----------------------------------------------------------- New Message on MumbaiUserGroup
----------------------------------------------------------- From: Swapnil_B1 Message 1 in Discussion The ASP.NET 1.x DataGrid control requires you to write a lot of custom code to handle common operations such as paging, sorting, editing and deleting data. For example, while the DataGrid control can raise events when the user clicks to save or cancel changes, it doesn't offer much more than that. If you want to store changes to a persistent medium, such as a database, you have to handle the UpdateCommand event yourself, retrieve changed values, prepare a SQL command, and then proceed from there to commit the update. The reason the DataGrid control limits the raising of events for common data operations is that it's a data source-agnostic control that can be bound to any data object that is enumerable. Implementing data operations such as update or delete would require a direct link with one particular data source. In ASP.NET 1.x, you work around this limitation by writing ADO.NET code that is specific to your application. ASP.NET 2.0 enhances the data-binding architecture, introducing a new family of componentsthe data source objectswhich act as a bridge between data-bound controls and ADO.NET objects. These source objects promote a slightly different programming model and provide for new features and members. For data reporting purposes, your ASP.NET 2.0 applications should use the newest grid controlthe GridView. The familiar DataGrid control is still supported, but it doesn't take full advantage of the specific capabilities of data source components. The GridView control is the successor to the DataGrid and extends it in a number of ways. First, it fully supports data source components and can automatically handle data operations, such as paging, sorting, and editing, provided its bound data source object supports these capabilities. In addition, the GridView control offers some functional improvements over the DataGrid. In particular, it supports multiple primary key fields and exposes some user interface enhancements and a new model for handling and canceling events. The GridView comes with a pair of complementary view controls: DetailsView and FormView. By combining these controls, you can easily set up master/detail views using very little code and sometimes no code at all. Difference in Datagrid and Gridview Although similar in their high-level functionality, the GridView and the DataGrid controls have a different foundation. To enable easy migration from existing pages, the GridView preserves the DataGrid object model as much as possible. However, you shouldn't expect 100 percent compatibility between DataGrid-based code and new GridView-based code. Another key difference between the DataGrid and GridView controls lies in the adaptive user interface. Unlike the version 1.x DataGrid, the GridView can render on mobile devices, too. In other words, to build reports on mobile devices, you can use the same grid control you would use for desktop pages. The DataGrid in version 2.0 can also render adaptively, but its UI capabilities are not quite as rich as those of the GridView. In ASP.NET 2.0, the DataGrid control has been enhanced to support common control features such as themes and personalization. In addition, the new DataGrid control can be populated by a data source control. Remember, though, that a DataGrid can only bind to a data source object for the purpose of reading data. To actually modify the underlying data source, some user-defined code is still required. In contrast, the GridView control takes advantage of the capabilities of the underlying data source and automatically deletes or updates records. Note that the GridView control also supports the classic binding mechanism based on the DataSource property and the DataBind method. Although fully supported, this programming practice is discouraged. Swapnil (Swaps) http://swapsnet.spaces.live.com/ ----------------------------------------------------------- To stop getting this e-mail, or change how often it arrives, go to your E-mail Settings. http://groups.msn.com/MumbaiUserGroup/_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]
