Evaluates a data-binding expression.
(in System.Web.dll)
Visual Basic (Declaration)
Protected Friend Function Eval ( _
expression As String _
) As Object
Dim expression As String
Dim returnValue As Object
returnValue = Me.Eval(expression)
protected internal Object Eval(
string expression
)
protected public:
Object^ Eval(
String^ expression
)
protected internal function Eval(
expression : String
) : 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..::.ObjectAn object that results from the evaluation of the data-binding expression.
| Exception | Condition |
|---|
| InvalidOperationException | The data-binding method can be used only for controls contained on a Page. |
| ArgumentNullException |
expression is nullNothingnullptra null reference (Nothing in Visual Basic). - or -
expression is an empty string (""). |
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.
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
Reference
Other Resources