为什么TFormatSettings的行为不符合预期? [英] Why is TFormatSettings not behaving as expected?
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问题描述
我希望以下代码可以工作:
I expect the following code to work:
program Project3;
{$APPTYPE CONSOLE}
{$R *.res}
uses
System.SysUtils;
var
FS: TFormatSettings;
const
DF = 'yyyymmdd';
begin
try
WriteLn(FormatDateTime(DF, Now));
FS := TFormatSettings.Create;
FS.ShortDateFormat := DF;
WriteLn(StrToDate('20121219', FS));
ReadLn;
except
on E: Exception do
Writeln(E.ClassName, ': ', E.Message);
end;
end.
为什么抛出异常,说 20121219不是有效日期?那不是传递TFormatSettings应该做的到底吗?
Why is it throwing an exception, saying that '20121219' is not a valid date? Isn't that exactly what passing the TFormatSettings is supposed to do?
推荐答案
StrToDate()需要在FS.DateSeparator中定义的分隔符:Char;因此不能为空。
StrToDate() needs the separator which is defined in FS.DateSeparator: Char; and so can't be empty.
参考:
http://docwiki.embarcadero.com/Libraries/XE3/en/System.SysUtils.StrToDate
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