TemplateControl.Eval Method (String, String)

Evaluates a data-binding expression using the specified format string to display the result.

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

protected internal string Eval(
	string expression,
	string format
)

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.String
A string that results from the evaluation of the data-binding expression and conversion to a string type.

ExceptionCondition
InvalidOperationException

The data-binding method can only be used for controls contained on a Page.

ArgumentNullException

expression is null.

- 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.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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