I want to use XSLT to format xml, next is my xml file and xsl file

XML
...
<root>
  <user>
  <user_id>27</user_id>
  <name>John</name>
  </user>
......
</root>

XSL file

<xsl:template match="/">
  <xsl:for-each select="root/user">
  <tr>
    <td>& href="#">Link &</td>
    <td><xsl:value-of select="name"/></td>
  </tr>
  </xsl:for-each>
</xsl:template>

In line 4 of xsl file , I want to put value from <xsl:value-of select="user_id"/> into html link. just href="<xsl:value-of select="user_id"/>"
I tried several methods to do it, anyone didn't work successfully.

Please help ....

Try xsl:attribute

<a>
   <xsl:attribute name="href"><xsl:value-of select="user_id"/></xsl:attribute>
</a>

David

Another mechanism: use an attribute value template: {user_id}

<xsl:template match="/">
  <xsl:for-each select="root/user">
  <tr>
    <td><a href="{user_id}">Link</a></td>
    <td><xsl:value-of select="name"/></td>
  </tr>
  </xsl:for-each>
</xsl:template>