c#操作数据库类-sql

publicclassDataBase{#region//数据连接字符串protectedstaticstringConnectionStr="Server=127.0.0.1;DataBase=Gdd005;UserID=sa;PWD=";SqlConnectionConn=newSqlConnection(ConnectionStr);#endregion//打开数据库#regionpublicstaticvoidOpen(){try{SqlConnectionConn=newS