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Old October 7th, 2015, 09:51 AM
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Default XPATH escape sequence character & Concat

I need to extract element from a document in case inner text node contains certain sequence of characters.
Ex: Test ' both " quotes"::LGC

So I used concat operator to join the string :
Value[@Name=\"concat(\"Test ' both \",'\" quotes\"::LGC')\"]"

But still SelectSingleNode operator return E-FAIL.

What I am missing here ?
Old October 7th, 2015, 10:21 AM
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I'm afraid your code might have come out a bit garbled.

It looks as if you are using XPath within some programming language where you are writing the XPath expression as a string literal in double quotes, and escaping the double quotes using the conventions of that host language. I assume also that you are using XPath 1.0.

Firstly, let's see what the XPath expression should look like:

Value[@Name=concat("Test ' both ",'" quotes"::LGC')]
Then, to put that in a string literal in your host language (if you haven't got some mechanism like C#'s verbatim string literals), you put a backslash before each quotation mark, and put the whole thing in quotes:

"Value[@Name=concat(\"Test ' both \",'\" quotes\"::LGC')]"
Michael Kay
Author, XSLT 2.0 and XPath 2.0 Programmer\'s Reference
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sandip_ware (October 8th, 2015)
Old October 8th, 2015, 02:07 AM
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Thumbs up

Thanks Michael all your help & it resolve my issue.

Here is C++ code from Steven Engelhardt :

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