what is the difference between datagrid and gridview

Operations like Inserting,deleting,updating,paging reqiures coding for datagrid.But for GridView coding is not reqiured for these operations.Gridview is the successor of Datagrid with more extensive features

DATAGRID
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.
GRIDVIEW
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.

DataGrid - part of Asp.Net 1.1
GridView - part of Asp.Net 2.0