c# - Why can I not find the XElements in my XML document? -

-

i know repeated question on so, answers haven't helped out. trying details of book using classify api c#. gives xml output like:

<classify xmlns="http://classify.oclc.org">     <response code="2"/>     <!--         classify product of oclc online computer library center: http://classify.oclc.org     -->     <work author="coelho, paulo | clarke, alan [author; translator] | sampere, daniel, 1985- [illustrator; draftsman] | lemmens, harrie, 1953- [translator] | smith, james noel | ruiz, derek, 1980- [adapter]" editions="176" format="book" holdings="7530" itemtype="itemtype-book" pswid="1151562357" title="the alchemist">123115868</work>     <authors>         <author lc="n94113544" viaf="65709090">clarke, alan [author; translator]</author>         <author lc="no2005013941" viaf="12032914">lemmens, harrie, 1953- [translator]</author>         <author lc="no2010190009" viaf="160023476">sampere, daniel, 1985- [illustrator; draftsman]</author>         <author lc="n86099875" viaf="52700">coelho, paulo</author>     </authors>     <orderby>hold desc</orderby>     <input type="stdnbr">9780754073963</input>     <!-- snip --> </classify>

i have worked xml in php, not c# new , tutorials regarding everywhere tell different things making me confused , how it. want these things xml:

  • title of book ( in work element )
  • authors of book ( in work element )
  • isbn of book ( in input element - type stdnbr )
  • most popular ddc ( in recommendations > ddc > mostpopular - attribute [nsfa] )

but examples have seen on here , on other forums nullreferenceexception.

code:

ps: it's not homework.

public frmadditem(string xml) {     initializecomponent();     string itemname = null, itemauth = null, itemisbn = null;     xdocument xdoc = new xdocument();     xdoc = xdocument.parse(xml);         string itemname = xdoc.element("classify").descendants("work").where(s => s.attributes() == "title");     string itemauth = xdoc.element("classify").descendants("work").attributes("author").tostring();     string itemisbn = xdoc.element("classify").descendants("input").tostring();     txttitle.text = itemname;     txtauth.text = itemauth;     txtisbn.text = itemisbn;     string itemddc = xdoc.element("ddc").descendants("latestedition").attributes("sfa"); }

edit duplicate: link mentioned duplicate not same/similar xml string. uses different approach didn't work mentioned in start of question.

since xml document has namespace defined, apis require qualify element names namespaces. code using "local" names. there couple ways qualify them. example below gets 'title' attribute. simple expand on whatever other content/attributes want.

using system.xml; using system.xml.linq; using system.xml.xpath;  public class program {     public static void main(string[] args)     {         var doc = xdocument.load("http://classify.oclc.org/classify2/classify?stdnbr=9780754073963");         var nsmanager = new xmlnamespacemanager(new nametable());         nsmanager.addnamespace("c", "http://classify.oclc.org");          var work = doc.xpathselectelement("//c:work", nsmanager);         console.writeline(work.attribute("title").value);          var mostpopular = doc.xpathselectelement("//c:ddc/c:mostpopular", nsmanager);         console.writeline(mostpopular.attribute("nsfa").value);                 } }

Comments

Post a Comment

Popular posts from this blog

database - VFP Grid + SQL server 2008 - grid not showing correctly -

-
i having problem, have grid called "gridbasica" , this: thisform.gridbase.recordsource = "sgviemp" sgviemp cursor made executing select sqlserver command sqlexec. when want modify registry, go form , the update there. so, when come form grid, grid isnt grid anymore, big white rectangle. reading around said: delete recordsource , asingt again. thisform.gridbase.recordsource = "" *--i sqlexe here thisform.gridbase.recordsource = "sgviemp" i , works, but, when click button modify again cursos updated modify form doesnt load fields did first time. could me out that? thanks in advance. --------------- edit ------------------ i have been doing recommended: lnselect = select(0) n = sqlexec(thisform.conexion,"select emp_ccodigo codigo, emp_cnombre 'nombre o razon social', emp_cnumrif 'r.i.f' sgviempr","sgviemp1") set echo on suspend select sgviemp zap in sgviemp *-- browse *--zaps correct
Read more

jquery - Set jPicker field to empty value -

-
im using jpicker color selector in form. have clear value set window/icon 'no color selected' state. i've tried following: $(':input[name="color"]').val(''); //access value directly. (does not affect jpicker) 2: $.jpicker.list[0].color.active.val('hex', '', this); //set color black , input value 000000, instead of empty string 3: $.jpicker.list[0].color.active.val(null, '', this); //does nothing none of 3 methods seems behave properly. in advance. this works me :) $.jpicker.list[0].color.active.val('v', null); here example: http://jsfiddle.net/3up7n/
Read more

.htaccess - htaccess convert request to clean url and add slash at the end of the url -

-
ok , searched more 4 days , more 20 posts here in stach or in websites without kind of success first here htaccess file rewriteengine on rewriterule ^([a-za-z0-9_]+)/?$ index.php?page=$1 [nc] rewriterule ^([a-za-z0-9_]+)\/([a-za-z0-9_]+)\/?$ index.php?page=$1&action=$2 [nc] i tried many codes 1 worked me can call request , works me www.example.com/pagename => www.example.com/index.php?page=pagename here questions , please provide me information "in detail" understand code well 1- how convert request automatically www.example.com/index.php?page=pagename www.example.com/pagename 2- if tried add slash @ end shows me page without images or styling mean www.example.com/pagename => works www.example.com/pagename/ => doesn't work that's :) for first part need 301 rule this: rewritecond %{the_request} /index\.php\?page=([^\s&]+) [nc] rewriterule ^ /%1? [r=301,l] for second part use absolute path in css, js, images files r
Read more