CODEWITHSUNDEEP
c#xmlxpath
IordanTanev
IordanTanev

Reputation: 6240

XmlNode.SelectSingleNode returns element outside current?

my problem is like this. Let's say i have xml like this

<root>
  <child Name = "child1">
    <element1>Value1</element1>
    <element2>Value2</element2>
  </child>
  <child Name = "child2">
    <element1>Value1</element1>
    <element2>Value2</element2>
    <element3>Value3</element3>
  </child>
</root>

I have a method that gets as parameter XmlNode "node". Lets say "node" has value "child1" Then i try like this:

node.SelectSingleNode( "//element3" );

The problem is this code returns element3 from "child2". What i want is if there is no child "element3" of "node" to return null so i add it by hand.
Best Regards,
Iordand

Upvotes: 21

Views: 18949

Answers (4)

kazim
kazim

Reputation: 2191

The following work perfect when i want to run xpath on the specified node.

XmlNodeList nodes = xmlDoc.SelectNodes(".//Child");

Upvotes: 12

Alexander Vakrilov
Alexander Vakrilov

Reputation: 1131

the problem here is the XPath expression you are using, try it without the '//'. Like that:

node.SelectSingleNode( "element3" );

Read more here .

Upvotes: 3

taylonr
taylonr

Reputation: 10790

The "//" is a global look up.

What you'll need to do is get a list of all children

XmlNodeList nodes = xmlDoc.SelectNodes("//Child");

loop through that list and do a 

XmlNode node = nodes.SelectSingleNode("element3");

This will return null if it's not there, and will step through every child looking.

Upvotes: 8

Welbog
Welbog

Reputation: 60378

The XPath expression you have isn't what you want.

Replace it with this:

node.SelectSingleNode( "element3" );

And you'll get the result you're looking for.

Upvotes: 25

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