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Capture event from HierarchicalDataSource

Posted By:      Posted Date: August 24, 2010    Points: 0   Category :ASP.Net

I have a custom hierarchical data source based on the msdn example (http://msdn.microsoft.com/en-us/library/system.web.ui.hierarchicaldatasourcecontrol.aspx).  An event can be raised in the DataSourceView.  If that occurs, I want to display a message on the web page.

The example is that I have a page with a TreeView control which uses a custom hierarchical datasource.  If the user selects a node that they are not allowed to select, the underlying datasource will throw and error.

I want to capture this and add a message to the page.  The Page_Error event is raised, but there are no eventargs.

Anybody know how to capture such an event? 

An alternative approach, although not quite specific enough, is to set a flag during the datasource load event (indicating the datasource is loading) and test for this flag in the Page_Error routine.

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