http://www.allinterview.com Top ADO.NET Interview Questions en-us http://www.allinterview.com/showanswers/16653.html No we can't, multiple datatables can be used in dataset. http://www.allinterview.com/showanswers/33026.html Data Reader is a forward only and read only data DataSet is used to maintain relationships between multiple tables. Data Reader can't persist the data Data Set can persist the data http://www.allinterview.com/showanswers/20530.html create con as connection object,cmd as command object cmd.CommandType=CommandType.Storedprocedure cmd.CommandText="storedprecedurename" cmd.ExecuteNonQuery() http://www.allinterview.com/showanswers/57078.html Execute non Query is used to execute more than one command at the time (it is used for insert ,delete ,update) http://www.allinterview.com/showanswers/4733.html Dataset consists of DataTable collection which consists of DataRows. Create Dataset object, then create DataRow object Dim objRow as New DataRow objRow(9) to objTow(19) woud give the rows between 10 and 20, as first row is stored with index http://www.allinterview.com/showanswers/33095.html The below link gives the answer for this question. ADO.NET does not default to anything. http://www.devnewsgroups.net/group/microsoft.public.dotnet.f ramework.adonet/topic43724.aspx http://www.allinterview.com/showanswers/6574.html Clone :- It only copies structure, does not copy data. Copy :- Copies both Structure and data http://www.allinterview.com/showanswers/23120.html In eidt dataset designer right click on column name which u want as primary key and set it as pk http://www.allinterview.com/showanswers/32674.html manage the data http://www.allinterview.com/showanswers/23319.html ADO.Net is the data access model for .Net ?based applications. It can be used to access relational database systems such as SQL SERVER 2000, Oracle, and many other data sources for which there is an OLD DB or ODBC provider. To a certain exte http://www.allinterview.com/showanswers/36627.html SQL NATIVE CLIENT is a Provider used to Connect with the SQL Server database. http://www.allinterview.com/showanswers/33029.html Main difference between sp and function is we cannot use store procedure in select statement where as we can use function in select statement. http://www.allinterview.com/showanswers/37134.html Try this query you can avoid InvalidCastException... string strQry = "update customer set lastname=@LastName where id=@VarId"; SqlCommand cmd=new SqlCommand(strQry,con); int varid = (int)DataGrid1.DataKeys[(int)e.Item.ItemIndex]; st http://www.allinterview.com/showanswers/35524.html It has default view like a table with columns and rows. http://www.allinterview.com/showanswers/20700.html ADO and ADO.NET are different in several ways: ? ADO works with connected data. This means that when you access data, such as viewing and updating data, it is real-time, with a connection being used all the time. This is barring, of course, yo