AppSettingsExpressionBuilder.EvaluateExpression Method (Object, BoundPropertyEntry, Object, ExpressionBuilderContext)

 

Returns a value from the <appSettings> section of the Web.config file.

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

Public Overrides Function EvaluateExpression (
	target As Object,
	entry As BoundPropertyEntry,
	parsedData As Object,
	context As ExpressionBuilderContext
) As Object

Parameters

target
Type: System.Object

The object that contains the property entry.

entry
Type: System.Web.UI.BoundPropertyEntry

The property to which the expression is bound..

parsedData
Type: System.Object

The object that represents parsed data as returned by ParseExpression.

context
Type: System.Web.Compilation.ExpressionBuilderContext

Properties for the control or page.

Return Value

Type: System.Object

The Object associated with a key in the <appSettings> section of the Web.config file.

This method is called when an expression of the form <%$ AppSettings: someApplicationSetting %> is encountered in a no-compile page. It retrieves the appropriate value from the key/value pairs in the <appSettings> section of the Web.config file. This method overrides EvaluateExpression by calling the GetAppSetting method with the Expression property as the key parameter, the Name property on the PropertyEntry.PropertyInfo property as the propertyName parameter, and the Type of the target parameter as the targetType parameter.

.NET Framework
Available since 2.0
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