OleDbConnection ole_constr = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;" +
                                            "Data Source=" + txtUploadBack.Text + ";Extended Properties=dBase IV;");

            OleDbCommand ole_cmd = new OleDbCommand(); 
            cn_SQL = new SqlConnection(con_str); 
            cmd_SQL = new SqlCommand("select * from uchet_data",cn_SQL);
            cn_SQL.Open();
            ole_constr.Open();  
            sql_dr = cmd_SQL.ExecuteReader(CommandBehavior.CloseConnection);
            while (sql_dr.Read())
            {
                bu.Length =  0 ;
                bu.Append("INSERT INTO AOXXXXXX.DBF VALUES(");
                for (int i =  0 ; i < sql_dr.FieldCount; i++)
                {
                    switch (sql_dr.GetFieldType(i).ToString())
                    {
                        case "System.Int32":
                            bu.Append(sql_dr.GetInt32(i));
                            bu.Append(", "); 
                            break;
                        case "System.String":
                            bu.Append("'"); 
                            bu.Append(sql_dr.GetString(i));
                            bu.Append("'"); 
                            bu.Append(", ");
                            break;
                        case "System.DateTime":
                            bu.Append(sql_dr.GetDateTime(i));//В данном случае дата получается  01 . 12 . 1952   00 : 00 : 00 
                            ....................
                               
                        case "System.Byte":
                            bu.Append(sql_dr.GetByte(i));
                            bu.Append(", "); 
                            break;
                    }
                    
                }//конец For
                    bu.Append(")");
                    strSQL = bu.ToString();
                    ole_cmd.CommandText = strSQL;
                    ole_cmd.Connection = ole_constr;
                    ole_cmd.ExecuteNonQuery();  
            }//Конец While