I search the stackoverflow.com for my issue,and i found this answer related to mine.the problem is i dont know how to apply this code to my asp.net mvc web site
<?php
$string = file_get_contents('http://steamcommunity.com/market/listings/730/AK-47%20|%20Vulcan%20%28Battle-Scarred%29');
$attrList = explode('<span class="market_listing_price market_listing_price_with_fee">',$string);
$N=count($attrList);
for ($i=1;$i<$N;$i++){
$prices[$i-1] = explode('</span>',$attrList[$i])[0];
}
print_r($prices);
?>