March 2010 – Page 4 – Knowledgebase

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.

Get only the changed data from the database with Linq to SQL and .NET RIA Services in Silverlight 3

8 March, 2010 Roel van Lisdonk 0 Comments 1 category

If you cache data in you’re Silverlight 3 application and want to sync (get the latest data from the database) the entities, you can use the Load function with the LoadBehavior.RefreshCurrent option. This will get

Implementing custom authentication with .NET RIA Services and Silverlight 3, by using a Custom Membership Provider

8 March, 2010 Roel van Lisdonk 2 Comments 1 category

I am creating a Silverlight 3 application that must work with a database that is used by a legacy ASP .net 1.0 system. The database contains tables for users and roles. The Silverlight 3 application

Microsoft Windows 7 and pressing single or double quotes on keyboard

5 March, 2010 Roel van Lisdonk 6 Comments 1 category

I installed Microsoft Windows 7 with the keyboard layout English (United States) Keyboard US When you press a single or double quote with this keyboard layout, the quotes will only appear after pressing

InfoPath 2010 New Record action on webpart does not reset drop-down list box

4 March, 2010 Roel van Lisdonk 0 Comments 0 categories

If you have two lists in Microsoft SharePoint 2010, [Hardwareitems] and [Hardwaregroups] and the list [Hardwareitems] contains a “foreign key” to the list [Hardwaregroups], you can customize the form of the [Hardwareitems] list to contain

How to prevent SharePoint from showing repetitive login boxes when opening MS office documents

2 March, 2010 Roel van Lisdonk 0 Comments 0 categories

All steps needed to prevent Microsoft SharePoint from asking for credentials are described on: http://sharepointsolutions.blogspot.com/2008/07/how-do-i-make-our-sharepoint-site-stop.html

Making the Silverlight 3 .NET RIA Services Business Application, authenticate to SQL Server and not SQLServerExpress

1 March, 2010 Roel van Lisdonk 0 Comments 1 category

If you’re are using SQL Server Developer edition to develop a Silverlight 3 .NET RIA Services Business Application you might encounter an exception during login: Load operation failed for query ‘Login’. at System.Web.DomainServices.ReflectionDomainServiceDescriptionProvider.ReflectionDomainOperationEntry.Invoke(DomainService domainService, Object[]

Remove character from a string with a byte length greater then 2 in C#

1 March, 2010 Roel van Lisdonk 0 Comments 0 categories

Some application can’t work with characters larger then 2 bytes. You can replace these character by a question mark ‘?’ with the following code: /// <summary> /// Replace all characters with more then 2 bytes

Month: March 2010