Get data from Table using dataTable using c#.net
static public DataTable getData(string selectstr)
{
string connectionString = "";
OleDbConnection connection = null;
OleDbDataAdapter adp = null;
OleDbCommandBuilder oleDbCommandBuilder = null;
DataTable dataTable = null;
connectionString = ConfigurationSettings.AppSettings["ConnectionString"];
connection = new OleDbConnection(connectionString);
connection.Open();
adp = new OleDbDataAdapter(selectstr, connection);
oleDbCommandBuilder = new OleDbCommandBuilder(adp);
dataTable = new DataTable();
adp.Fill(dataTable);
connection.Close();
return dataTable;
}