delphi 根据特殊符号字符获取字符串前或后的字符
function GetBefore(substr, str:string):string;
{©Drkb v.3(2007): www.drkb.ru,
®Vit (Vitaly Nevzorov) - nevzorov@yahoo.com}
begin
if pos(substr,str)>0 then
result:=copy(str,1,pos(substr,str)-1)
else
result:='';
end;
function GetAfter(substr, str:string):string;
{©Drkb v.3(2007): www.drkb.ru,
®Vit (Vitaly Nevzorov) - nevzorov@yahoo.com}
begin
if pos(substr,str)>0 then
result:=copy(str,pos(substr,str)+length(substr),length(str))
else
result:='';
end;
演示:
1)
GetBefore('-', 'Total-2.00$') // 结果 "Total"
2)
GetAfter('-', 'Total-2.00$') // 结果 "2.00$"
3)
GetBefore('$',GetAfter('-', 'Total-2.00$ (общая сумма)') // 结果 "2.00"
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