I have an Xml which goes like
<Node1>
<Node2 name = "A" >
<Node3>
<ChildNode>blah blah</ChildNode>
</Node3>
</Node2>
<Node2 name = "B" >
<Node3>
<ChildNode></ChildNode>
</Node3>
</Node2>
</Node1>
My requirement is to find the last node which is "Not None" here..
I tried '/Node1/Node2[ last() ]//Node3ChildNode/text( )' but here the last node is empty so want to default to the previous node.
What would be the best way to do that via Xpath ?
Select the last Node 3 with not empty ChildNode
(/Node1/Node2[Node3/ChildNode/text()])[last()]/Node3/ChildNode/text()
Or select the last one from all not empty ChildNode
(/Node1/Node2/Node3/ChildNode/text())[last()]
Related
I have structure that looks something like this
<p>
<br>
<b>Text to fetch </b>
<br>
"Some random text"
<b>Text not to fetch</b>
I need XPath that will allow me to fetch following sibling of the br element only if there is no text between br element and his following sibling.
If I do something like this
//br/following-sibling::b/text()[1]
It will fetch both Text to fetch and Text not to fetch, while I only need Text to fetch.
Another possible XPath :
//br/following-sibling::node()[normalize-space()][1][self::b]/text()
brief explanation:
//br/following-sibling::node(): find all nodes that is following-sibling of br element, where the nodes are..
[normalize-space()]: not empty (whitespace only), then..
[1]: for each br found, take only the first of such node, then..
[self::b]: check if the node is a b element, then if it is a b element..
/text(): return text node that is child of the b element
Try below XPath to avoid matching b nodes with preceding sibling text:
//br/following-sibling::b[not(preceding-sibling::text()[1][normalize-space()])]/text()
I need to extract all children which have nodes with some text. Html structure might be the following:
<div>
<div>
A
</div>
<p>
<b>A</b>
</p>
<span>
B
</span>
</div>
I need to extract child nodes which have "A" text. It should return div and p nodes
I tried the following xpaths:
./*/*[contains(text(), 'A')]
./*/*[./*[contains(text(), 'A')]]
but the first one returns only div with "A" text and the second one returns only p with "A" text
Is it possible to construct xpath which will return both children?
Node containing "A" text might be at any level in the child node
If you need XPath that returns both child nodes, try to use
./*/*[contains(., "A")]
I suspect contains() is wrong here, unless you really want to select a node whose value is "HAT" as well as one whose value is "A".
Try
*/*[normalize-space(.)='A']
I've to made some exercices but
I don't really understand the difference between two similar path
I've the tree :
<b>
<t></t>
<a>
<n></n>
<p></p>
<p></p>
</a>
<a>
<n></n>
<p></p>
</a>
<a></a>
</b>
And we expect that each final tag contain one text node.
I've to explain the difference between //a//text() and //a/text()
I see that //a//text() return all text nodes and it seems legit,
but why //a/text() return the last "a node" -> text node ?
Another question :
why //p[1] return for each "a node", the first "p" child node ?
-> I've two results
<b>
<t></t>
<a>
<n></n>
**<p></p>**
<p></p>
</a>
<a>
<n></n>
**<p></p>**
</a>
<a></a>
</b>
Why the answer is not the first "p" node for the whole document ?
Thanks for all !
Difference between 1: //a//text() and 2: //a/text()
Let's break it down: //a selects all a elements, no matter where they are in the document. Suppose you have /a, that would select all root a elements.
If the / path expression comes after another element in an XPath expression, it will select elements directly descending the element before that in the XPath expression (ie child elements).
If the // path expression comes after another element in an XPath expression, it will select all elements that are descendant of the previous element, no matter where they are under the previous element.
Applying to your two XPath expressions:
//a//text(): Select all a elements no matter where they are in the document, and for those elements select text() no matter where they are under the a elements selected.
//a/text(): Select all a elements no matter where they are in the document, and for those elements select any direct descendant text().
Why //p[1] returns for each "a node", the first "p" child node?
Suppose you were to write //a/p[1], this would select the first p child element of any a element anywhere in the document. By writing //p[1] you are omitting an explicit parent element, but the predicate still selects the first child element of any parent the p element has.
In this case there are two parent a elements, for which the first p child element is selected.
It would be good to search for a good introduction to XPath on your favorite search engine. I've always found this one from w3schools.com to be a good one.
I'm looking for an xpath that will give me a child node only if the parent node doesn't equal a specific value. For example if I have an xml like the following:
<Grandpa><Dad><Son /></Dad><Son /></Grandpa>
I want to return the Son element outside the Dad element.
This Xpath selects those Son elements whose parent element is not named Dad:
//Son[local-name(..) != 'Dad']
So, applied to this XML:
<Grandpa><Dad><Son a="1"/></Dad><Son a="2"/></Grandpa>
It will select:
<Son a="2"/>
I have an XML below -
<document>
<node name="Node 0 Text here" ID="01" >aa
</node>
<node name="Node 1 Text here" ID="11">bb
</node>
<node name="Node 2 Text here" ID="12">cc
</node>
<node name="Node 3 Text here" ID="22">dd
</node>
<node name="Node 4 Text here" ID="23">ee
</node>
</document>
I need to search content in a particular node within this XML.
If search keyword does not exist in that node, then I have to begin searching from the next node of current node, you could say sibling.
If that keyword does not exist in all the nodes after the current node then it should begin search from start..
I have to achieve this in my code behind- dotnet class. I have used -
XmlNodeList xmlNodes = xd.SelectNodes("//12/following-sibling::*");
Here, 12 refers to nodeid of the current node,which will be passed as an argument. But I am getting error.
Any help is appreciated.
I need to search content in a particular node within this XML
to get a node matching by its content, the XPath is:
node[contains(text(),'aa')]
This will return the first node for example and any other node whose content text contains aa.
If search keyword does not exist in that node, then I have to begin searching from the next node of current node, you could say sibling. If that keyword does not exist in all the nodes after the current node then it should begin search from start.
This sentence does not make much sense to XPath. The expression above will return all nodes matching the keyword. If you want the first matched node you can get it from the XmlNodeList after or directly from the XPath expression changing it to:
node[contains(text(),'aa')][1]
12 refers to nodeid of the current node,which will be passed as an argument
That's not correct. To select the node by id you should use, for instance:
node[#id=12]/text()
This will get the content of the node with id=12.
Use:
(/*/node[ID='12']/following-sibling::*[contains(.,$pattern)][1]
|
/*/node[ID='12']/preceding-sibling::*[contains(.,$pattern)][1]
)
[last()]
This expression selects the last from the two wanted selections -- the first of the following siblings that contains the value of $pattern and the first of the preceding siblings that contains the value of $pattern.
You need to substitute $pattern with the exact value you want to serch for.