ExpressionBuilder::EvaluateExpression Method (Object^, BoundPropertyEntry^, Object^, ExpressionBuilderContext^)

 

When overridden in a derived class, returns an object that represents an evaluated expression.

Namespace:   System.Web.Compilation
Assembly:  System.Web (in System.Web.dll)

public:
virtual Object^ EvaluateExpression(
	Object^ target,
	BoundPropertyEntry^ entry,
	Object^ parsedData,
	ExpressionBuilderContext^ context
)

Parameters

target
Type: System::Object^

The object containing the expression.

entry
Type: System.Web.UI::BoundPropertyEntry^

The object that represents information about the property bound to by the expression.

parsedData
Type: System::Object^

The object containing parsed data as returned by ParseExpression.

context
Type: System.Web.Compilation::ExpressionBuilderContext^

Contextual information for the evaluation of the expression.

Return Value

Type: System::Object^

An object that represents the evaluated expression; otherwise, null if the inheritor does not implement EvaluateExpression.

If you want your ExpressionBuilder object to be active on a page that supports the no-compile feature, you can override the EvaluateExpression method and the SupportsEvaluate property. The EvaluateExpression method should return the evaluation of the current expression.

Notes to Inheritors:

If you override the EvaluateExpression method, you must also override the SupportsEvaluate property.

The following code example demonstrates how to use the overridden EvaluateExpression method to return an evaluated expression.

.NET Framework
Available since 2.0
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