cannot perform this operation on a closed dataset英文怎么读?是什么意思?

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• cannot perform this operation on a closed dataset英文怎么读?是什么意思?
• cannot perform this operation on a closed dataset英文怎么读?是什么意思?
• It will be __enough A.quite B.very C.much D.so 谁知道?help要有解释
• 运行这段代码出现Cannot perform this operation on an open dataset procedure Tfrm_in.edt_OKClick(Sender:TObject);var y,m:String;beginy:=formatdatetime('yyyy',now);m:=formatdatetime('m',now);tryif (strtoint(edt_year.Text)>strtoint(y))or((strtoint(edt_year.Text)=strtoint(y))and (strtoint(edt_month.Text)>=strtoint(m))) thenbeginshowmessage('日期超前!');exit;end;exceptshowmessage('请输入正确的月份!');exit;end;month:='月进货'+edt_year.Text+'-'+edt_month.Text;with data_month dobegi