This method checks the existence of a particular set of nodes identified by the XPath expression in the XML document represented by the current OracleXmlType instance using a .NET XmlNameSpaceManager object for namespace resolution.
Declaration
// C# public bool IsExists(string xpathExpr, XmlNameSpaceManager nsMgr);
Parameters
xpathExpr
The XPath expression.
nsMgr
The .NET XmlNameSpaceManager object used for namespace resolution of the XPath expression. nsMgr can be null.
Return Value
Returns true if the required set of nodes exists; otherwise, returns false.
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.
Remarks
The default namespace is ignored if its value is an empty string.