DevForce Community Forum : DataForm Lookup Fields

DevForce Community Forum : DataForm Lookup Fields http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2009 : DataForm Lookup Fields Tue, 28 Apr 2026 20:39:41 -700 Tue, 29 Sep 2009 13:10:29 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=1199 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ DataForm Lookup Fields : Greg, yeah, I'm definitely... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5527#5527 Author: pholloway
Subject: 1199
Posted: 29-Sep-2009 at 1:10pm

Greg, yeah, I'm definitely looking for "safest and easiest" at this point. Coming from a background of using stored procedures to do the heavy lifting, that model makes the most conceptual sense to me. Thanks!

]]> Tue, 29 Sep 2009 13:10:29 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5527#5527 DataForm Lookup Fields : Originally posted by phollowayif... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5524#5524 Author: GregD
Subject: 1199
Posted: 29-Sep-2009 at 12:54pm

Originally posted by pholloway

if you wanted to persist a changed Order record, is it a simple matter of calling Save against the entity manager -- in other words, is the FK relationship with Customer handled automagically, or do we need to do some extra stuff first?

That's all under your control. The safest -- and easiest -- thing to do is always to save all changes in your cache (orders, order line items, customers, products, everything) at the same time. That way, you don't accidentally save just part of a conceptual entity that spans more than one entity type (like an Order and its line items) and thus get data integrity issues.

On the other hand, there are use cases for saving only part of the cache, from a single entity on up, and you have the mechanisms to control exactly what gets submitted for a save. Under those circumstances, you have to take responsibility yourself to ensure that you don't create data integrity problems.
]]> Tue, 29 Sep 2009 12:54:44 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5524#5524 DataForm Lookup Fields : Thanks Greg, this is helpful.... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5523#5523 Author: pholloway
Subject: 1199
Posted: 29-Sep-2009 at 10:43am

Thanks Greg, this is helpful. I see that you are loading Customer records into an ObservableCollection of Customers and binding that to the combobox. Now if you wanted to persist a changed Order record, is it a simple matter of calling Save against the entity manager -- in other words, is the FK relationship with Customer handled automagically, or do we need to do some extra stuff first?

Thanks again.]]> Tue, 29 Sep 2009 10:43:41 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5523#5523 DataForm Lookup Fields : I wired up a ComboBox in the DataGrid... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5484#5484 Author: GregD
Subject: 1199
Posted: 25-Sep-2009 at 1:52pm

I wired up a ComboBox in the DataGrid in MainFormIntermediate in the solution for the FourSimpleSteps tutorial. It's bound to an Order's Customer, and displays the complete list of Customers to choose from.

The ComboBox there is just an ordinary one, used inside a DataEditingTemplate within the DataGrid column, so I believe the wiring would be similar used in a DataForm, or stand-alone.
]]> Fri, 25 Sep 2009 13:52:22 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5484#5484 DataForm Lookup Fields : Not using a dataform -- What... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5433#5433 Author: pholloway
Subject: 1199
Posted: 18-Sep-2009 at 3:08pm

Not using a dataform --

What is the best quick way to make a Silverlight combo box do something actually useful - like display items from a lookup table, set the selected item to be the value associated with a customer record, and save the selected item's value back to the DB, for example?

Surely there is an easy way to do this?

Thanks.

]]> Fri, 18 Sep 2009 15:08:03 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5433#5433 DataForm Lookup Fields : @antalakas - Agreed. It will be... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5238#5238 Author: WardBell
Subject: 1199
Posted: 25-Aug-2009 at 2:32am

@antalakas - Agreed. It will be in the next release of ME and PE (PrismExplorer) ... which will coincide with our DevForce 5.2.2 release coming up next week.]]> Tue, 25 Aug 2009 02:32:44 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5238#5238 DataForm Lookup Fields : Ward, thank you for your attention.... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5237#5237 Author: antalakas
Subject: 1199
Posted: 25-Aug-2009 at 1:39am

Ward, thank you for your attention. I noticed this article last night after returning for vacation and i think it would be great to include DataContextProxy class in PRISM explorer.

A]]> Tue, 25 Aug 2009 01:39:06 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5237#5237 DataForm Lookup Fields : It's coming. It's not... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5235#5235 Author: WardBell
Subject: 1199
Posted: 24-Aug-2009 at 2:52pm

It's coming. It's not a DevForce problem per se; more of a Silverlight WTF. But we'll be giving some guidance.

Meanwhile, for inspiration look at Explorer.FormViewModelHolder in ModelExplorer and PrismExplorer. It addresses the same problem of needing access to the ViewModel of an outer control when you're inside a nested control and something changed the DataContext on the way through those control layers.

Dan Wahlin had an improved approach to the one cited earlier; read about it here http://weblogs.asp.net/dwahlin/archive/2009/08/20/creating-a-silverlight-datacontext-proxy-to-simplify-data-binding-in-nested-controls.aspx which deals specifically with your ComboBox issue.

The next version of FormViewModelHolder will inherit from Dan's DataContextProxy, eliminating some of my hook up code.

]]> Mon, 24 Aug 2009 14:52:24 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5235#5235 DataForm Lookup Fields : I'm also looking for a clear... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5127#5127 Author: bigfish
Subject: 1199
Posted: 06-Aug-2009 at 5:58pm

I'm also looking for a clear example on how to do this please.

]]> Thu, 06 Aug 2009 17:58:36 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=5127#5127 DataForm Lookup Fields : Thank you Sir! http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4353#4353 Author: BenHayat
Subject: 1199
Posted: 08-Apr-2009 at 1:14pm

Thank you Sir!]]> Wed, 08 Apr 2009 13:14:24 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4353#4353 DataForm Lookup Fields : It's on our list now. Thanks! ... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4352#4352 Author: ting
Subject: 1199
Posted: 08-Apr-2009 at 12:24pm

It's on our list now. Thanks!

]]> Wed, 08 Apr 2009 12:24:10 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4352#4352 DataForm Lookup Fields : I'll add my vote to add some... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4314#4314 Author: BenHayat
Subject: 1199
Posted: 06-Apr-2009 at 7:13am

I'll add my vote to add some sample how to populate combobox at runtime with DevForce!
Thanks!
]]> Mon, 06 Apr 2009 07:13:26 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4314#4314 DataForm Lookup Fields : Is it possible to use a Dataformwith... http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4309#4309 Author: antalakas
Subject: 1199
Posted: 05-Apr-2009 at 4:31pm

Is it possible to use a Dataform with Devforce SL and create look-up comboboxes in the dataform?

I need a similar functionality like the one described here:

http://www.microapplications.com/blog/archive/2009/03/19/327.aspx

Thank you

Edited by antalakas - 05-Apr-2009 at 4:33pm]]> Sun, 05 Apr 2009 16:31:08 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1199&PID=4309#4309