This course will introduce you to SQL Server Core 2016, as well as teach you about SSMS, data tools, installation, server configuration, using Management Studio, and writing and executing queries.
after the second time around where there is data on the listbox I get an error saying "Object reference not set to an instance of an object." so in my effort to trying to solve the issue I have added a loop to remove items like this:
If rlcExportPrevious.Items.Count > 0 Then rlcExportPrevious.Items.Clear() End If
this works until I get to the last record and throws the same error. If I use the word new as it suggests I lose the event SelectedIndexChanged and I need to keep that functionality. How do I solve my issue?
While rlcExportPrevious.Items.Count > 0 rlcExportPrevious.Items.RemoveAt(rlcExportPrevious.Items.Count - 1) End While