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The pre- and post-action event handlers are also quite helpful when debugging. These controls allow page developers to declaratively access and modify data without writing any code to perform the data access. This article is one in a series of articles on ASP. Regardless, the value of the parameter can be examined and modified (if needed) in the event handler. To programmatically assign this input parameter value in the Object Data Source's Protected Sub Categories Data Source_Selecting(By Val sender As Object, By Val e As System. The Object Data Source's post-action event handler is also passed the value returned by the invoked object library method (if any).
For more information on handling exceptions in the post-action event using the Object Data Source, check out Handling BLL- and DAL-Level Exceptions in an ASP. For an example using the Sql Data Source control, check out Fredrik Normen's blog, specifically Handle the Data Source Control Exception on Your Own.
I need to do it in UPDATED not in UPDATING because in updating I can't get some events.
How do you guys update let's say for example a Form View with an Object Data Source source.
The page just posts back with the Edit Item Template controls still showing.
I can put breakpoints all over the place, but the trail stops at the end of Things_Updating. I can't find a way to cancel the update the update without closing the row from the edit event.