Infragistics WebHierarchicalDataGrid offers a nice ability to custom load-on-demand data via its ContainerGridDataBinding event. It is very useful during paging or displaying grid children – you can make a DB call and provide data a just needed for current page or child. But it has a drawback – if you need to programmaticaly sort the […]
Infragistics WebHierarchicalDataGrid has a neat client-side built-in function get_scrollTop() – it is used if at any point you need to retrieve current vertical scroll position of the grid (e.g. to use it in your own calculations to display something at a specific position on the grid – tooltip, help, additional info etc.) Unfortunately the function […]
Learn how to fix Infragistics WebHierarchicalDataGrid errors “Async request failed” including “Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request” and “Object Reference not set”
If you’re using Infragistics WebHierarchicalDataGrid and getting “DataKeyField is invalid” error after assigning DataKeyFields property for the root level: and trying some data manipulation (like deleting rows, binding data etc.), try using GridView property of the grid instead: The first method used to work, but somewhere around 2011 release of NetAdvantage it broke.
If after upgrading to a new version of Infragistics NetAdvantage you suddenly found your WHDG sprouting an extra blank row on top: most likely it’s because grid’s ItemCssClass property is used. In theory (at least according to ever so verbose documentation) it should define what grid’s cells look like. In practice it have no effect […]
Upgrading 3rd party library to a new version is bound to have problems and Infragistics is no exception. In my case I was upgrading NetAdvantage for ASP.NET from version 2009.2 to to 20011.1 and right away WebHierarchicalDataGrid started to crash client-side. If ScriptManager was in debug mode I’d get error: Microsoft JScript runtime error: Sys.ArgumentUndefinedException: […]
I have been using WebHierarchicalDataGrid with manual load on demand bands with a pretty good success until I hit this snag. The WHDG has correctly displayed HTML fields before, but this time a column with HTML data (an HREF link to be precise) is needed as one of the grid’s DataKeyFields to provide uniqueness of […]
If you need to get/set value of a specific cell in WHDG Row (which is of GridRecord or ContainerGridRecord type) the only way to do it is by Cell index e.g. But what if you don’t know cell/column index and only column name is known? Then the trick is to find the index first. Consider […]
Working with row selection in Infragistics WebHierarchicalDataGrid can be complicated since it maintains independent row selection collection for each row island and basic operations (select/unselect) aren’t that obvious. I put together a few functions to make it a little bit easier. This first function is very basic, it returns total count of selected rows across […]
In the previous post I described a method to automatically resize columns for Infragistics grid control. It works (most of the times) for flat WebDataGrid, but if you try same approach with WebHierarchicalDataGrid – it will fail for child bands. Lets review what we’re trying to accomplish. A grid column should automatically resize to whichever […]