C# 如何从路径和文件名中删除非法字符？
我需要一种健壮且简单的方法来从简单字符串中删除非法路径和文件字符。我使用了下面的代码，但它似乎没有做任何事情，我遗漏了什么C# 如何从路径和文件名中删除非法字符？,c#,string,path,directory,C#,String,Path,Directory,我需要一种健壮且简单的方法来从简单字符串中删除非法路径和文件字符。我使用了下面的代码，但它似乎没有做任何事情，我遗漏了什么 using System; using System.IO; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { string illegal = "\"M<>\"\\a/ry/
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();
}
}
}
使用系统；
使用System.IO；
命名空间控制台应用程序1
{
班级计划
{
静态void Main（字符串[]参数）
{
字符串非法=“\'M\”\\a/ry/h**ad:>>a\\/：*？\”| li*tt|le|la\'mb.？”；
非法=非法的.Trim（Path.GetInvalidFileNameChars（））；
非法=非法的.Trim（Path.GetInvalidPathChars（））；
控制台写入线（非法）；
Console.ReadLine（）；
}
}
}
。注意：您可以使用此问题中的正则表达式删除带有正则表达式替换的字符（如果您确实需要这样做）。尝试类似的方法
string illegal = "\"M\"\\a/ry/ h**ad:>> a\\/:*?\"| li*tt|le|| la\"mb.?";
string invalid = new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());
foreach (char c in invalid)
{
illegal = illegal.Replace(c.ToString(), "");
}
string illegal = "\"M\"\\a/ry/ h**ad:>> a\\/:*?\"| li*tt|le|| la\"mb.?";
string regexSearch = new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());
Regex r = new Regex(string.Format("[{0}]", Regex.Escape(regexSearch)));
illegal = r.Replace(illegal, "");
尽管如此，我们还是要问一个问题，为什么要这么做。我认为使用正则表达式验证并指定允许使用哪些字符要容易得多，而不是试图检查所有的坏字符。 请参阅以下链接：
另外，搜索“正则表达式编辑器”，它们帮助很大。有些甚至可以用c语言为您输出代码。我使用正则表达式来实现这一点。首先，我动态构建正则表达式
string regex = string.Format(
"[{0}]",
Regex.Escape(new string(Path.GetInvalidFileNameChars())));
Regex removeInvalidChars = new Regex(regex, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.CultureInvariant);
if ( fileName.IndexOfAny(Path.GetInvalidFileNameChars()) > -1 )
{
throw new ArgumentException();
}
private static string CleanFileName(string fileName)
{
return Path.GetInvalidFileNameChars().Aggregate(fileName, (current, c) => current.Replace(c.ToString(), string.Empty));
}
下面是一段代码片段，它应该对.NET3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, "");
}
}
您可以使用Linq删除非法字符，如下所示：
var invalidChars = Path.GetInvalidFileNameChars();
var invalidCharsRemoved = stringWithInvalidChars
.Where(x => !invalidChars.Contains(x))
.ToArray();
string illegal = "\"M<>\"\\a/ry/ h**ad:>> a\\/:*?\"<>| li*tt|le|| la\"mb.?";
string legal = ReplaceInvalidChars(illegal);
这是评论中提到的所需编辑的外观：
var invalidChars = Path.GetInvalidFileNameChars();
string invalidCharsRemoved = new string(stringWithInvalidChars
.Where(x => !invalidChars.Contains(x))
.ToArray());
我绝对喜欢杰夫·耶茨的想法。如果您稍微修改它，它将完美工作：
string regex = String.Format("[{0}]", Regex.Escape(new string(Path.GetInvalidFileNameChars())));
Regex removeInvalidChars = new Regex(regex, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.CultureInvariant);
改进只是为了避开自动生成的正则表达式。我使用Linq清理文件名。您可以很容易地扩展它来检查有效路径
private static string CleanFileName(string fileName)
{
return Path.GetInvalidFileNameChars().Aggregate(fileName, (current, c) => current.Replace(c.ToString(), string.Empty));
}
这些都是很好的解决方案，但它们都依赖于
Path.GetInvalidFileNameChars方法没有任何好处。它包含完全相同的注释。以上大多数解决方案都将路径和文件名的非法字符组合在一起，这是错误的（即使当前两个调用都返回相同的字符集）。我会首先将路径+文件名拆分为路径和文件名，然后对其中一个应用适当的设置，然后再次将两者合并
wvd_vegt从用户输入中删除非法字符的最佳方法是使用正则表达式类替换非法字符，在代码隐藏中创建方法，或者使用RegularExpression控件在客户端验证
public string RemoveSpecialCharacters(string str)
{
return Regex.Replace(str, "[^a-zA-Z0-9_]+", "_", RegexOptions.Compiled);
}
<asp:RegularExpressionValidator ID="regxFolderName"
runat="server"
ErrorMessage="Enter folder name with a-z A-Z0-9_"
ControlToValidate="txtFolderName"
Display="Dynamic"
ValidationExpression="^[a-zA-Z0-9_]*$"
ForeColor="Red">
我写这个怪物是为了好玩，它可以让你往返：
public static class FileUtility
{
private const char PrefixChar = '%';
private static readonly int MaxLength;
private static readonly Dictionary<char,char[]> Illegals;
static FileUtility()
{
List<char> illegal = new List<char> { PrefixChar };
illegal.AddRange(Path.GetInvalidFileNameChars());
MaxLength = illegal.Select(x => ((int)x).ToString().Length).Max();
Illegals = illegal.ToDictionary(x => x, x => ((int)x).ToString("D" + MaxLength).ToCharArray());
}
public static string FilenameEncode(string s)
{
var builder = new StringBuilder();
char[] replacement;
using (var reader = new StringReader(s))
{
while (true)
{
int read = reader.Read();
if (read == -1)
break;
char c = (char)read;
if(Illegals.TryGetValue(c,out replacement))
{
builder.Append(PrefixChar);
builder.Append(replacement);
}
else
{
builder.Append(c);
}
}
}
return builder.ToString();
}
public static string FilenameDecode(string s)
{
var builder = new StringBuilder();
char[] buffer = new char[MaxLength];
using (var reader = new StringReader(s))
{
while (true)
{
int read = reader.Read();
if (read == -1)
break;
char c = (char)read;
if (c == PrefixChar)
{
reader.Read(buffer, 0, MaxLength);
var encoded =(char) ParseCharArray(buffer);
builder.Append(encoded);
}
else
{
builder.Append(c);
}
}
}
return builder.ToString();
}
public static int ParseCharArray(char[] buffer)
{
int result = 0;
foreach (char t in buffer)
{
int digit = t - '0';
if ((digit < 0) || (digit > 9))
{
throw new ArgumentException("Input string was not in the correct format");
}
result *= 10;
result += digit;
}
return result;
}
}
公共静态类FileUtility
{
private const char PrefixChar='%'；
私有静态只读int MaxLength；
私有静态只读字典非法者；
静态FileUtility（）
{
列表非法=新列表{PrefixChar}；
非法.AddRange（路径.GetInvalidFileNameChars（））；
MaxLength=非法。选择（x=>（（int）x）.ToString（）.Length.Max（）；
Illegals=非法.ToDictionary（x=>x，x=>（（int）x）.ToString（“D”+MaxLength）.toCharray（））；
}
公共静态字符串FilenameEncode（字符串s）
{
var builder=新的StringBuilder（）；
字符[]替换；
使用（变量读取器=新的StringReader））
{
while（true）
{
int read=reader.read（）；
如果（读取==-1）
打破
char c=（char）read；
if（非法的TryGetValue（c，输出替换））
{
builder.Append（PrefixChar）；
附加（替换）；
}
其他的
{
附加（c）；
}
}
}
返回builder.ToString（）；
}
公共静态字符串FilenameDecode（字符串s）
{
var builder=新的StringBuilder（）；
char[]buffer=新字符[MaxLength]；
使用（变量读取器=新的StringReader））
{
while（true）
{
int read=reader.read（）；
如果（读取==-1）
打破
char c=（char）read；
if（c==PrefixChar）
{
reader.Read（缓冲区，0，最大长度）；
var encoded=（char）ParseCharArray（缓冲区）；
builder.Append（编码）；
}
其他的
{
附加（c）；
var cleanFileName = string.Join("", fileName.Split(Path.GetInvalidFileNameChars()));
var cleanPath = string.Join("", path.Split(Path.GetInvalidPathChars()));
public string RemoveInvalidChars(string filename)
{
return string.Concat(filename.Split(Path.GetInvalidFileNameChars()));
}
public string ReplaceInvalidChars(string filename)
{
return string.Join("_", filename.Split(Path.GetInvalidFileNameChars()));
}
static string SanitiseFilename(string key)
{
var invalidChars = Path.GetInvalidFileNameChars();
var sb = new StringBuilder();
foreach (var c in key)
{
var invalidCharIndex = -1;
for (var i = 0; i < invalidChars.Length; i++)
{
if (c == invalidChars[i])
{
invalidCharIndex = i;
}
}
if (invalidCharIndex > -1)
{
sb.Append("_").Append(invalidCharIndex);
continue;
}
if (c == '_')
{
sb.Append("__");
continue;
}
sb.Append(c);
}
return sb.ToString();
}
<abc -> abc
>abc -> abc
public static string ReplaceInvalidFileNameChars(string s)
{
char[] invalidFileNameChars = System.IO.Path.GetInvalidFileNameChars();
foreach (char c in invalidFileNameChars)
s = s.Replace(c.ToString(), "[" + Array.IndexOf(invalidFileNameChars, c) + "]");
return s;
}
<abc -> [1]abc
>abc -> [2]abc
private static readonly HashSet<char> invalidFileNameChars = new HashSet<char>(Path.GetInvalidFileNameChars());
public static string RemoveInvalidFileNameChars(string name)
{
if (!name.Any(c => invalidFileNameChars.Contains(c))) {
return name;
}
return new string(name.Where(c => !invalidFileNameChars.Contains(c)).ToArray());
}
private static string CleanPath(string path)
{
string regexSearch = new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());
Regex r = new Regex(string.Format("[{0}]", Regex.Escape(regexSearch)));
List<string> split = path.Split('\\').ToList();
string returnValue = split.Aggregate(string.Empty, (current, s) => current + (r.Replace(s, "") + @"\"));
returnValue = returnValue.TrimEnd('\\');
return returnValue;
}
public static class PathExtensions
{
private static HashSet<char> _invalidFilenameChars;
private static HashSet<char> InvalidFilenameChars
{
get { return _invalidFilenameChars ?? (_invalidFilenameChars = new HashSet<char>(Path.GetInvalidFileNameChars())); }
}
/// <summary>Replaces characters in <c>text</c> that are not allowed in file names with the
/// specified replacement character.</summary>
/// <param name="text">Text to make into a valid filename. The same string is returned if
/// it is valid already.</param>
/// <param name="replacement">Replacement character, or NULL to remove bad characters.</param>
/// <param name="fancyReplacements">TRUE to replace quotes and slashes with the non-ASCII characters ” and ⁄.</param>
/// <returns>A string that can be used as a filename. If the output string would otherwise be empty, "_" is returned.</returns>
public static string ToValidFilename(this string text, char? replacement = '_', bool fancyReplacements = false)
{
StringBuilder sb = new StringBuilder(text.Length);
HashSet<char> invalids = InvalidFilenameChars;
bool changed = false;
for (int i = 0; i < text.Length; i++)
{
char c = text[i];
if (invalids.Contains(c))
{
changed = true;
char repl = replacement ?? '\0';
if (fancyReplacements)
{
if (c == '"') repl = '”'; // U+201D right double quotation mark
else if (c == '\'') repl = '’'; // U+2019 right single quotation mark
else if (c == '/') repl = '⁄'; // U+2044 fraction slash
}
if (repl != '\0')
sb.Append(repl);
}
else
sb.Append(c);
}
if (sb.Length == 0)
return "_";
return changed ? sb.ToString() : text;
}
/// <summary>
/// Returns TRUE if the specified path is a valid, local filesystem path.
/// </summary>
/// <param name="pathString"></param>
/// <returns></returns>
public static bool IsValidLocalPath(this string pathString)
{
// From solution at https://stackoverflow.com/a/11636052/949129
Uri pathUri;
Boolean isValidUri = Uri.TryCreate(pathString, UriKind.Absolute, out pathUri);
return isValidUri && pathUri != null && pathUri.IsLoopback;
}
}
public static class StringExtensions
{
public static string RemoveUnnecessary(this string source)
{
string result = string.Empty;
string regex = new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());
Regex reg = new Regex(string.Format("[{0}]", Regex.Escape(regex)));
result = reg.Replace(source, "");
return result;
}
}
public static class FileNameCorrector
{
private static HashSet<char> invalid = new HashSet<char>(Path.GetInvalidFileNameChars());
public static string ToValidFileName(this string name, char replacement = '\0')
{
var builder = new StringBuilder();
foreach (var cur in name)
{
if (cur > 31 && cur < 128 && !invalid.Contains(cur))
{
builder.Append(cur);
}
else if (replacement != '\0')
{
builder.Append(replacement);
}
}
return builder.ToString();
}
}
public static class FileNameExtensions
{
private static readonly Lazy<string[]> InvalidFileNameChars =
new Lazy<string[]>(() => Path.GetInvalidPathChars()
.Union(Path.GetInvalidFileNameChars()
.Union(new[] { '+', '#' })).Select(c => c.ToString(CultureInfo.InvariantCulture)).ToArray());
private static readonly HashSet<string> ProhibitedNames = new HashSet<string>
{
@"aux",
@"con",
@"clock$",
@"nul",
@"prn",
@"com1",
@"com2",
@"com3",
@"com4",
@"com5",
@"com6",
@"com7",
@"com8",
@"com9",
@"lpt1",
@"lpt2",
@"lpt3",
@"lpt4",
@"lpt5",
@"lpt6",
@"lpt7",
@"lpt8",
@"lpt9"
};
public static bool IsValidFileName(string fileName)
{
return !string.IsNullOrWhiteSpace(fileName)
&& fileName.All(o => !IsInvalidFileNameChar(o))
&& !IsProhibitedName(fileName);
}
public static bool IsProhibitedName(string fileName)
{
return ProhibitedNames.Contains(fileName.ToLower(CultureInfo.InvariantCulture));
}
private static string ReplaceInvalidFileNameSymbols([CanBeNull] this string value, string replacementValue)
{
if (value == null)
{
return null;
}
return InvalidFileNameChars.Value.Aggregate(new StringBuilder(value),
(sb, currentChar) => sb.Replace(currentChar, replacementValue)).ToString();
}
public static bool IsInvalidFileNameChar(char value)
{
return InvalidFileNameChars.Value.Contains(value.ToString(CultureInfo.InvariantCulture));
}
public static string GetValidFileName([NotNull] this string value)
{
return GetValidFileName(value, @"_");
}
public static string GetValidFileName([NotNull] this string value, string replacementValue)
{
if (string.IsNullOrWhiteSpace(value))
{
throw new ArgumentException(@"value should be non empty", nameof(value));
}
if (IsProhibitedName(value))
{
return (string.IsNullOrWhiteSpace(replacementValue) ? @"_" : replacementValue) + value;
}
return ReplaceInvalidFileNameSymbols(value, replacementValue);
}
public static string GetFileNameError(string fileName)
{
if (string.IsNullOrWhiteSpace(fileName))
{
return CommonResources.SelectReportNameError;
}
if (IsProhibitedName(fileName))
{
return CommonResources.FileNameIsProhibited;
}
var invalidChars = fileName.Where(IsInvalidFileNameChar).Distinct().ToArray();
if(invalidChars.Length > 0)
{
return string.Format(CultureInfo.CurrentCulture,
invalidChars.Length == 1 ? CommonResources.InvalidCharacter : CommonResources.InvalidCharacters,
StringExtensions.JoinQuoted(@",", @"'", invalidChars.Select(c => c.ToString(CultureInfo.CurrentCulture))));
}
return string.Empty;
}
}
public static string CleanIllegalName(string p_testName) => new Regex(string.Format("[{0}]", Regex.Escape(new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars())))).Replace(p_testName, "");
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());
}
NewFileName = ReplaceIllegalFileChars(FileName, '_');
private static HashSet<char> _invalidCharsHash;
private static HashSet<char> InvalidCharsHash
{
get { return _invalidCharsHash ?? (_invalidCharsHash = new HashSet<char>(Path.GetInvalidFileNameChars())); }
}
private static string ReplaceInvalidChars(string fileName, string newValue)
{
char newChar = newValue[0];
char[] chars = fileName.ToCharArray();
for (int i = 0; i < chars.Length; i++)
{
char c = chars[i];
if (InvalidCharsHash.Contains(c))
chars[i] = newChar;
}
return new string(chars);
}
string illegal = "\"M<>\"\\a/ry/ h**ad:>> a\\/:*?\"<>| li*tt|le|| la\"mb.?";
string legal = ReplaceInvalidChars(illegal);
_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
private static string RemoveInvalidChars(string fileName, string newValue)
{
char newChar = string.IsNullOrEmpty(newValue) ? char.MinValue : newValue[0];
bool remove = newChar == char.MinValue;
char[] chars = fileName.ToCharArray();
char[] newChars = new char[chars.Length];
int i2 = 0;
for (int i = 0; i < chars.Length; i++)
{
char c = chars[i];
if (InvalidCharsHash.Contains(c))
{
if (!remove)
newChars[i2++] = newChar;
}
else
newChars[i2++] = c;
}
return new string(newChars, 0, i2);
}
============Test1===============
Elapsed=00:00:01.6665595
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test2===============
Elapsed=00:00:01.7526835
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test3===============
Elapsed=00:00:05.2306227
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test4===============
Elapsed=00:00:14.8203696
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test5===============
Elapsed=00:00:01.8273760
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test6===============
Elapsed=00:00:05.4249985
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test7===============
Elapsed=00:00:07.5653833
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test8===============
Elapsed=00:12:23.1410106
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test9===============
Elapsed=00:00:02.1016708
Result=_M ____a_ry_ h__ad___ a_________ li_tt_le__ la_mb._
============Test10===============
Elapsed=00:00:05.0987225
Result=M ary had a little lamb.
============Test11===============
Elapsed=00:00:06.8004289
Result=M ary had a little lamb.
============Test1===============
Elapsed=00:00:01.6945352
Result= M a ry h ad a li tt le la mb.
============Test2===============
Elapsed=00:00:01.4798049
Result=M ary had a little lamb.
============Test3===============
Elapsed=00:00:04.0415688
Result=M ary had a little lamb.
============Test4===============
Elapsed=00:00:14.3397960
Result=M ary had a little lamb.
============Test5===============
Elapsed=00:00:01.6782505
Result=M ary had a little lamb.
============Test6===============
Elapsed=00:00:04.9251707
Result=M ary had a little lamb.
============Test7===============
Elapsed=00:00:07.9562379
Result=M ary had a little lamb.
============Test8===============
Elapsed=00:12:16.2918943
Result=M ary had a little lamb.
============Test9===============
Elapsed=00:00:02.0770277
Result=M ary had a little lamb.
============Test10===============
Elapsed=00:00:05.2721232
Result=M ary had a little lamb.
============Test11===============
Elapsed=00:00:05.2802903
Result=M ary had a little lamb.
private static HashSet<char> _invalidCharsHash;
private static HashSet<char> InvalidCharsHash
{
get { return _invalidCharsHash ?? (_invalidCharsHash = new HashSet<char>(Path.GetInvalidFileNameChars())); }
}
private static string _invalidCharsValue;
private static string InvalidCharsValue
{
get { return _invalidCharsValue ?? (_invalidCharsValue = new string(Path.GetInvalidFileNameChars())); }
}
private static char[] _invalidChars;
private static char[] InvalidChars
{
get { return _invalidChars ?? (_invalidChars = Path.GetInvalidFileNameChars()); }
}
static void Main(string[] args)
{
string testPath = "\"M <>\"\\a/ry/ h**ad:>> a\\/:*?\"<>| li*tt|le|| la\"mb.?";
int max = 1000000;
string newValue = "";
TimeBenchmark(max, Test1, testPath, newValue);
TimeBenchmark(max, Test2, testPath, newValue);
TimeBenchmark(max, Test3, testPath, newValue);
TimeBenchmark(max, Test4, testPath, newValue);
TimeBenchmark(max, Test5, testPath, newValue);
TimeBenchmark(max, Test6, testPath, newValue);
TimeBenchmark(max, Test7, testPath, newValue);
TimeBenchmark(max, Test8, testPath, newValue);
TimeBenchmark(max, Test9, testPath, newValue);
TimeBenchmark(max, Test10, testPath, newValue);
TimeBenchmark(max, Test11, testPath, newValue);
Console.Read();
}
private static void TimeBenchmark(int maxLoop, Func<string, string, string> func, string testString, string newValue)
{
var sw = new Stopwatch();
sw.Start();
string result = string.Empty;
for (int i = 0; i < maxLoop; i++)
result = func?.Invoke(testString, newValue);
sw.Stop();
Console.WriteLine($"============{func.Method.Name}===============");
Console.WriteLine("Elapsed={0}", sw.Elapsed);
Console.WriteLine("Result={0}", result);
Console.WriteLine("");
}
private static string Test1(string fileName, string newValue)
{
char newChar = string.IsNullOrEmpty(newValue) ? char.MinValue : newValue[0];
char[] chars = fileName.ToCharArray();
for (int i = 0; i < chars.Length; i++)
{
if (InvalidCharsHash.Contains(chars[i]))
chars[i] = newChar;
}
return new string(chars);
}
private static string Test2(string fileName, string newValue)
{
char newChar = string.IsNullOrEmpty(newValue) ? char.MinValue : newValue[0];
bool remove = newChar == char.MinValue;
char[] chars = fileName.ToCharArray();
char[] newChars = new char[chars.Length];
int i2 = 0;
for (int i = 0; i < chars.Length; i++)
{
char c = chars[i];
if (InvalidCharsHash.Contains(c))
{
if (!remove)
newChars[i2++] = newChar;
}
else
newChars[i2++] = c;
}
return new string(newChars, 0, i2);
}
private static string Test3(string filename, string newValue)
{
foreach (char c in InvalidCharsValue)
{
filename = filename.Replace(c.ToString(), newValue);
}
return filename;
}
private static string Test4(string filename, string newValue)
{
Regex r = new Regex(string.Format("[{0}]", Regex.Escape(InvalidCharsValue)));
filename = r.Replace(filename, newValue);
return filename;
}
private static string Test5(string filename, string newValue)
{
return string.Join(newValue, filename.Split(InvalidChars));
}
private static string Test6(string fileName, string newValue)
{
return InvalidChars.Aggregate(fileName, (current, c) => current.Replace(c.ToString(), newValue));
}
private static string Test7(string fileName, string newValue)
{
string regex = string.Format("[{0}]", Regex.Escape(InvalidCharsValue));
return Regex.Replace(fileName, regex, newValue, RegexOptions.Compiled);
}
private static string Test8(string fileName, string newValue)
{
string regex = string.Format("[{0}]", Regex.Escape(InvalidCharsValue));
Regex removeInvalidChars = new Regex(regex, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.CultureInvariant);
return removeInvalidChars.Replace(fileName, newValue);
}
private static string Test9(string fileName, string newValue)
{
StringBuilder sb = new StringBuilder(fileName.Length);
bool changed = false;
for (int i = 0; i < fileName.Length; i++)
{
char c = fileName[i];
if (InvalidCharsHash.Contains(c))
{
changed = true;
sb.Append(newValue);
}
else
sb.Append(c);
}
if (sb.Length == 0)
return newValue;
return changed ? sb.ToString() : fileName;
}
private static string Test10(string fileName, string newValue)
{
if (!fileName.Any(c => InvalidChars.Contains(c)))
{
return fileName;
}
return new string(fileName.Where(c => !InvalidChars.Contains(c)).ToArray());
}
private static string Test11(string fileName, string newValue)
{
string invalidCharsRemoved = new string(fileName
.Where(x => !InvalidChars.Contains(x))
.ToArray());
return invalidCharsRemoved;
}
StringHelper.RemoveInvalidCharacters 1: 451 ms
StringHelper.RemoveInvalidCharacters 2: 7139 ms
StringHelper.RemoveInvalidCharacters 3: 2447 ms
StringHelper.RemoveInvalidCharacters 4: 3733 ms
StringHelper.RemoveInvalidCharacters 5: 11689 ms (==> Regex!)
public static string RemoveInvalidCharacters(string content, char replace = '_', bool doNotReplaceBackslashes = false)
{
if (string.IsNullOrEmpty(content))
return content;
var idx = content.IndexOfAny(InvalidCharacters);
if (idx >= 0)
{
var sb = new StringBuilder(content);
while (idx >= 0)
{
if (sb[idx] != '\\' || !doNotReplaceBackslashes)
sb[idx] = replace;
idx = content.IndexOfAny(InvalidCharacters, idx+1);
}
return sb.ToString();
}
return content;
}
public static class StringExtension
{
public static string RemoveInvalidChars(this string originalString)
{
string finalString=string.Empty;
if (!string.IsNullOrEmpty(originalString))
{
return string.Concat(originalString.Split(Path.GetInvalidFileNameChars()));
}
return finalString;
}
}
string illegal = "\"M<>\"\\a/ry/ h**ad:>> a\\/:*?\"<>| li*tt|le|| la\"mb.?";
string afterIllegalChars = illegal.RemoveInvalidChars();