delphi edit 固定小数位数的实现(形如：1,000,000.10)

procedure Tfrm_jz.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if (key in ['0'..'9',#8,#13]) then
begin
if key=#13 then
begin
if length(edit1.Text)>2 then
edit1.Text:=copy(edit1.Text ,1,(length(edit1.Text)-2))+'.'+copy(edit1.Text ,(length(edit1.Text)-1),2) ;
if length(edit1.Text)=2 then
edit1.Text:='0.'+edit1.Text;
if length(edit1.Text)=1 then
edit1.Text:='0.0'+edit1.Text;
edit2.SetFocus;
end
end
else
key:=#0;
end;

delphi edit 固定小数位数的实现方法的改进
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procedure Tfrm_jz.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if (key in ['0'..'9',#46,#13]) then
begin
if (SubStrConut(Edit1.Text,'.')=1) and (key in [#46]) then
key:=#0;
if key=#13 then
begin
if (pos(',',edit1.text)=0) and (edit1.text<>'') then
edit1.Text:=formatfloat('#,##0.00',strtofloat(edit1.Text));
edit2.SetFocus;
end;
end
else if key in [#8] then
edit1.text:=''
else
key:=#0;
end;

delphi edit 固定小数位数的实现方法的改进(解决无法输入负数的问题)
－－－－－－－－－－－－－－－－－－－－－－－－

procedure Tfrm_jz.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if (key in ['0'..'9',#45,#46,#13]) then
begin
if (SubStrConut(Edit1.Text,'.')=1) and (key in [#46]) then
key:=#0;
if (SubStrConut(Edit1.Text,'-')=1) and (key in [#45]) then
key:=#0;
if key=#13 then
begin
if (pos(',',edit1.text)=0) and (edit1.text<>'') then
if (pos('-',edit1.text)=0) or (pos('-',edit1.text)=1) then
begin
edit1.Text:=formatfloat('#,##0.00',strtofloat(edit1.Text));
edit2.SetFocus;
end;
end;
end
else if key in [#8] then
edit1.text:=''
else
key:=#0;
end;