我需要一个强大的和简单的方法来删除非法的路径和文件字符从一个简单的字符串。我已经使用了下面的代码,但它似乎没有做任何事情,我错过了什么?
using System;
using System.IO;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string illegal = "\"M<>\"\\a/ry/ h**ad:>> a\\/:*?\"<>| li*tt|le|| la\"mb.?";
illegal = illegal.Trim(Path.GetInvalidFileNameChars());
illegal = illegal.Trim(Path.GetInvalidPathChars());
Console.WriteLine(illegal);
Console.ReadLine();
}
}
}
下面是一个用替换字符替换文件名中所有非法字符的函数:
public static string ReplaceIllegalFileChars(string FileNameWithoutPath, char ReplacementChar)
{
const string IllegalFileChars = "*?/\\:<>|\"";
StringBuilder sb = new StringBuilder(FileNameWithoutPath.Length);
char c;
for (int i = 0; i < FileNameWithoutPath.Length; i++)
{
c = FileNameWithoutPath[i];
if (IllegalFileChars.IndexOf(c) >= 0)
{
c = ReplacementChar;
}
sb.Append(c);
}
return (sb.ToString());
}
例如,下划线可以用作替换字符:
NewFileName = ReplaceIllegalFileChars(FileName, '_');
下面的代码片段应该对。net 3及更高版本有所帮助。
using System.IO;
using System.Text.RegularExpressions;
public static class PathValidation
{
private static string pathValidatorExpression = "^[^" + string.Join("", Array.ConvertAll(Path.GetInvalidPathChars(), x => Regex.Escape(x.ToString()))) + "]+$";
private static Regex pathValidator = new Regex(pathValidatorExpression, RegexOptions.Compiled);
private static string fileNameValidatorExpression = "^[^" + string.Join("", Array.ConvertAll(Path.GetInvalidFileNameChars(), x => Regex.Escape(x.ToString()))) + "]+$";
private static Regex fileNameValidator = new Regex(fileNameValidatorExpression, RegexOptions.Compiled);
private static string pathCleanerExpression = "[" + string.Join("", Array.ConvertAll(Path.GetInvalidPathChars(), x => Regex.Escape(x.ToString()))) + "]";
private static Regex pathCleaner = new Regex(pathCleanerExpression, RegexOptions.Compiled);
private static string fileNameCleanerExpression = "[" + string.Join("", Array.ConvertAll(Path.GetInvalidFileNameChars(), x => Regex.Escape(x.ToString()))) + "]";
private static Regex fileNameCleaner = new Regex(fileNameCleanerExpression, RegexOptions.Compiled);
public static bool ValidatePath(string path)
{
return pathValidator.IsMatch(path);
}
public static bool ValidateFileName(string fileName)
{
return fileNameValidator.IsMatch(fileName);
}
public static string CleanPath(string path)
{
return pathCleaner.Replace(path, "");
}
public static string CleanFileName(string fileName)
{
return fileNameCleaner.Replace(fileName, "");
}
}