Binding DataGrid to an hierarchy of objects - problem with Styles at the bottom of the hierarchy - Article 39 - go-pugleaf

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Binding DataGrid to an hierarchy of objects - problem with Styles at the bottom of the hierarchy

#39

From: Terentius Neo
Date: Wed, 31 Aug 2005 16:27

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I have a DataGrid binded to a custom hierarchy. It is an ArrayList of 
objects. Each object has a public property returning a new ArrayList of 
sublevel objects (which may again have sublevels of their own). All the 
objects are of the same base type.

Everything works fine until there are no objects at the lower level. 
Despite this the link to the sublevel is still shown in the DataGrid. 
Clicking it gives the following error message ("Caption" is a public 
property of linked to a DataGridColumStyle):

"The project encountered unhandled exception class 
System.InvalidOperationException with message
'The 'Caption' DataGridColumnStyle cannot be used because it is not 
associated with a Property or Column in the Datasource"

If I remove the DataGridColumnStyles this does not happen. Also the link 
to the lower level is not shown in the DataGrid unless there really are 
objects at that level.

Could somebody give a hint how to fix this?

Terentius

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