Implementation of DataAdapter.SelectCommand.Cancel
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Key: DNET-150
URL: http://tracker.firebirdsql.org/browse/DNET-150
Project: .NET Data provider
Issue Type: Improvement
Components: ADO.NET Provider
Affects Versions: 2.1.0
Environment: WinXP
Reporter: Chris Wilson
Assignee: Carlos Guzman Alvarez
When I try to invoke this command, I get an error message that it is not
supported. I trap that of course, and just ignore the cancel, so that's the
workaround. However, I've learned that this command can be very useful.
Consider the problem of a long da.fill operation. Normally you start it and
just have to wait. Even if you run it in a background thread, it has to play
out. With the SelectCommand.Cancel (which works for other providers), I can
handle the datatable rowchanged event and look for a global "cancelled"
variable I set elsewhere; if set I issue the SelectCommand.Cancel method and
I'm good to go.
Strongly recommended.
P.S., the command works for OleDB and SQLServer, but it ignored by SQLite.
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