[Solved] ASP.Net LoadXml Error: g is an undeclared prefix

Hi counterkin,

Please refer updated code.

If you are using g then, the Namespace prefixes must be declared. You have to add on or above the element that uses the namespace prefix.

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    string xmlDoc = "<?xml version='1.0' encoding='utf-8'?>";
    xmlDoc += "<channel>";
    xmlDoc += "<title>Super X Job Site</title>";
    xmlDoc += "<link>http://www.superxjobsite.com</link>";
    xmlDoc += "<description>http://www.superxjobsite.com</description>";
    xmlDoc += "<item>";
    xmlDoc += "<g:id xmlns:g='http://www.w3.org/2001/XInclude'>ABCDE</g:id>";
    xmlDoc += "</item>";
    xmlDoc += "</channel>";
    System.Xml.XmlDocument xdoc = new System.Xml.XmlDocument();
    xdoc.LoadXml(xmlDoc);
    xdoc.Save(Server.MapPath("~/feed.xml"));
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
    Dim xmlDoc As String = "<?xml version='1.0' encoding='utf-8'?>"
    xmlDoc += "<channel>"
    xmlDoc += "<title>Super X Job Site</title>"
    xmlDoc += "<link>http://www.superxjobsite.com</link>"
    xmlDoc += "<description>http://www.superxjobsite.com</description>"
    xmlDoc += "<item>"
    xmlDoc += "<g:id xmlns:g='http://www.w3.org/2001/XInclude'>ABCDE</g:id>"
    xmlDoc += "</item>"
    xmlDoc += "</channel>"
    Dim xdoc As System.Xml.XmlDocument = New System.Xml.XmlDocument()
    xdoc.LoadXml(xmlDoc)
    xdoc.Save(Server.MapPath("~/feed.xml"))
End Sub

Generated XML

<?xml version="1.0" encoding="utf-8"?>
<channel>
  <title>Super X Job Site</title>
  <link>http://www.superxjobsite.com</link>
  <description>http://www.superxjobsite.com</description>
  <item>
    <g:id xmlns:g="http://www.w3.org/2001/XInclude">ABCDE</g:id>
  </item>
</channel>