Xpath Query for known attributes in C#

Question

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Hi All,

I have below XML

XML

<Header>
  <reference>
    <identifier>BatchProcessed</identifier>
    <datetime>2011-08-15T05:12:00+10:00</datetime>
  </reference>
</Header>
<Header>
  <reference>
    <identifier>Running</identifier>
    <datetime>2011-08-15T05:12:00+10:00</datetime>
  </reference>
</Header>

Am trying to xpath query to find out this value "BatchProcessed" in Indentifier.

Please correct me ,this what i have in my query but its not working

//Header[@Identifier='BatchProcessed']<br />

Thanks in Advance

Posted 15-Aug-11 17:32pm

shan1395

Updated 15-Aug-11 18:39pm

Tarun.K.S

v3

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Manfred Rudolf Bihy · Answer 1 · 2011-08-15T19:58:00

Your XPath was almost correct. You'll just have to leave out the @ sign. The @ sign is used to indicate that you are trying to check an attribute. To check for element content all you need to to is omit the @:

XML

//Header/reference[Identifier = "BatchProcessed"]

I'm not sure if the double quotes are really needed, but I put them there just the same as I usually write my XPaths that way. Your XPath will fetch you all Header tags that have child elements reference with sub children identifier with a text value of "BatchProcessed".

Best Regards,

—MRB

senthil sennu · Answer 2 · 2011-08-15T19:32:00

Solution 1

Please refer this link

http://msdn.microsoft.com/en-us/library/ms256086.aspx[^]

OR

You XML format doesn't have root element. Please include the root element

HTML

<root>
   <header>
      <reference>
        <identifier>BatchProcessed</identifier>
        <datetime>2011-08-15T05:12:00+10:00</datetime>
      </reference>
    </header>
    <header>
      <reference>
        <identifier>Running</identifier>
        <datetime>2011-08-15T05:12:00+10:00</datetime>
      </reference>
    </header>
</root>

and use can use C# code to find the particular Node.

C#

XmlDocument oDoc = new XmlDocument();
oDoc.LoadXml(sXML);
XmlNodeList list = oDoc.SelectNodes("//root/Header/reference[identifier = 'BatchProcessed']");

Posted 15-Aug-11 19:32pm

senthil sennu

Updated 15-Aug-11 21:06pm

v2

Comments

shan1395 16-Aug-11 2:06am

i tried something different way ,some how my count always "0" am not sure why
int count = oDoc.SelectNodes("//Header[.//Identifier='BatchProcessed']").Count;
some one guide me on the right way.

senthil sennu 16-Aug-11 2:23am

int count = oDoc.SelectNodes("//root/Header/reference[identifier = 'BatchProcessed']").Count;

Use 'identifier' not 'Identifier', because XML is case sensitive.
The above Xpath is working fine. I check running in my machine. Hope this helps.

Senthil S

shan1395 16-Aug-11 3:00am

Thanks Senthil

finally i used this query to solve the problem

//Identifier[text() = \"BatchProcessed\"]

senthil sennu 16-Aug-11 3:05am

You are welcome. But the above said solution also work.