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AppSettingsExpressionBuilder::EvaluateExpression Method

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

Namespace:  System.Web.Compilation
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 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.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
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