I have a Parent,Son,Grandson which I am trying to display. The Parent is on a Miantemence Form and works fine. I have the Son and Grandson in two ListvIews , side by side. The Son is dispaying fine. When I land on each record of the Son, I want the Grandson records to show, just for the relevant son. Nothing is being displayed on the Grandson list. I have set up as follows: The Foreign  Key for the Grandson is got from the Primary Key on the Son

SonBo.Navigated... This.ListView2.Requery();    //to requery the Grandson ListView

Grandson.ListView.Populating...  e.Parameters[0].value  = this.SonBO["Son_PK"];  //to get Primary key from the Son

Grandson ListView.Properties... PopulateOnFormLoad=Manual  MethodToExecute=FillByParentPrimaryKey(Int32)  (primary key is Numeric)

What am I missing ?

Well, with the infomration you have provided it is hard to tell what your code may be doing.  I see that you are calling the Fill method on the integer PK, but do you have the relationship setup on the BOs, etc.?  Here are some things to check:

• Verify that the relationship is setup between the Child -> GrandChild
• Make sure that the Navigated event of the Child is on the correct record when the Requery is called for the grandchild.
• Make sure that you actually have records for the grandchild (I have done that before )