XPathExpression::Compile Method (String^, IXmlNamespaceResolver^)
Compiles the specified XPath expression, with the IXmlNamespaceResolver object specified for namespace resolution, and returns an XPathExpression object that represents the XPath expression.
Assembly: System.Xml (in System.Xml.dll)
public: static XPathExpression^ Compile( String^ xpath, IXmlNamespaceResolver^ nsResolver )
Parameters
- xpath
-
Type:
System::String^
An XPath expression.
- nsResolver
-
Type:
System.Xml::IXmlNamespaceResolver^
An object that implements the IXmlNamespaceResolver interface for namespace resolution.
| Exception | Condition |
|---|---|
| ArgumentException | The XPath expression parameter is not a valid XPath expression. |
| XPathException | The XPath expression is not valid. |
An XPath expression is evaluated to yield one of the following result types.
Note |
|---|
If a user-defined function with an invalid number of arguments (or an unimplemented user-defined function) is specified in the XPath expression, an exception occurs only at run-time. User-defined functions are not checked at compile time and exceptions resulting from user-defined functions occur only if execution evaluates the expression. |
Note |
|---|
It is not possible to compile a XPathExpression with a custom context in one step by passing an XsltContext, which implements IXmlNamespaceResolver, as an argument to this method. To use a XPathExpression with a custom context, you must call the SetContext method after compiling the expression. |
Available since 2.0
Silverlight
Available since 4.0
