InstallScript InstallShield中的字符ASCII代码

I want to keep user from entering character > ASCII 127 in one of the password field in installer.

我想让用户在安装程序的密码字段之一中输入字符> ASCII 127。

I googled but didn't find any direct way for this, currently i'm using:

我用谷歌搜索，但没有找到任何直接的方式，目前我正在使用：

CHAR ch;
STRING ASCII;
NUMBER nASCII;

for nCount = 0 to StrLength(sPassword)
  ch = sPassword[nCount];
  sprintf(ASCII,"%d",ch);

  StrToNum(nASCII,ASCII);

  if ( nASCII > 127 )
    MessageBox("Invalid Character in Password",INFORMATION);
  endif; 

endfor;

Is there any better way to get ASCII code from a string?

有没有更好的方法从字符串中获取ASCII代码？

1 个解决方案

#1

First off, I would avoid the conversion to and from string; just compare sPassword[nCount] with 127 directly; InstallScript stores wide chars (16-bit numbers).

首先，我会避免转换为字符串;只是直接将sPassword [nCount]与127进行比较; InstallScript存储宽字符（16位数字）。

As an alternative approach, you might try calling WideCharToMultiByte with the US-ASCII code page (20127). I'm not that strong with InstallScript and am coding without the compiler, so you might have to fix an error or two, but here's the rough idea:

作为替代方法，您可以尝试使用US-ASCII代码页调用WideCharToMultiByte（20127）。我没有那么强大的InstallScript和没有编译器的编码，所以你可能需要修复一两个错误，但这是一个粗略的想法：

#define CP_US_ASCII 20127
extern prototype NUMBER Kernel32.WideCharToMultiByte(NUMBER, NUMBER, WSTRING, NUMBER, STRING, NUMBER, STRING, BYREF BOOL);

function BOOL IsSafeAscii(STRING szCheck)
    STRING szOut;
    BOOL bReplaced;
begin
    WideCharToMultiBute(CP_US_ASCII,          // only supports characters 0-127
                        WC_NO_BEST_FIT_CHARS, // or maybe 0; disallow turning accented to plain
                        szCheck,              // test string
                        StrLength(szCheck),   // length of test string
                        szOut,                // return buffer
                        StrLength(szOut),     // length of return buffer
                        "?",                  // replacement for unsupported characters
                        bReplaced);           // whether replacement was used
    return !bReplaced;
end;