We derive a class from a LLBLGen collection (self-servicing). When databinding an object of this class to a DataGrid and deleting the last row through the GUI, we get the following exception: error when commiting the row to the original datastore - specified argument was out of the range of valid values - parameter name 'index' was out of range.

Any ideas what's wrong? We do not have this issue with collections not derived from a LLBLGen collection.

Which grid are you using? Which version of llblgen pro are you using? (i.e. latest version, or an older version?) Silly question: does it occur always or just with the last row?

Also, do you refresh the grid when an event is fired from the collection?

The LLBLGen version we are using is 1.0.2004.1. We get the exception only when deleting the last row. We do not handle any events since we assume that the collection takes care of refreshing the grid. Is this assumption incorrect?

vanaeken wrote:

The LLBLGen version we are using is 1.0.2004.1. We get the exception only when deleting the last row. We do not handle any events since we assume that the collection takes care of refreshing the grid. Is this assumption incorrect?

It should, but there were some issues with older versions of 1.0.2004.1 and ListChanged. The last version of 1.0.2004.1 runtimes are available on the website still, in the runtime libraries section.

I'll see if I can reproduce it here with 1.0.2004.2.

The latest runtime of 1.0.2004.1 does not solve the problem, but the latest version of LLBLGen (which we just downloaded) does. Great!

vanaeken wrote:

The latest runtime of 1.0.2004.1 does not solve the problem, but the latest version of LLBLGen (which we just downloaded) does. Great!

Ok!

Yes it's something with the order in which the events are fired. Glad it's solved!