TemplateControl.Eval Method (String, String)
Evaluates a data-binding expression using the specified format string to display the result.
Assembly: System.Web (in System.Web.dll)
Parameters
- expression
- Type: System.String
The navigation path from the container to the public property value to place in the bound control property.
- format
- Type: System.String
A .NET Framework format string to apply to the result.
Return Value
Type: System.StringA string that results from the evaluation of the data-binding expression and conversion to a string type.
| Exception | Condition |
|---|---|
| InvalidOperationException | The data-binding method can only be used for controls contained on a Page. |
| ArgumentNullException | expression is a 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 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.