RouteValueExpressionBuilder::EvaluateExpression Method (Object^, BoundPropertyEntry^, Object^, ExpressionBuilderContext^)
Retrieves the value that corresponds to a specified route key.
Assembly: System.Web (in System.Web.dll)
public: virtual Object^ EvaluateExpression( Object^ target, BoundPropertyEntry^ entry, Object^ parsedData, ExpressionBuilderContext^ context ) override
Parameters
- target
-
Type:
System::Object^
The control that the expression is bound to.
- entry
-
Type:
System.Web.UI::BoundPropertyEntry^
The property that the expression is bound to.
- parsedData
-
Type:
System::Object^
(This parameter is not used in this implementation.)
- context
-
Type:
System.Web.Compilation::ExpressionBuilderContext^
Properties for the control or page.
Return Value
Type: System::Object^The value that corresponds to the URL parameter that is specified for the current page. The method returns null if target is null or if it does not derive from Control.
ASP.NET calls this method when an expression of the form <%$ RouteValue:urlparameter %> is encountered in a no-compile page. This method overrides the EvaluateExpression method by calling the GetRouteValue method. It gets the Page object from the context parameter, and it gets the expression, the control type, and the property name from the entry parameter.
Available since 4.0