C# Linq XML Find Specified element

Question

Please could someone post an example of how to check if an element exists in an xml file using linq?

Here is the xml document:

<Database>
 <SMS>
   <Number>"+447528349828"</Number> 
   <Date>"09/06/24</Date> 
   <Time>13:35:01"</Time> 
   <Message>"Stop"</Message> 
</SMS>
 <SMS>
   <Number>"+447528349828"</Number> 
   <Date>"09/06/24</Date> 
   <Time>13:35:01"</Time> 
   <Message>"Stop"</Message> 
 </SMS>
</Database>

I want to be able to specify a number and check if it exists

Jon Skeet · Accepted Answer · 2009-06-29 16:32:12Z

9

How about:

public static bool HasNumber(XDocument doc, string number)
{
    return doc.Descendants("Number")
              .Any(element => element.Value == number);
}

(One point to note - it looks a bit odd that you've got quotes round the numbers in the XML file. Do you have to have them?)

answered Jun 29, 2009 at 16:32

Jon Skeet

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2 Comments

CoderDennis Over a year ago

Even odder that the date has an opening quote and the time has a closing quote.

Jon Skeet Over a year ago

True - I didn't look beyond the Number element :)

Talljoe · Accepted Answer · 2009-06-29 16:33:23Z

2

I think this should do it.

var exists = xml.Descendants("Number")
                .Any(e => String.Equals(
                   (string)e, 
                   number, 
                   StringComparison.OrdinalIgnoreCase))

answered Jun 29, 2009 at 16:33

Talljoe

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