TemplateControl.Eval Method (String)

.NET Framework (current version)

Evaluates a data-binding expression.

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

Syntax

Protected Friend Function Eval (
	expression As String
) As Object

Parameters

expression: Type: System.String
The navigation path from the container to the public property value to place in the bound control property.

Return Value

Type: System.Object

An object that results from the evaluation of the data-binding expression.

Exceptions

Exception	Condition
InvalidOperationException	The data-binding method can be used only for controls contained on a Page.
ArgumentNullException	expression is null. - or - expression is an empty string ("").

Remarks

The value of expression must evaluate to a public property.

The Eval method calls the DataBinder.Eval method using the GetDataItem method to resolve the object reference that the expression is evaluated against.

Version Information

.NET Framework
Available since 2.0