Merge Two XElements With One Taking Precedence Over The Other To Become Just One Element?
Dec 12, 2009
I have a need to merge two XElements with one taking precedence over the other, to become just one element. The preference here is VB.NET and Linq, but any language would be helpful if it demonstrates how to do this without me coding to manually pick apart and and resolve every single element and attribute.For example, let's say I have two elements. Humor me on them being as different as they are.
1.
<HockeyPlayer height="6.0" hand="left">
<Position>Center</Position>
<Idol>Gordie Howe</Idol>
</HockeyPlayer>
2.
<HockeyPlayer height="5.9" startinglineup="yes">
<Idol confirmed="yes">Wayne Gretzky</Idol>
</HockeyPlayer>
The result of a merge would be
<HockeyPlayer height="6.0" hand="left" startinglineup="yes">
<Position>Center</Position>
<Idol confirmed="yes">Gordie Howe</Idol>
</HockeyPlayer>
Notice a few things: the height attribute value of #1 overrode #2. The hand attribute and value was simply copied over from #1 (it doesn't exist in #2). The startinglineup attribute and value from #2 was copied over (it doesn't exist in #1). The Position element in #1 was copied over (it doesn't exist in #2). The Idol element value in #1 overrides #2, but #2's attribute of confirmed (it doesn't exist in #1) is copied over.Net net, #1 takes precendence over #2 where there is a conflict (meaning both have the same elements and/or attributes) and where there is no conflict, they both copy to the final result.
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