ChildObjects / ReadOnly in Datagrid - a little assistance/clarification required.

gajit posted on Thursday, October 12, 2006

Hi guys,

I need a little guidance or clarification on how child objects are exposed in a UI - and whether I can achieve what I desire or how others may have approached this.

I am creating a dialogue, that is based on parent/child(ren) table relationship. I store dialog results in a 'selection criteria' table and pass these off to a process...

To simplify, let's say I have a parent table "criteria" that has two criteria (columns) - salesrep and orderyear (and a PK column), and I also have a child table - "criteria_states" that has a list of states that should be included in the selection. This table has columns; statecode, is_selected (bool), (and parent key column to make the relationship)

My thinking was that, when creating my selection object, I could populate the selection_state with all states and set the is_selected value to true - I could populate a datagrid on my selection criteria dialogue, with 2 columns - state and is_selected - allowing the user to select/unselect the desired states in the selection screen.

But my datagrid with the child objects is "readonly" - and havign read a number of threads with similar issues, I understand how this is by design.

I do however disagree that the child objects shouldn't be edited in the same dialogue as the root...

Is it POSSIBLE to have a group of editable child objects in the same collection as the root - or does anyone have a better strategy that they have used to popluate/update this type of child object?

Any help/assistance/clarification would be much appreciated...

Thanks,

gaj.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RockfordLhotka replied on Thursday, October 12, 2006

It is absolutely possible to have a dialog/form where both the parent and child data is edited - look at the PTWin project, and specifically the ProjectEdit form. You can see there where the Project object and its child objects are edited on the same form.

gajit replied on Thursday, October 12, 2006

Thanks Rocky,

 

You know - I THOUGHT I'd come across it - but I've gone so far down in mhy development that I'd forgotten... and somehow inherited what appear to be readonly collections ...

I'll 'reeducate' myself.

Thanks,

g.