This method extracts a subset from the XML data represented by the OracleXmlType object using the given XPath expression and a string parameter for namespace resolution.

Declaration

// C#
public OracleXmlType Extract(string xpathExpr, string nsMap);

Parameters

• xpathExpr

  The XPath expression.

• nsMap

  The string parameter used for namespace resolution of the XPath expression. nsMap has zero or more namespaces separated by spaces. nsMap can be null. For example:

   xmlns:nsi"=http://www.company1.com" xmlns:nsz="http://www.company2.com"
  

Return Value

An OracleXmlType object.

Exceptions

ObjectDisposedException - The object is already disposed.

ArgumentNullException - The xpathExpr is null or zero-length.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.