April 2003
Beginner to intermediate
620 pages
21h 48m
English
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Navigating Parent and Child Rows
A DataRow can have both parent and child rows if the
DataTable that it belongs to has a
DataRelation set up with another table. There are
three methods that allow these relationships to be navigated. The
GetParentRow( )
method returns the parent row as a
DataRow object. The GetParentRows( ) method returns the parent rows as an array of
DataRow objects. Both methods require either the
name of the DataRelation or a reference to the
DataRelation as an argument. An optional argument
specifying the DataRowVersion allows control over
the version of the rows returned.
The SetParentRow( )
method changes the parent row for the
DataRow. This method simply takes a reference to
the new parent DataRow and an optional
DataRelation argument, if required.
Finally, the GetChildRows( )
method returns the child rows as an
array of DataRow objects. The name of the
DataRelation or a reference to the
DataRelation is required as an argument. An
optional argument specifying the DataRowVersion
allows control over the version of rows returned.
Navigating parent and child rows is explored in detail in Chapter 11.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.