May 2002
Beginner
408 pages
9h 10m
English
Content preview from Sams Teach Yourself ADO.NET in 24 Hours
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The DataSet Relations Collection
The DataSet contains a collection of DataRelation objects named, appropriately enough, DataRelationCollection. This collection stores all DataRelations for the DataTables in your DataSet. There's no practical limit to the number of relationships you can add to a DataSet.
Adding a Relationship Between Two DataTables
Adding a relationship between two DataTables is straightforward. You can simply add a new DataRelation object to the Relations collection of your DataSet as in Listing 4.4. The first argument to the Add() method is the name of the relationship. The second argument contains the parent DataColumn. The third argument contains the child DataColumn of the relationship.
The parent is defined as the column ... |
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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.
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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.