAfterHiredCondition);   v.ExecutionModes = VerifierExecutionModes.InstanceAndOnPostsetTriggers;   v.AddTrigger(EntityPropertyDescriptors.Order.OrderDate);   v.AddTrigger(new TriggerLink(     EntityPropertyDescriptors.Employee.HireDate, // Triggered by Employee.HireDate     EntityPropertyDescriptors.Employee.Orders, // Path from trigger (Employee) to Order     true)); // True = that path returns multiple orders   return v; }

Here’s an example where the navigator is a custom method:

private static Verifier GetOrderDateDiscontinuedProductVerifier() {   string description = "No orders allowed for discontinued products after 1/1/1998";   DelegateVerifier<Order> v =     new DelegateVerifier<Order>(description, GetOrderDateDiscontinuedProductCondition);   v.ExecutionModes = VerifierExecutionModes.All;   v.AddTrigger(EntityPropertyDescriptors.Order.OrderDate);   v.AddTrigger(new TriggerLink(     EntityPropertyDescriptors.Product.Discontinued, // Triggered by Product.Discontinued     GetOrdersAssociatedWithProduct, // Method bridging orders and products     true); // True = that method returns multiple orders   return v; } private static EntityList<Order> GetOrdersAssociatedWithProduct(Object pProduct) {   Product aProduct = (Product)pProduct;   OrderDetail[] details = aProduct.GetChildren<OrderDetail>(     EntityRelations.Product_OrderDetail,     QueryStrategy.Normal);   EntityList<Order> orders = aProduct.PersistenceManager.GetParents<Order>(     details, EntityRelations.Order_OrderDetail, QueryStrategy.Normal);   return orders; }

]]> Fri, 03 Aug 2007 12:05:58 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=354&PID=866#866 http://www.ideablade.com/forum/forum_posts.asp?TID=354&PID=865#865 Author: Customer
Subject: 354
Posted: 03-Aug-2007 at 11:53am

Do you have an example of how the TriggerTargetNavigator is used? I'm trying to implement cross object verification but can't seem to get it to work.]]> Fri, 03 Aug 2007 11:53:54 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=354&PID=865#865