xml - Can't get XSL to Display Correctly with XSL Variables and XPATH -


i'm making basic contact list web app 3 pages - contact list page displays contacts in db (stored in xml file), contact view page (that read-only page displays contact information), , new contact page (that allows make new contact or edit information of existing contact).

my issue contact view page. each contact has id, , id passed through url (i.e. contactviewer?id=mk). using id, hoping using simple xsl for-each checks url request (saved in xsl variable) pick contact db display work. unfortunately, after adding "for-each" nothing displays on page , can't figure out it's going wrong.

this xsl page contactview.

<?xml version="1.0" encoding="iso-8859-1"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">     <xsl:param name="url"/>     <xsl:variable name="currentid" select="substring-after($url, 'id=')"/>     <xsl:template match="/">         <html>             <head>                 <title>contact database - contact viewer</title>                 <style>                     h1 {color:white; background-color:black; border-style:solid;                     border-color: #981b1e; padding-left:10px; font-weight:bold;}                 </style>             </head>             <body>                 <h1>contact viewer</h1>                 <xsl:value-of select="$currentid"/>                 <xsl:for-each select="contactdatabase/contact/id[$currentid]">                     <table cellspacing="5" border="3">                         <tr  height="60">                             <td width="70px">                                 <xsl:value-of select="contactdatabase/contact/firstname"/>                             </td>                             <td width="100px">                                 <xsl:value-of select= "contactdatabase/contact/lastname"/>                             </td>                             <td width="120px">                                 <xsl:value-of select="contactdatabase/contact/firstname"/>                             </td>                             <td width="90px">                                 <xsl:value-of select="contactdatabase/contact/firstname"/>                             </td>                             <td width="35px">                                 <xsl:value-of select="contactdatabase/contact/state"/>                             </td>                             <td width="44px">                                 <xsl:value-of select="contactdatabase/contact/zipcode"/>                             </td>                             <td width="60px">                                 <xsl:value-of select="contactdatabase/contact/country"/>                             </td>                             <td width="80">                                 <xsl:value-of select="contactdatabase/contact/email"/> <br></br>                                 <xsl:value-of select="contactdatabase/contact/home"/> <br></br>                                 <xsl:value-of select="contactdatabase/contact/mail"/>                             </td>                             <td width="80">                                 <xsl:value-of select="contactdatabase/contact/phonenum"/>                             </td>                             <td width="180">                                 <xsl:value-of select="contactdatabase/contact/emailaddress"/>                             </td>                             <td width="120px">                                 <a href="contactviewer?contactid={id}">view</a> / edit / delete                             </td>                         </tr>                     </table>                 </xsl:for-each>                 <a href="contactlist">contact list</a>             </body>         </html>     </xsl:template> </xsl:stylesheet>

the xml database set as

<contactdatabase>     <contact>         <firstname />         <lastname />         <address />         <city />         <state />         <zipcode />         <country />         <email />         <phone />         <mail />         <phonenum />         <emailaddress />         <comment />         <id />     </contact> </contactdatabase>

the correct xpath expression select required contact element contactdatabase/contact[id = $currentid].

rather for-each use apply-templates format contact element given id, , write separate template match contact elements. this.

<?xml version="1.0" encoding="iso-8859-1"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">    <xsl:param name="url"/>   <xsl:variable name="currentid" select="substring-after($url, 'id=')"/>    <xsl:template match="/">     <html>       <head>         <title>contact database - contact viewer</title>         <style>           h1 {             color:white;             background-color:black;             border-style:solid;             border-color:#981b1e;             padding-left:10px;             font-weight:bold;           }         </style>       </head>       <body>         <h1>contact viewer</h1>         <xsl:value-of select="$currentid"/>         <xsl:apply-templates select="contactdatabase/contact[id = $currentid]"/>         <a href="contactlist">contact list</a>       </body>     </html>   </xsl:template>    <xsl:template match="contact">        <table cellspacing="5" border="3">         <tr height="60">           <td width="70px">             <xsl:value-of select="firstname"/>           </td>           <td width="100px">             <xsl:value-of select= "lastname"/>           </td>           <td width="120px">             <xsl:value-of select="firstname"/>           </td>           <td width="90px">             <xsl:value-of select="firstname"/>           </td>           <td width="35px">             <xsl:value-of select="state"/>           </td>           <td width="44px">             <xsl:value-of select="zipcode"/>           </td>           <td width="60px">             <xsl:value-of select="country"/>           </td>           <td width="80">             <xsl:value-of select="email"/> <br></br>             <xsl:value-of select="home"/> <br></br>             <xsl:value-of select="mail"/>           </td>           <td width="80">             <xsl:value-of select="phonenum"/>           </td>           <td width="180">             <xsl:value-of select="emailaddress"/>           </td>           <td width="120px">             <a href="contactviewer?contactid={id}">view</a> / edit / delete           </td>         </tr>       </table>    </xsl:template>  </xsl:stylesheet>

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