Dynamic Column Creation Problem with Telerik RadGrid

by demtron on Monday, February 02, 2009 10:04 AM

As part of a large eCommerce project, I needed to be able to extend a grid control into a custom control and dynamically add columns.  I needed to change the order of events that determined when and how columns would be added.  After a rather large modification of several hundred lines of code, I found that the grid would throw  errors such as "Cannot create column with the specified type name".  AJAX sorting, filtering, and refreshes threw this error every time after the initial grid display.  This vexed me for over two days until I found the Telerik forums post at http://www.telerik.com/community/forums/aspnet-ajax/grid/dynamic-creation-of-columns.aspx.  The solution was to set the EnableColumnsViewState property of the MasterTableView to false and create the columns on Page.Init or on each Page.Load.

Sometimes, the easiest changes fix the most hair-pulling problems.  :-)


Telerik Control Problems with Intellisense

by demtron on Tuesday, December 16, 2008 05:09 PM

When reinstalling Visual Studio and accessing Web projects that use Telerik RadControls for ASP.Net Ajax, I've found that Intellisense is generally broken for that project and only for Telerik components.  Furthermore, design-time support is also lost.  Here is a list of fixes to try in order to solve this.

  1. Check whether the correct version of the components are in the GAC.
  2. If the site is running on a network share, be sure that the UNC share has fully trust by the .Net framework.  This can be entered at Start -> Control Panel -> Administrative Tools -> Microsoft .NET Framework 2.0 Configuration -> Console Root -> .NET Framework 2.0 Configuration -> My Computer -> Runtime Security Policy -> User -> Code Groups -> All_Code, then add a child code group with file:////\\computername\sharename\* with Full Trust permissions.
  3. Right-click the assembly in the /bin folder of the project and click Update Reference.

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