我想在我的应用程序中包含批处理文件重命名功能。用户可以输入目标文件名模式(在替换模式中的一些通配符之后),我需要检查它是否将是Windows下的合法文件名。我尝试过使用像[a-zA-Z0-9_]+
这样的正则表达式,但它不包含来自各种语言的许多特定于国家的字符(例如变音等)。进行此类检查的最佳方式是什么?
发布于 2008-09-15 14:00:49
尝试使用它,并捕获错误。允许的设置可能会因文件系统或不同版本的Windows而有所不同。换句话说,如果你想知道Windows是否喜欢这个名字,就把名字交给它,然后让它告诉你。
发布于 2008-09-15 14:11:13
这是我使用的:
public static bool IsValidFileName(this string expression, bool platformIndependent)
{
string sPattern = @"^(?!^(PRN|AUX|CLOCK\$|NUL|CON|COM\d|LPT\d|\..*)(\..+)?$)[^\x00-\x1f\\?*:\"";|/]+$";
if (platformIndependent)
{
sPattern = @"^(([a-zA-Z]:|\\)\\)?(((\.)|(\.\.)|([^\\/:\*\?""\|<>\. ](([^\\/:\*\?""\|<>\. ])|([^\\/:\*\?""\|<>]*[^\\/:\*\?""\|<>\. ]))?))\\)*[^\\/:\*\?""\|<>\. ](([^\\/:\*\?""\|<>\. ])|([^\\/:\*\?""\|<>]*[^\\/:\*\?""\|<>\. ]))?$";
}
return (Regex.IsMatch(expression, sPattern, RegexOptions.CultureInvariant));
}
第一种模式创建包含无效/非法文件名和字符的正则表达式,仅适用于Windows平台。第二个做同样的事情,但确保名称在任何平台上都是合法的。
发布于 2010-08-07 00:16:57
这个类清理文件名和路径;像这样使用它
var myCleanPath = PathSanitizer.SanitizeFilename(myBadPath, ' ');
这是代码;
/// <summary>
/// Cleans paths of invalid characters.
/// </summary>
public static class PathSanitizer
{
/// <summary>
/// The set of invalid filename characters, kept sorted for fast binary search
/// </summary>
private readonly static char[] invalidFilenameChars;
/// <summary>
/// The set of invalid path characters, kept sorted for fast binary search
/// </summary>
private readonly static char[] invalidPathChars;
static PathSanitizer()
{
// set up the two arrays -- sorted once for speed.
invalidFilenameChars = System.IO.Path.GetInvalidFileNameChars();
invalidPathChars = System.IO.Path.GetInvalidPathChars();
Array.Sort(invalidFilenameChars);
Array.Sort(invalidPathChars);
}
/// <summary>
/// Cleans a filename of invalid characters
/// </summary>
/// <param name="input">the string to clean</param>
/// <param name="errorChar">the character which replaces bad characters</param>
/// <returns></returns>
public static string SanitizeFilename(string input, char errorChar)
{
return Sanitize(input, invalidFilenameChars, errorChar);
}
/// <summary>
/// Cleans a path of invalid characters
/// </summary>
/// <param name="input">the string to clean</param>
/// <param name="errorChar">the character which replaces bad characters</param>
/// <returns></returns>
public static string SanitizePath(string input, char errorChar)
{
return Sanitize(input, invalidPathChars, errorChar);
}
/// <summary>
/// Cleans a string of invalid characters.
/// </summary>
/// <param name="input"></param>
/// <param name="invalidChars"></param>
/// <param name="errorChar"></param>
/// <returns></returns>
private static string Sanitize(string input, char[] invalidChars, char errorChar)
{
// null always sanitizes to null
if (input == null) { return null; }
StringBuilder result = new StringBuilder();
foreach (var characterToTest in input)
{
// we binary search for the character in the invalid set. This should be lightning fast.
if (Array.BinarySearch(invalidChars, characterToTest) >= 0)
{
// we found the character in the array of
result.Append(errorChar);
}
else
{
// the character was not found in invalid, so it is valid.
result.Append(characterToTest);
}
}
// we're done.
return result.ToString();
}
}
https://stackoverflow.com/questions/62771
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