Question

my xml looks like this:

        <root>
            <x a1 = "abc">
                <y a2 = "def"> 
                    <z value1 = 5 value2 = 10 value3 = 15/>             
                </y>
            </x>
        </root>

my main code:

static void Main(string[] args)
{
    int value;
    IEnumerable<XElement> xs = from x in xDoc.Descendants("x")
                               where (string)x.Attribute("a1") == "abc"
                               select x;
    IEnumerable<XElement> ys = from y in xs.Descendants("y")
                               where (string)y.Attribute("a2") == "def"
                               select time;
    IEnumerable<XElement> zs = from z in ys.Descendants("z")
                               where z.Attribute == value1
                               select z;
}

I am trying to set int value to value 1, 2 or 3 of node z depending on a certain condition. My problem occurs when i try to filter the required value in node z. could someone explain how I could assign the matching value of node z to int value.

Answer 1

If I understand you correctly, you want to select some element of z node:

string value = "value1";

var query = xDoc.Descendants("x")
                .Where(x => (string)x.Attribute("a1") == "abc")
                .Descendants("y")
                .Where(y => (string)y.Attribute("a2") == "def")
                .Descendants("z")
                .Select(z => (string)z.Element(value))
                .Select(s => Int32.Parse(s.Replace("\"", "")));

Result of query – IEnumerable<int>. You can apply Single of First if you sure that there will be one value, or you need first one.

Also I don’t understand why you keep values as "5" instead of simple 5.