c# - Get value from node -

i have question) how can value specific node(info/weather/day/day_part type="День" /tempreture )

<?xml version="1.0" encoding="utf-8"?> <info lang="ru" xmlns:x="http://www.yandex.ru/xscript">   +<region id="213" lon="37.617671" lat="55.755768" zoom="10"/>   <traffic lon="37.617671" lat="55.755768" zoom="10" region="213"></traffic>   <weather region="213" climate="1">     <source xmlns:xi="http://www.w3.org/2001/xinclude">mb3d</source>     <day xmlns:xi="http://www.w3.org/2001/xinclude">       <title>Москва</title>       <country>Россия</country>       <time_zone>europe/moscow</time_zone>       <summer-time>0</summer-time>       <sun_rise>06:51</sun_rise>       <sunset>20:14</sunset>       <daytime>d</daytime>+<date date="2013-04-05t00:00:00z"/>       <day_part type="день" typeid="2">         <weather_type>облачно</weather_type>         <weather_code>overcast</weather_code>         <image>http://weather.yandex.ru/i/5.png</image>         <image-v2 size="22x22">http://yandex.st/weather/v-1/i/icons/22x22/ovc_+6.png</image-v2>         <image-v3 size="48x48">http://yandex.st/weather/v-1/i/icons/48x48/ovc.png</image-v3>         <image_number>5</image_number>         <wind_speed>5.0</wind_speed>         <wind_direction id="se">юв</wind_direction>         <dampness>70</dampness>         <pressure>743</pressure>         <temperature color="f2f0e6" class_name="t6">+5</temperature>         <time_zone>europe/moscow</time_zone>         <observation_time>17:30</observation_time>         <observation>2013-04-05t17:30:00</observation>       </day_part>       <day_part type="вечер" typeid="3"></day_part>       <day_part type="ночь" typeid="4"></day_part>       <day_part type="утро" typeid="1"></day_part>       <day_part type="день" typeid="2"></day_part>       <night_short></night_short>       <tomorrow></tomorrow>     </day>     <url xmlns:xi="http://www.w3.org/2001/xinclude">http://pogoda.yandex.ru/moscow/</url>   </weather> </info> 

i have code, how can specify need node type="День"

xelement elem = xdocument.element("info");      if (elem != null)         foreach (var el in elem.elements("weather").elements("day").elements("day_part"))            {              var level = el.element("temperature").value;              listbox1.items.add(level);            }; 

this block of code returns 2 values(+5, +6) need one(+5) , throw exception.

first of - input xml not valid , can't loaded xdocument. fixed be:

<?xml version="1.0" encoding="utf-8"?> <info lang="ru" xmlns:x="http://www.yandex.ru/xscript">+<region id="213" lon="37.617671" lat="55.755768" zoom="10" /> <traffic lon="37.617671" lat="55.755768" zoom="10" region="213"></traffic>  <weather region="213" climate="1">  <source xmlns:xi="http://www.w3.org/2001/xinclude">mb3d</source>  <day xmlns:xi="http://www.w3.org/2001/xinclude">   <title>Москва</title>   <country>Россия</country>    <time_zone>europe/moscow</time_zone>    <summer-time>0</summer-time>     <sun_rise>06:51</sun_rise>   <sunset>20:14</sunset>   <daytime>d</daytime>   <date date="2013-04-05t00:00:00z"></date>   <day_part type="день" typeid="2">           <weather_type>облачно</weather_type>           <weather_code>overcast</weather_code>           <image>http://weather.yandex.ru/i/5.png</image>           <image-v2 size="22x22">http://yandex.st/weather/v-1/i/icons/22x22/ovc_+6.png</image-v2>           <image-v3 size="48x48">http://yandex.st/weather/v-1/i/icons/48x48/ovc.png</image-v3>           <image_number>5</image_number>           <wind_speed>5.0</wind_speed>           <wind_direction id="se">юв</wind_direction>           <dampness>70</dampness>           <pressure>743</pressure>           <temperature color="f2f0e6" class_name="t6">+5</temperature>           <time_zone>europe/moscow</time_zone>           <observation_time>17:30</observation_time>           <observation>2013-04-05t17:30:00</observation>   </day_part>   <day_part type="вечер" typeid="3"></day_part>   <day_part type="ночь" typeid="4"></day_part>   <day_part type="утро" typeid="1"></day_part>   <day_part type="день" typeid="2"></day_part>   <night_short></night_short>   <tomorrow></tomorrow> </day> <url xmlns:xi="http://www.w3.org/2001/xinclude">http://pogoda.yandex.ru/moscow/</url> </weather> </info>  

with kind of input can desired nodes values using xpathselectelements extension method:

var results = xdocument.xpathselectelements("info/weather/day/day_part[@type='день']/temperature")                        .select(e => (string)e)                        .tolist(); 

for xml document shown above results contains 1 string value: +5.

however, suggest searching day_part element using typeid attribute value instead of type:

var results = xdocument.xpathselectelements("info/weather/day/day_part[@typeid=2]/temperature")                         .select(e => (string)e)                         .tolist(); 

the same results, less chance fail because of encoding.

you can fill listbox:

foreach (var value in results)) {     listbox1.items.add(value); };