The DataBinder Control is a databinding extender that provides Simple Control DataBinding to any ASP.NET Web Forms control. The DataBinder provides deterministic two-way databinding and can consolidate databinding, unbinding, error trapping and error display.

The control provides the following features:

• Allows deterministic two-way data binding
  
• Binds single object or data values to a single control property (any object value to any control property)
  
• Unbinds single control values back into object or data values
  
• Handles data conversion from text to typed data
  
• Manages any binding errors in a BindingErrors collection
  
• Allows for custom validation events
  
• Can check for required values in input
  
• Provides for displaying error icons next to controls
  
• Shows message summary with links to controls
  
• Can generate interactive Error display that highlights error controls
  
• Allows for adding binding errors programmatically
  
• Can work with existing ASP.NET Validator controls
  

The DataBinder works in the ASP.NET Designer as an extender control that extends any controls with DataBinding properties:

At runtime the DataBinder takes over binding and unbinding of properties as well as error trapping and display - here in combination with the ErrorDisplay control:

For more information on how this works see the How DataBinder works topic.