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Fixing the ‘Telerik.WebControls.GridInsertionObject does not contain a property’ Error
I really like working with the Telerik ASP.NET AJAX controls. However, I keep forgetting about a problem in the RadGrid that occurs when trying to add a new record using EntityDataSource. If there aren’t any records yet, and you click Add Record, you...
Posted 02 October 2009 09:01 AM by Ken Cox [MVP] | with no comments
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DropDownList Lookups Failing Due to SQL Char DataType
Here’s today’s episode of “Losing Time on Something Dumb”… In my ASP.NET 3.5 project (using Telerik’s AJAX controls) I filled a RadComboBox with Items and needed to set the selected item to the current value of the object (I’m using Entity Framework)...
Posted 30 September 2009 10:34 AM by Ken Cox [MVP] | with no comments
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Fixing the System.Data.UpdateException – DefiningQuery and no <InsertFunction> Error
Here’s another in my never-ending series of fixes for dumb mistakes. In this episode we lose time with an Entity Framework error. Here’s the error message: System.Data.UpdateException was unhandled by user code Message="Unable to update the EntitySet...
Posted 09 September 2009 06:56 PM by Ken Cox [MVP] | 8 comment(s)
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Fixing EntityDataSourceWrapper Error in EF (VB Version)
I lost a lot of time today on this error: ‘EntityDataSourceWrapper' does not contain a property with the name …' The project is ASP.NET 3.5 using Entity Framework and VB. I’m using the Telerik RadControls for ASP.NET AJAX (a sweet suite!). In my app,...
Posted 16 July 2009 08:43 PM by Ken Cox [MVP] | 4 comment(s)
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Silverlight 2 Data Form - Episode 6: "C" is for Create
In this episode, you build a XAML form that acts like a popup, modal window. The form validates user input with WCF callbacks to ensure that the customer ID is unique. By the end of the episode, you're able to add a customer to the NorthWind database...
Posted 28 January 2009 10:07 PM by Ken Cox [MVP] | 5 comment(s)
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Learning CRUD and Data Forms in Silverlight 2 (Screencasts)
Not much stuck with me from years of Latin in high school, but the motto “Docendo discimus” has always served me well. “We learn by teaching” expresses one of my motivations for writing tutorials and creating presentations on the latest Microsoft technologies...
Posted 19 January 2009 11:48 AM by Ken Cox [MVP] | 1 comment(s)
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