Need help with Inserting data into a SQL db

DataAdapter.Update method works primarily off of DataTable, trying to write rows back to the database table from the in - memory DataTable. If that is all you want to do then you in fact add rows to the DataTable, then those rows will be marked with a RowState of added, then you call the Datatable Update method either on the whole set of DataRows or on a selection of datarows based on RowState. Look it up in Visual Studio Help, by searching on these terms, and also searching on DataSet. Parameters have their place but I don't think that is the bread and butter way to update your tables on a row by row insert basis. I think that is for queries that update sets of rows that already exist in te database, and then you probably need a DataAdapter object, a Command object on top of a Connection object with a query string and placeholders therein for parameters and a Parameters object to supply values woul dprobably be enough.

oleDbDataAdapter1.SelectCommand.Parameters["simi"] The above is something u use with stored procedures in the database, since ur new to all of this, i don't think you are using any... Just look it up in google, coz this is basic stuff, should be easy to find.