Silverlight – Knowledgebase

How to list all entity names / table names from your Entity Framework model in Silverlight 4 and RIA services

25 October, 2011 Roel van Lisdonk 0 Comments 1 category

If you want to list all entity names / table names from your Entity Framework model (*.edmx) in Silverlight 4, use a RIA Invoke operation: using System; using System.Collections.Generic; using System.Linq; using System.Web; using

Solving: Add and delete buttons on the DataForm are disabled when using an List<Entity> as ItemSoure

25 October, 2011 Roel van Lisdonk 0 Comments 1 category

When you bind the DataForm.ItemSource directly to an entity set returned from your RIA DomainService, the DataForm add and delete buttons are disabled. This is caused by the implementation in RIA Services of the

Solving: DisplayName not showing in a DataForm in Silverlight 4 by using data annotations on a metadata class.

24 October, 2011 Roel van Lisdonk 0 Comments 1 category

I was trying to change the displayname of a field in a dataform by placing the DisplayName attribute on the property in the metadata class. This will not work instead you must use the [Display(Name=

Solving: The attachable property ‘Behaviors’ was not found in type ‘Interaction’

11 October, 2011 Roel van Lisdonk 0 Comments 1 category

I was getting the error: The attachable property ‘Behaviors’ was not found in type ‘Interaction’. This was generated by a missing reference to the "System.Windows.Interactivity" assembly. You can download the assembly at http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=3062

How to run and debug silverlight unittests inside Microsoft Visual Studio 2010

29 September, 2011 Roel van Lisdonk 0 Comments 1 category

The Microsoft Test project template in Microsoft Visual Studio 2010 does not support adding a reference to a Silverlight class library. To unittest a function in a Silverlight class library you can follow the steps

How to resolve: ListBox UI does not update (refresh) on WCF .NET Ria Services domaincontext async call in Silverlight 3

10 March, 2010 Roel van Lisdonk 0 Comments 1 category

When you are calling a function on a WCF .NET RIA service, the completed eventhandler will take you back to the UI thread, but if you are binding the ListBox to a List<….> the UI

How to sett the RootVisual multiple times from code in Silverlight 3

9 March, 2010 Roel van Lisdonk 0 Comments 1 category

MSDN explains the RootVisual can only be set one time from code: You can set the value of the RootVisual property only one time from code, although you get its value any number of times.

Get the DomainService (LINQ to SQL) to load child entities with .NET RIA Services in Silverlight 3

8 March, 2010 Roel van Lisdonk 5 Comments 1 category

If you have a table with related tables then you can get the child entries by editing the DomainService and the metadata: Add the include attribute ([Include()]) to the property containing the child table reference

Entities not loaded after domainContext.Load(domainContext.GetUsers) in WCF RIA service

8 March, 2010 Roel van Lisdonk 0 Comments 1 category

If you use LINQ to SQL and you’re entities are not loaded after you call a GetQuery on the DomainContext, you probably did not use a callback. TTSDomainContext context = new TTSDomainContext(); LoadOperation op =

How to solve: Load operation failed for query ‘Login’ Invalid column name ‘Email’ (Silverlight 3 .NET RIA Services)

8 March, 2010 Roel van Lisdonk 0 Comments 1 category

In my case it was a database – “LINQ to SQL” out of sync issue, after updating the database and the “LINQ to SQL” model the issue was resolved.

Tag: Silverlight