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ConnectionStringsExpressionBuilder.EvaluateExpression Method

Definition

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

public:
 override System::Object ^ EvaluateExpression(System::Object ^ target, System::Web::UI::BoundPropertyEntry ^ entry, System::Object ^ parsedData, System::Web::Compilation::ExpressionBuilderContext ^ context);
public override object EvaluateExpression (object target, System.Web.UI.BoundPropertyEntry entry, object parsedData, System.Web.Compilation.ExpressionBuilderContext context);
override this.EvaluateExpression : obj * System.Web.UI.BoundPropertyEntry * obj * System.Web.Compilation.ExpressionBuilderContext -> obj
Public Overrides Function EvaluateExpression (target As Object, entry As BoundPropertyEntry, parsedData As Object, context As ExpressionBuilderContext) As Object

Parameters

target
Object

The object that contains the expression.

entry
BoundPropertyEntry

The property to which the expression is bound.

parsedData
Object

The object that represents parsed data as returned by ParseExpression(String, Type, ExpressionBuilderContext).

context
ExpressionBuilderContext

Properties for the control or page.

Returns

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

Exceptions

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

Remarks

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.

Applies to

See also