批量删除数据库中的字段

try
            {
                ArrayList sqlList = new ArrayList();
                string StrSqlTables = "select d.name,a.name FROM   syscolumns   a    left   join   systypes   b   on   a.xtype=b.xusertype " +
                                      " inner   join   sysobjects   d   on   a.id=d.id     and   d.xtype='U'   and     d.name<>'dtproperties' " +
                                      "  and a.name = 'rowguid' ";

                string StrSql = "";

                string table_NAME = "";
                DataSet ds = DbHelperSQL.Query(StrSqlTables);
                foreach (DataRow row in ds.Tables[0].Rows)
                {
                    table_NAME = row.ItemArray[0].ToString();
                    StrSql = "ALTER TABLE " + table_NAME + " DROP COLUMN rowguid ; ";
                    sqlList.Add(StrSql);
                }
                DbHelperSQL.ExecuteSqlTran(sqlList);
                MessageBox.Show("删除成功", "提示!");
            }
            catch (Exception ex)
            {
                MessageBox.Show("删除失败  "+ex.Message, "错误!");
            }