System.Web 2.0.0.0

This interface is designed to be used with Web Parts connections. In a Web Parts connection, two server controls that reside in a zone establish a connection and share data, with one control acting as the consumer and the other control acting as a provider. The mechanism for sharing data in a Web Parts connection is an interface instance, which the provider serves to the consumer by means of a callback method. To establish a connection, the consumer and provider must both work with the same interface type for sharing data. If the consumer does not recognize the interface type sent by the provider, it is still possible to connect the controls by means of a transformer (a object) that translates the interface instance sent by the provider into a type that the consumer recognizes. For details on connections, see and Web Parts Connections Overview.

The interface is a provider interface included with the Web Parts control set as a standard interface for creating connections based on a data field. You can also create custom interfaces to use with Web Parts connections, but in many data-driven Web applications, it is useful to create connections based on a common row (for details, see the interface), table (for details, see the interface), or field from the data source, using the interface. In a typical connection, a control acting as a provider would implement the interface and provide an instance of the interface to consumers in a special callback method. For example, the provider might implement an interface for a field in your user information table that contains a Web user's postal code data. Another control acting as a consumer would define a special method to receive the interface instance, and could then extract the postal code data, and look up and display weather information based on the postal code.

The interface has two exposed members. The property returns schema information about the data field encapsulated in a object. The method declares a method that an implementer (such as a provider control) uses to retrieve the interface instance's field data when the callback method is invoked.

Defines a provider interface for connecting two server controls using a single field of data.

- Method
  System.Void ``

  Use this method to retrieve the data field values passed by the interface.

  Returns the value of the field that is being used by the interface as the basis of a connection between two controls.

  A delegate that contains the address of a method that receives the data. 2.0.0.0
- Property
  System.ComponentModel.PropertyDescriptor To be added.

  This property provides property information for the data passed by the interface. Transformer and consumer controls can query this property to get information about the type, contents, and other details of the field contained in the interface instance sent by a provider.

  Gets the schema information for a data field that is used to share data between two controls.

  2.0.0.0