Inno 设置：文件大小

Question

我需要获取文件的大小。我需要检查文件是否超过 100b 示例：

If FileSize('C:\Program Files\MyProgramm\MyApp.exe') > 100 
   then
     msgbox ('File more then 100', mbinformation,mb_ok)
   else 
     msgbox ('File less then 100', mbinformation,mb_ok)

我看起来 function FileSize(const Name: String; var Size: Integer): Boolean; ，但它只有在我需要检查时才有效 - 大小是否正确。但我无法检查更多或更少

Answer 1

函数原型中的var关键字意味着你需要声明一个给定类型的变量并将其传递给函数。然后该变量接收该值。这是FileSize 函数的示例：

var
  Size: Integer;
begin
  // the second parameter of the FileSize function is defined as 'var Size: Integer',
  // so we need to pass there a variable of type Integer, which is the Size variable
  // declared above
  if FileSize('C:\TheFile.any', Size) then
  begin
    if Size > 100 then
      MsgBox('The file is bigger than 100B in size.', mbInformation, MB_OK)
    else
      MsgBox('The file is smaller than 100B in size.', mbInformation, MB_OK);
  end
  else
    MsgBox('Reading the file size failed.', mbError, MB_OK);
end;