修改了数据,你只是修改了datagirdview控件里面的数据,并没有修改数据库的``你必需通过adapter控件的update方法来修改``例如:
Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Application.StartupPath & "\Library.mdb")
Dim st As String = "select * from BookCode"
Dim da As New OleDbDataAdapter(st, conn)
Dim ds As New DataSet()
Dim bt As New OleDbCommandBuilder(da)
da.Update(ds.Tables(0))
ds.AcceptChanges()