delphi - 是否有类似StrToCurr的函数可以处理数千个分隔符？

Question

我有一个类似的案例as in this question。

procedure TForm2.FormCreate(Sender: TObject);
var
  S: string;
  C: Currency;
  FormatSettings: TFormatSettings;
begin
  S := '1.000.000,00';
  FormatSettings := TFormatSettings.Create;
  FormatSettings.ThousandSeparator := '.';
  FormatSettings.DecimalSeparator := ',';
  // raises an Exception which is "as designed" as per the documentation
  C := StrToCurr(S, FormatSettings);
  ShowMessage(FormatCurr(',0.00', C));
end;

引用大卫：


因此，传递包含千位分隔符的字符串是错误的
此功能。


那么，Delphi是否有任何内置函数可以解析包含千位分隔符的货币字符串？

Answer 1

该设计（缺陷）的解决方案很简单：定义自己的功能。

unit MyFixForSysUtils;

interface

function StrToCurr(const Str: string): Currency; overload;
function StrToCurr(Str: string; const FormatSettings : TFormatSettings): Currency; overload;  

implementation

uses SysUtils;

function StrToCurr(Str: string; const FormatSettings : TFormatSettings): Currency;
begin
  Str:= StringReplace(Str, FormatSettings.ThousandSeparator, '', [rfReplaceAll]);
  Result:= SysUtils.StrToCurr(Str, FormatSettings);
end;

 function StrToCurr(const Str: string): Currency;
 begin
   Result:= StrToCurr(Str, FormatSettings);
 end;

如果您确定自己的版本在范围上比sysutils更近，则无需更改代码：

uses
  SysUtils,
  MyFixForSysUtils,  <-- contains the above function
  .... other units.

现在，Delphi将选择固定功能而不是损坏的功能。

有关此概念的更多信息，请参见：Delphi interposer