ComboBox in a Listview, with dynamic bindings

Question

Hi Guys,

I need to embed a ComboBox with a ListView (GridView).

Basically I need to display a ListView/GridView, which has three columns: Name, Operator, Value. I need to bind the ListView to a collection of objects I get from DB. Each row is a class object, which can be simplified as:

public class Attribute

{

public string Name{get;set;}

public string Operator{get;set;}

public string Value{get;set;}

}

A sample of a collection of Attribute objects can be:

("ServiceType", ...) ("Content", ...) ("Status", ...)

The first column is just a simple TextBlock showing the name (ServiceType, Content, Status or etc.). Based on the Name column for each row, I need to populate the "Value" column for that row with a ComboBox, but showing specific items that are suitable for the Name. 

For example, if the Name for a row is "ServiceType", I need to populate the Combobox for that row with the following items:

"sour", "sweet" and "unsure". 

If the name for the second row is "Status", I need to poputlate the ComboBox for the second row with the following items:

"new", "reconditioned", "unsure", and "used".

The idea is the user can select one of the pre-defined value from the ComboBox. Such as "sweet" for the ServiceType, and "reconditioned" for the Status. And I can build a SQL query based on what the user selects.

How do I do this in WPF?

Currently I have the "inner" ComboBox binds to a CollectionViewSource defined in the <Window.Resources>, and at the ListView.SelectionChange event, I dynamically update CollectionViewSource's Source property. 

This works and the ComboBox shows the correct items. But when I switch from one list item to the other, say, from ServiceType to Status, the previously selected item is lost, this is because I guess I only have one CollectionViewSource, and I have multiple ComboBox binding to it.

How do I dynamically create multiple CollectionViewSource and have the ComboBox bind to different ones?

Thanks!

Wenbiao