FileInfo path with '|' gives illegal characters in path exception?

-2

When I try to construct a FileInfo object using a string that contains a '|' character, I'm getting an Illegal characters in path exception. The string is just parsed from some data source I don't have control over, so I can't add any escape characters to the original string. So I tried a .Replace("|","|") on the string but still get the same exception. What's the proper way to escape this so I don't get the exception?

Also, is there a way to get the offending character in the exception so my exception handling can correct it automatically and I don't need to wait for the next magic character that isn't allowed to start crashing everything before I can handle the error?

edited Nov 16 '18 at 0:55

John

13.3k32544

asked Nov 16 '18 at 0:33

Thundercleez

7029

2

You should provide a code sample that demonstrates the problem you're having. But the issue here is that the pipe character (|) is invalid for directory and file names, so you'd have to strip it out completely. The string you're getting from the data source is not a valid path.

– Rufus L
Nov 16 '18 at 0:36

Check against GetInvalidPathChars: docs.microsoft.com/en-us/dotnet/api/…

– Camilo Terevinto
Nov 16 '18 at 0:41

See Windows' reserved characters (which you can get via the C# method Camilo mentioned)

– John
Nov 16 '18 at 0:54

1

filePath = Path.GetInvalidPathChars().Aggregate(filePath, (fPath, chr) => fPath.Replace(chr.ToString(), ""));...will remove all the invalid path characters from a string named filePath. Note that there are additional characters that are invalid for a file name that are valid for a path, like : * ? / .

– Rufus L
Nov 16 '18 at 1:07

1

Path.GetInvalidPathChars().ToList().ForEach(c => filePath = filePath.Replace(c.ToString(), "")); is another linq-y way to do it.

– Rufus L
Nov 16 '18 at 1:12

add a comment |

-2

edited Nov 16 '18 at 0:55

John

13.3k32544

asked Nov 16 '18 at 0:33

Thundercleez

7029

2

You should provide a code sample that demonstrates the problem you're having. But the issue here is that the pipe character (|) is invalid for directory and file names, so you'd have to strip it out completely. The string you're getting from the data source is not a valid path.

– Rufus L
Nov 16 '18 at 0:36

Check against GetInvalidPathChars: docs.microsoft.com/en-us/dotnet/api/…

– Camilo Terevinto
Nov 16 '18 at 0:41

See Windows' reserved characters (which you can get via the C# method Camilo mentioned)

– John
Nov 16 '18 at 0:54

1

filePath = Path.GetInvalidPathChars().Aggregate(filePath, (fPath, chr) => fPath.Replace(chr.ToString(), ""));...will remove all the invalid path characters from a string named filePath. Note that there are additional characters that are invalid for a file name that are valid for a path, like : * ? / .

– Rufus L
Nov 16 '18 at 1:07

1

Path.GetInvalidPathChars().ToList().ForEach(c => filePath = filePath.Replace(c.ToString(), "")); is another linq-y way to do it.

– Rufus L
Nov 16 '18 at 1:12

add a comment |

-2

edited Nov 16 '18 at 0:55

John

13.3k32544

asked Nov 16 '18 at 0:33

Thundercleez

7029

c# exception file-io

edited Nov 16 '18 at 0:55

John

13.3k32544

asked Nov 16 '18 at 0:33

Thundercleez

7029

edited Nov 16 '18 at 0:55

John

13.3k32544

asked Nov 16 '18 at 0:33

Thundercleez

7029

edited Nov 16 '18 at 0:55

John

13.3k32544

edited Nov 16 '18 at 0:55

John

13.3k32544

edited Nov 16 '18 at 0:55

John

13.3k32544

asked Nov 16 '18 at 0:33

Thundercleez

7029

asked Nov 16 '18 at 0:33

Thundercleez

7029

asked Nov 16 '18 at 0:33

Thundercleez

7029

2

You should provide a code sample that demonstrates the problem you're having. But the issue here is that the pipe character (|) is invalid for directory and file names, so you'd have to strip it out completely. The string you're getting from the data source is not a valid path.

– Rufus L
Nov 16 '18 at 0:36

Check against GetInvalidPathChars: docs.microsoft.com/en-us/dotnet/api/…

– Camilo Terevinto
Nov 16 '18 at 0:41

See Windows' reserved characters (which you can get via the C# method Camilo mentioned)

– John
Nov 16 '18 at 0:54

1

filePath = Path.GetInvalidPathChars().Aggregate(filePath, (fPath, chr) => fPath.Replace(chr.ToString(), ""));...will remove all the invalid path characters from a string named filePath. Note that there are additional characters that are invalid for a file name that are valid for a path, like : * ? / .

– Rufus L
Nov 16 '18 at 1:07

1

Path.GetInvalidPathChars().ToList().ForEach(c => filePath = filePath.Replace(c.ToString(), "")); is another linq-y way to do it.

– Rufus L
Nov 16 '18 at 1:12

add a comment |

2

You should provide a code sample that demonstrates the problem you're having. But the issue here is that the pipe character (|) is invalid for directory and file names, so you'd have to strip it out completely. The string you're getting from the data source is not a valid path.

– Rufus L
Nov 16 '18 at 0:36

Check against GetInvalidPathChars: docs.microsoft.com/en-us/dotnet/api/…

– Camilo Terevinto
Nov 16 '18 at 0:41

See Windows' reserved characters (which you can get via the C# method Camilo mentioned)

– John
Nov 16 '18 at 0:54

1

filePath = Path.GetInvalidPathChars().Aggregate(filePath, (fPath, chr) => fPath.Replace(chr.ToString(), ""));...will remove all the invalid path characters from a string named filePath. Note that there are additional characters that are invalid for a file name that are valid for a path, like : * ? / .

– Rufus L
Nov 16 '18 at 1:07

1

Path.GetInvalidPathChars().ToList().ForEach(c => filePath = filePath.Replace(c.ToString(), "")); is another linq-y way to do it.

– Rufus L
Nov 16 '18 at 1:12

You should provide a code sample that demonstrates the problem you're having. But the issue here is that the pipe character (|) is invalid for directory and file names, so you'd have to strip it out completely. The string you're getting from the data source is not a valid path.

– Rufus L
Nov 16 '18 at 0:36

Check against GetInvalidPathChars: docs.microsoft.com/en-us/dotnet/api/…

– Camilo Terevinto
Nov 16 '18 at 0:41

See Windows' reserved characters (which you can get via the C# method Camilo mentioned)

– John
Nov 16 '18 at 0:54

filePath = Path.GetInvalidPathChars().Aggregate(filePath, (fPath, chr) => fPath.Replace(chr.ToString(), ""));...will remove all the invalid path characters from a string named filePath. Note that there are additional characters that are invalid for a file name that are valid for a path, like : * ? / .

– Rufus L
Nov 16 '18 at 1:07

Path.GetInvalidPathChars().ToList().ForEach(c => filePath = filePath.Replace(c.ToString(), "")); is another linq-y way to do it.

– Rufus L
Nov 16 '18 at 1:12

add a comment |

2 Answers
2

active

oldest

votes

It doesn't sound like your data source is providing valid file paths/names for the operating system you're using.

You can use Path.GetInvalidFileNameChars() and Path.GetInvalidPathChars() to get arrays of characters that aren't allowed in a filename or path. These would need to be removed not escaped to be legal for a file system. Stripping these out is likely a work around, rather than a fix. It would be best to resolve the issue at the source of your data.

answered Nov 16 '18 at 0:44

dariom

3,9902440

add a comment |

Here is a sample method that will remove invalid path characters from the path portion of the string, and invalid file characters from the file name portion of the input string:

public static string RemoveIllegalChars(string path)

{

    if (string.IsNullOrWhiteSpace(path)) return path;



    // Remove invalid directory characters

    Path.GetInvalidPathChars().ToList()

        .ForEach(c => path = path.Replace(c.ToString(), ""));



    // Remove invalid file name characters from file name portion and return the result

    return Path.Combine(Path.GetDirectoryName(path),

        Path.GetInvalidFileNameChars()

            .Aggregate(Path.GetFileName(path), (fileName, invalidChar) =>

                fileName.Replace(invalidChar.ToString(), "")));

}

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

It doesn't sound like your data source is providing valid file paths/names for the operating system you're using.

answered Nov 16 '18 at 0:44

dariom

3,9902440

add a comment |

It doesn't sound like your data source is providing valid file paths/names for the operating system you're using.

answered Nov 16 '18 at 0:44

dariom

3,9902440

add a comment |

It doesn't sound like your data source is providing valid file paths/names for the operating system you're using.

answered Nov 16 '18 at 0:44

dariom

3,9902440

It doesn't sound like your data source is providing valid file paths/names for the operating system you're using.

answered Nov 16 '18 at 0:44

dariom

3,9902440

answered Nov 16 '18 at 0:44

dariom

3,9902440

answered Nov 16 '18 at 0:44

dariom

3,9902440

answered Nov 16 '18 at 0:44

dariom

3,9902440

add a comment |

Here is a sample method that will remove invalid path characters from the path portion of the string, and invalid file characters from the file name portion of the input string:

public static string RemoveIllegalChars(string path)

{

    if (string.IsNullOrWhiteSpace(path)) return path;



    // Remove invalid directory characters

    Path.GetInvalidPathChars().ToList()

        .ForEach(c => path = path.Replace(c.ToString(), ""));



    // Remove invalid file name characters from file name portion and return the result

    return Path.Combine(Path.GetDirectoryName(path),

        Path.GetInvalidFileNameChars()

            .Aggregate(Path.GetFileName(path), (fileName, invalidChar) =>

                fileName.Replace(invalidChar.ToString(), "")));

}

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

add a comment |

Here is a sample method that will remove invalid path characters from the path portion of the string, and invalid file characters from the file name portion of the input string:

public static string RemoveIllegalChars(string path)

{

    if (string.IsNullOrWhiteSpace(path)) return path;



    // Remove invalid directory characters

    Path.GetInvalidPathChars().ToList()

        .ForEach(c => path = path.Replace(c.ToString(), ""));



    // Remove invalid file name characters from file name portion and return the result

    return Path.Combine(Path.GetDirectoryName(path),

        Path.GetInvalidFileNameChars()

            .Aggregate(Path.GetFileName(path), (fileName, invalidChar) =>

                fileName.Replace(invalidChar.ToString(), "")));

}

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

add a comment |

Here is a sample method that will remove invalid path characters from the path portion of the string, and invalid file characters from the file name portion of the input string:

public static string RemoveIllegalChars(string path)

{

    if (string.IsNullOrWhiteSpace(path)) return path;



    // Remove invalid directory characters

    Path.GetInvalidPathChars().ToList()

        .ForEach(c => path = path.Replace(c.ToString(), ""));



    // Remove invalid file name characters from file name portion and return the result

    return Path.Combine(Path.GetDirectoryName(path),

        Path.GetInvalidFileNameChars()

            .Aggregate(Path.GetFileName(path), (fileName, invalidChar) =>

                fileName.Replace(invalidChar.ToString(), "")));

}

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

Here is a sample method that will remove invalid path characters from the path portion of the string, and invalid file characters from the file name portion of the input string:

public static string RemoveIllegalChars(string path)

{

    if (string.IsNullOrWhiteSpace(path)) return path;



    // Remove invalid directory characters

    Path.GetInvalidPathChars().ToList()

        .ForEach(c => path = path.Replace(c.ToString(), ""));



    // Remove invalid file name characters from file name portion and return the result

    return Path.Combine(Path.GetDirectoryName(path),

        Path.GetInvalidFileNameChars()

            .Aggregate(Path.GetFileName(path), (fileName, invalidChar) =>

                fileName.Replace(invalidChar.ToString(), "")));

}

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

answered Nov 16 '18 at 1:35

Rufus L

19.2k31732

add a comment |

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