strMonth:String;//为全局变量 procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char); var iMonth : Integer; begin if key in ['0'..'9'] then strMonth := Edit1.Text; iMonth := StrToInt(strMonth); if (iMonth = 0) and (iMonth > 12) then begin ShowMessage('您输入的月份不对,请重新输入'); Exit; end; end;
strMonth,strDay :String;//为全局变量 procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char); var iMonth : Integer; begin if key in ['0'..'9'] then strMonth := Edit1.Text; iMonth := StrToInt(strMonth); if (iMonth = 0) and (iMonth > 12) then begin ShowMessage('您输入的月份不对,请重新输入'); Exit; end; end;procedure TForm1.Edit2KeyPress(Sender: TObject; var Key: Char); var iMonth : Integer; begin if key in ['0'..'9'] then strDay := Edit1.Text; iMonth := StrToInt(strMonth); if (iMonth = 0) and (iMonth > 31) then begin ShowMessage('您输入的日期不对,请重新输入'); Exit; end; end;
if (strtointdef(edit.text,0)<1) or (strtointdef(edit.text,0)>12) then showmessage('只能输入1~12!'); 在onChange事件上面写以上代码。 不过,有个TFilterComboBox控件,在FileCtrl单元,可视化控件在samples下面。 可以控制最大值,最小值
设置 edit1.MaxLength:=2; procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);//只能输入1-12 begin if (key in ['0'..'9']) then begin if (length(edit1.Text)=0) and (key='0') then key:=chr(0); if (length(edit1.Text)=1) and not(key in ['0','1','2']) then key:=chr(0); end else key:=chr(0);end;
procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
var
iMonth : Integer;
begin
if key in ['0'..'9'] then
strMonth := Edit1.Text;
iMonth := StrToInt(strMonth);
if (iMonth = 0) and (iMonth > 12) then
begin
ShowMessage('您输入的月份不对,请重新输入');
Exit;
end;
end;
procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
var
iMonth : Integer;
begin
if key in ['0'..'9'] then
strMonth := Edit1.Text;
iMonth := StrToInt(strMonth);
if (iMonth = 0) and (iMonth > 12) then
begin
ShowMessage('您输入的月份不对,请重新输入');
Exit;
end;
end;procedure TForm1.Edit2KeyPress(Sender: TObject; var Key: Char);
var
iMonth : Integer;
begin
if key in ['0'..'9'] then
strDay := Edit1.Text;
iMonth := StrToInt(strMonth);
if (iMonth = 0) and (iMonth > 31) then
begin
ShowMessage('您输入的日期不对,请重新输入');
Exit;
end;
end;
showmessage('只能输入1~12!');
在onChange事件上面写以上代码。
不过,有个TFilterComboBox控件,在FileCtrl单元,可视化控件在samples下面。
可以控制最大值,最小值
procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);//只能输入1-12
begin
if (key in ['0'..'9']) then
begin
if (length(edit1.Text)=0) and (key='0') then
key:=chr(0);
if (length(edit1.Text)=1) and not(key in ['0','1','2']) then
key:=chr(0);
end
else
key:=chr(0);end;