how to extract only xml from the string ?

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<processresponse xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><extensiondata /><errorcode>0</errorcode><errormessage /><message>successful.</message></processresponse>

i have to extract only..

HTML

<errorcode>0</errorcode><errormessage /><message>successful.</message>

Posted 10-Sep-14 19:53pm

Naveen Singh

Updated 10-Sep-14 19:54pm

v2

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-09-10T20:10:00

The whole string is also XML. So, better parse the whole thing and then use the data from the element you are interested in. .NET offers different ways of parsing XML; below is my short overview of them:

Use System.Xml.XmlDocument class. It implements DOM interface; this way is the easiest and good enough if the size if the document is not too big.
See http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx[^].
Use the class System.Xml.XmlTextReader; this is the fastest way of reading, especially is you need to skip some data.
See http://msdn.microsoft.com/en-us/library/system.xml.xmlreader.aspx[^].
Use the class System.Xml.Linq.XDocument; this is the most adequate way similar to that of XmlDocument, supporting LINQ to XML Programming.
See http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx[^], http://msdn.microsoft.com/en-us/library/bb387063.aspx[^].

—SA

_Asif_ · Answer 2 · 2014-09-10T20:02:00

Solution 1

You can use below regular expression to extract desired string.

<errorcode>.*<\/message>

C#

string str = @"<processresponse xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema'><extensiondata /><errorcode>0</errorcode><errormessage /><message>successful.</message></processresponse>";
Regex reg = new Regex(@"<errorcode>.*<\/message>");
Match tmp = reg.Match(str);
Console.WriteLine(tmp.Value);

Posted 10-Sep-14 20:02pm

_Asif_

Updated 10-Sep-14 20:07pm

v2

Comments

Naveen Singh 11-Sep-14 2:04am

i am fetching this string from sql database...then how can i use this expression.Thanks Syed Asif

Naveen Singh 12-Sep-14 2:42am

@Syed Asif tmp.vale returns null ....!

_Asif_ 12-Sep-14 2:52am

static void Main(string[] args)
{
string str = @"<processresponse xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema'><extensiondata><errorcode>0<errormessage><message>successful.</processresponse>";
Regex reg = new Regex(@"<errorcode>.*<\/message>");
Match tmp = reg.Match(str);
Console.WriteLine(tmp.Value);
}

tmp.Value =
"<errorcode>0</errorcode><errormessage></errormessage><message>successful.</message>"</errorcode>