How to write Xpath to extract total Quantity in C#

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Hi,

I am new in writing Xpath in C# and i am not able to get Sum of Quantity from xml data. i.e i want to get total quantity from multiple lines elements as in one unit of data.

The following xml shows some sample xml data :

XML

 <lines>
 <line>
      <line_no>11</line_no>
      <qty>50</qty>
</line>
<line>
      <line_no>12</line_no>
      <qty>150</qty>
</line>
<line>
      <line_no>13</line_no>
      <qty>100</qty>
</line>
<line>
      <line_no>14</line_no>
      <qty>90</qty>
</line>
<line>
      <line_no>15</line_no>
      <qty>40</qty>
</line>
</lines>

for the above code i have written Xpath like:

C#

int total=SelectSingleNode("/lines/line/qty").Value;

By this i am getting only first line element quantity but i need to get all lines quantity i think here i need to Loop the lines of data if yes please help me how to write the xpath query.

Thanks,

Raghu.

Posted 17-Sep-12 21:02pm

Madhugundi

Updated 17-Sep-12 21:11pm

Zoltán Zörgő

v2

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**Zoltán Zörgő** · Answer 1 · 2012-09-17T21:10:00

Solution 1

Have you tried sum(//qty) expression?

Posted 17-Sep-12 21:10pm

Zoltán Zörgő

Kuthuparakkal · Answer 2 · 2012-09-17T21:27:00

Solution 2

C#

//Load the document
XPathDocument xDoc=new XPathDocument("XMLFilePath"));
//Create XPathNavigator
System.Xml.XPath.XPathNavigator nav = xDoc.CreateNavigator();
//Use Evaluate method to get typed result of evaluated expressions
//Here we get it as string
string sum=nav.Evaluate("sum(/lines/line/qty)").ToString();

Posted 17-Sep-12 21:27pm

Kuthuparakkal

Comments

Madhugundi 18-Sep-12 3:47am

Thank you i got solution from ur code.

Kuthuparakkal 18-Sep-12 4:02am

You're welcome!
plz mark answer if it helps!