DataBinder.Eval Method (Object, String)
Assembly: System.Web (in system.web.dll)
The object reference against which the expression is evaluated. This must be a valid object identifier in the page's specified language.
The navigation path from the container object to the public property value to be placed in the bound control property. This must be a string of property or field names separated by periods, such as
Tables.DefaultView..Pricein C# or
Tables(0).DefaultView.(0).Pricein Visual Basic.
Return ValueAn Object instance that results from the evaluation of the data-binding expression.
expression is a null reference (Nothing in Visual Basic) or is an empty string after trimming.
The value of the expression parameter must evaluate to a public property.
This method is automatically called when you create data bindings in a rapid application development (RAD) designer such as Visual Studio. You can also use it declaratively to simplify casting to a text string. To do so, you use the <%# %> expression syntax, as used in standard ASP.NET data binding.
This method is particularly useful when binding data to controls that are in a templated list.
Because this method performs late-bound evaluation, using reflection at run time, it can cause performance to noticeably slow compared to standard ASP.NET data-binding syntax.