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循环遍历同类控件:
form1中有groupbox1,内有多个speedbutton,控制其同时按下。 var i:integer; begin for i:=0 to form1.groupbox1.controlcount-1 do if form1.groupbox1.controls[i] is tspeedbutton then begin tspeedbutton(form1.groupbox1.controls[i]).allowallup:=true; tspeedbutton(form1.groupbox1.controls[i]).groupindex:=i+1; tspeedbutton(form1.groupbox1.controls[i]).down:=true; end;
结合数据库使用,表示表rz中的rz字段(bit),为1则按下,为0则抬起。 var i:integer; begin i:=0; while not adotable1.eof then if adotable1.fields[1].asboolen=true then
begin tspeedbutton(form1.groupbox1.controls[i]).allowallup:=true; tspeedbutton(form1.groupbox1.controls[i]).groupindex:=i+1; tspeedbutton(form1.groupbox1.controls[i]).down:=true; end else
begin tspeedbutton(form1.groupbox1.controls[i]).allowallup:=true; tspeedbutton(form1.groupbox1.controls[i]).groupindex:=i+1; tspeedbutton(form1.groupbox1.controls[i]).down:=false; end; inc(i); adotable1.next; end;
遍历Panel组件上的所有控件:
procedure frmMain.CLS; //主窗体自定义事件CLS
var i:integer; begin for i:=0 to panel5.ControlCount -1 do begin if panel5.Controls[i] is TEdit then //Edit组件 begin ((panel5.Controls[i]) as TEdit).Text:=''; ((panel5.Controls[i]) as TEdit).Enabled:=true; end else if panel5.Controls[i] is TComboBox then //ComboBox组件 begin ((panel5.Controls[i]) as TComboBox).Text:=''; ((panel5.Controls[i]) as TComboBox).Enabled:=true; end else if panel5.Controls[i] is TDateTimePicker then //DateTimePicker组件 begin ((panel5.Controls[i]) as TDateTimePicker).Enabled:=true; ((panel5.Controls[i]) as TDateTimePicker).DateTime:=now(); end; end; end; 这个过程主要是清空panel5组件Edit、ComboBox组件Text内容、把DateTimePicker组件日期设为当前日期,并使panel5所有控件可用 ......
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2023-10-27
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