Characters such as the hash (#) or question mark (?) These include uppercase and lowercase letters, decimal digits, hyphen, period, underscore, and tilde. The '..' characters are not allowed in the Path parameter for the MapPath method. Enable the parent paths on windows server. For example, any of "{}`^ " and all control characters. However some windows applications like Explorer, for example, may not behave correctly in this circumstance. Not encoding characters like : is doable only with OAS3, using the allowReserved keyword. To enable the parent paths on windows server, follow the steps given below :: 1. Not encoding curly braces ( { } ) will never be supported as those characters are not allowed in URLs. terie asked on 2003-03-06. For a Windows Form application the better solution for file and path names would be to use the SaveFileDialog control that does all path and file validation for you and will not allow the user to input invalid names or navigate to a directory they do not have permission for. Characters that are allowed in a URI but do not have a reserved purpose are called unreserved. Many have common uses in different systems so might result in an undesired outcome which may break the URL. So I would definitely pay attention to those characters, and to the other detailed notes about file/path names in the Microsoft article. This entry was posted in files , strings and tagged C# , C# programming , example , example program , file names , files , GetInvalidFileNameChars , GetInvalidPathChars , path names , paths , strings , Windows Forms programming . being limited to 255 characters. 1 Solution. Unsafe characters: If the question is to be understood about the HTTP/HTTPS URL (note that RFC2396 defines the URI), the semantic treatment of the RFC2396 syntax as resource locators for the HTTP[S] protocol is currently standardised by RFC7230, Sec. This doesn't apply to my ColdFusion version, but, since I do so much Xstandard work, I figure I would post up the reason this happens. For example the NTFS file system allow paths to have a length up to 32,767 characters with each component (folder, file, etc.) It displays the printable characters and shows the numeric values of the whitespace and control characters. Last Modified: 2012-06-21. The '..' characters are not allowed in the Path parameter for the MapPath method. The only forbidden characters in UNIX file names are the "/" character, which is used as a path separator ("\" in Windows) and the NUL character, which is used as a string terminator. There's no way to control it in Swagger 2.0. Web Hosting. the ‘..’ characters are not allowed in the path parameter for the mappath method . Enable the parent paths on windows server. The client is running off of the ASP version of the web services, not my ColdFusion implementation (again, not my client). which are part of the filename should be percent-encoded. Unsafe URL Characters: Which Characters Aren’t Allowed in URLs? Characters which are not allowed in URIs, but which are allowed in filenames, must also be percent-encoded. 2,259 Views. Forward slashes should be used to delimit paths. Though I agree, that article is not as easy to parse as it could be. You will be fine as just about any Windows path will also be valid in Linux. Unsafe characters are unsafe for different reasons. In the case of cleaning a file name of bad characters Regex works fine. ASP; 5 Comments. Any character not in the ‘Safe character’ list above is unsafe and cannot be used in a URL. 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