Drop Down, ComboBox bindings and interdependencies
Printed From: IdeaBlade
Category: DevForce
Forum Name: DevForce 2009
Forum Discription: For .NET 3.5
URL: http://www.ideablade.com/forum/forum_posts.asp?TID=1566
Printed Date: 06-Apr-2025 at 5:21pm
Topic: Drop Down, ComboBox bindings and interdependencies
Posted By: manishaudio
Subject: Drop Down, ComboBox bindings and interdependencies
Date Posted: 24-Nov-2009 at 6:27am
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Most of the tutorials I see on Silverlight data binding are very simplistic in nature. I have an application where I have Locations, Buildings, Rooms and Assets. What I am working on now and having some issues with is an Asset Editor screen whereby the choice of a location will drive the building choices, which in turn will drive Room choices. If you good folks could give me some pointers on how to do that, I'd appreciate it. I know that the plumbing is all there in that collections were already nicely generated by the Ideablade entity manager. This may be more of a SL question.
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Replies:
Posted By: GregD
Date Posted: 25-Nov-2009 at 3:14pm
Just affirming that this is a Silverlight and UI-databinding and/or UI-architecture question, not specific to DevForce. Perhaps someone else will jump in with assistance.
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Posted By: jeffk
Date Posted: 26-Nov-2009 at 6:53am
you can use silverlight element binding to link the selection of one combobox to another. for example, here would be the "parent" combobox.
< telerikInput:RadComboBox
x:Name="rcbPartyEmployer"
ItemsSource="{Binding Companies}"
SelectedItem="{Binding SelectedContact.TheContactEmployer, Mode=TwoWay}"
DisplayMemberPath="PartyName" />
and here would be the "child" combobox where it's ItemsSource property is bound to the SelectedItem property of the parent.
< telerikInput:RadComboBox
x:Name="rcbPartyManager"
ItemsSource="{Binding SelectedItem.TheOrganizationContacts, ElementName=rcbPartyEmployer}"
SelectedItem="{Binding SelectedContact.ThePartyManager, Mode=TwoWay}"
DisplayMemberPath="PartyName" />
you will have to decide on how you are going to do the data retrieval to make this work. i found it easier to include the child properties in the query for the parent ItemsSource so you don't have to deal with asyncronous data loading but YMMV.
hope this helps,
jeff
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