----------------------------------------------------------- New Message on BDOTNET
----------------------------------------------------------- From: RedSunBeer Message 2 in Discussion A facade is a class that provides a means for a 'client' to access a set of business operations. We normally maintain a set of related buisness objects in an assembly or dll. To access these objects a facade a used. The facade exposes its methods and properties a client. It then has the intelligence built inside it to call the required business objects to carry out a set of specific tasks. The relationship is similar to a interface and a class where the interface exposes only those properties and methods that a client would require from the class. The client is unaware of other methods in the class if they access it via the interface. The class methods may communicate with each other to execute a clients request without the client being aware of this fact. For example the client would simply call a method to insert data into a db and pass the values to the facade. Inside the facade the values are sent to different business objects which insert the values to the repective database tables. So the client is unaware of which business objects are being used only the facade knows this. This means we can design our client applications to simply send data to the facade. So any changes to the business classes would mean changes to the facade only and not the client. ie the facade would need to be altered if a new business class is added without the client being affected. ----------------------------------------------------------- To stop getting this e-mail, or change how often it arrives, go to your E-mail Settings. http://groups.msn.com/BDotNet/_emailsettings.msnw Need help? If you've forgotten your password, please go to Passport Member Services. http://groups.msn.com/_passportredir.msnw?ppmprop=help For other questions or feedback, go to our Contact Us page. http://groups.msn.com/contact If you do not want to receive future e-mail from this MSN group, or if you received this message by mistake, please click the "Remove" link below. On the pre-addressed e-mail message that opens, simply click "Send". Your e-mail address will be deleted from this group's mailing list. mailto:[EMAIL PROTECTED]
