getting an error message
Can anyone help. I have recurring gigs which I just change by changing the date after each one has passed. But if I go into past gigs now the information doesn't show up just the error message below and a shed load of writing after. I'm taking a guess that the 'drpCalYear' means because we've gone from 2016 to 2017 it is no longer possible to edit any gigs from last year ? If that's the case hey ho I'll write them out again just thought I'd mention in case it was a bigger issue
'drpCalYear' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value