Hello,

I have a dropdown that feed another dropdown (filtered on the first dropdown selection). I have a grid that is filtered on the second dropdown selection.

I added a select parameter on the second dropdown based on the first dropdown selected value.

The 2 dropdown and the grid are linked to 3 LLBLGenDataSources.

I added a select parameter on the grid on the second dropdown selected value.

It work fine on the first callback (everything is perfect on the second time I see my page). The dropdown had been changed with the appropriate data and the grid also have the appropriate data.

But the second callback (third time the same page is displayed) : "KABOOM !!!". I get an exception. (see attchment). Either when I choose a value in the first or the second dropdown.

I tested with microsoft sqlDatasource and everything is fine (parameter into the query).

Do I use it wrong or there is a little bug into the LLBLGenDatasource ???

Wally, I can't see any attachment

Sorry here they are (attachment)

I use latest version of everything.

Unfortunately i cant reproduce the error since you are using DevEx Grid, please try to reproduce it yourself with ms grid and let us know if the problem still persists, otherwise it may be something related with the grid.

I will, Please let me few days, I will test at home. Actually, I'm on a rush at the job and I switch to Microsoft DataSource for simplicity. I will get back soon (probably thursday) with a sample.

Thanks

Also, keep in mind how the devexpress grid works: if you don't enable postbacks for every action, the grid won't refresh.

ok thanks a lot, I will try to find time to test with devexpress grid and microsoft to compare... but in 2 or 3 days. (busy in daytime and evening for the 2 next days).

Thanks for all you good advise !