ConnectionStringsExpressionBuilder.EvaluateExpression Method

Returns a value from the <connectionStrings> 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
public Object EvaluateExpression (
	Object target, 
	BoundPropertyEntry entry, 
	Object parsedData, 
	ExpressionBuilderContext context
)
public override function EvaluateExpression (
	target : Object, 
	entry : BoundPropertyEntry, 
	parsedData : Object, 
	context : ExpressionBuilderContext
) : Object
Not applicable.

Parameters

target

The object that contains the expression.

entry

The property to which the expression is bound.

parsedData

The object that represents parsed data as returned by ParseExpression.

context

Properties for the control or page.

Return Value

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

Exception typeCondition

InvalidOperationException

The connection string name could not be found in the Web.config file.

This method is called when an expression of the form <%$ ConnectionStrings: secureConnectionString %> is encountered in a page that is not compiled. It retrieves the appropriate value from the <connectionStrings> section of the Web.config file. This method overrides the EvaluateExpression method by calling the GetConnectionString method if a connection string is included in the parsedData parameter, or by calling the GetConnectionStringProviderName method if a connection string is not included in the parsedData parameter.

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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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