So on your ASP.Net samples website you have the "WebHierarchicalDataGrid -Multiple Bands Hierarchy" example, which I've used as the starting point for one of my own projects.

However, there seems to be an easily reproducible problem with your sample (and with my project that's is based on it):

1.  Expand and collapse the row with "Employee ID" of 1 about four times.  End with the row collapsed.

2.  Expand and collapse the row with "Employee ID" of 4 about four times.  End with the row collapsed.

3.  Return to row 1.  Expand it.  Note that it thinks for a bit, and then pops out to the expanded state.

4. Try to collapse row 1.  Note that it will not collapse.

So, what would be the best way to get around this problem?

Thanks!