Create 2D array of custom objects from XML

Question

I have the following XML, and I'm trying to get into an array using LINQ:

<doc>
  <rows>
    <cols>
      <a>value</a>
      <b>value</b>
      <c>value</c>
      <d>value</d>
    </cols>
    // multiple col elements
 </rows>
 // multiple rows elements, each has a set of col elements
</doc>
// single doc (root) element

using this code:

ObjectType[][] var = (
from e in XDocument.Load("Test.xml").Root.Elements()
select (
from cols in e.Elements("cols")
select new ObjectType
{
a = (int)e.Element("a"),
b = (int)e.Element("b"),
c = (int)e.Element("c"),
d = (int)e.Element("d")
}).ToArray()).ToArray();

Where ObjectType is a simple structure of ints: a, b, c, and d. The XML looks properly-formatted, but I keep getting System.ArgumentNullException. From what I can make out in the debugger, it doesn't get past the first element.

How is my brain failing me on this one?

Saffar · Accepted Answer · 2014-01-26 04:53:00Z

2

it should be like this

a = (int)cols.Element("a"),
b = (int)cols.Element("b"),
c = (int)cols.Element("c"),
d = (int)cols.Element("d")

use cols instead of e, e is for rows. also you have to change the word value in your xml to integer numbers

answered Jan 26, 2014 at 4:53

Saffar

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