File path c#

On some systems, file paths can contain extensions, which indicate the type of information stored in the file. The format of a file name extension is platform-dependent; for example, some systems limit extensions to three characters such as FAT16 commonly used on smaller flash storage and older versions of ISO used on optical media , and others do not. The current platform also determines the set of characters used to separate the elements of a path, and the set of characters that cannot be used when specifying paths.

Because of these differences, the fields of the Path class as well as the exact behavior of some members of the Path class are platform-dependent. A path can contain absolute or relative location information. Absolute paths fully specify a location: the file or directory can be uniquely identified regardless of the current location. Relative paths specify a partial location: the current location is used as the starting point when locating a file specified with a relative path.

To determine the current directory, call Directory. NET Core 1. NET Framework 4. For more information on file path formats on Windows, see File path formats on Windows systems. Most members of the Path class do not interact with the file system and do not verify the existence of the file specified by a path string.

Path class members that modify a path string, such as ChangeExtension , have no effect on names of files in the file system. Some Path members do validate the contents of a specified path string, and throw an ArgumentException if the string contains characters that are not valid in path strings, as defined in the characters returned from the GetInvalidPathChars method. This validation behavior varies between.

NET versions:. NET Framework and. NET Core versions older than 2. NET Core 2. The members of the Path class enable you to quickly and easily perform common operations such as determining whether a file name extension is part of a path, and combining two strings into one path name.

All members of the Path class are static and can therefore be called without having an instance of a path. In members that accept a path as an input string, that path must be well-formed or an exception is raised.

For example, if a path is fully qualified but begins with a space, the path is not trimmed in methods of the class. Therefore, the path is malformed and an exception is raised. Similarly, a path or a combination of paths cannot be fully qualified twice.

Ensure that your paths are well-formed when using methods that accept a path string. In members that accept a path, the path can refer to a file or just a directory. The specified path can also refer to a relative path or a Universal Naming Convention UNC path for a server and share name. For example, all the following are acceptable paths:.

Because all these operations are performed on strings, it is impossible to verify that the results are valid in all scenarios. For example, the GetExtension method parses a string that you pass to it and returns the extension from that string. However, this does not mean that a file with that extension exists on the disk. Provides a platform-specific alternate character used to separate directory levels in a path string that reflects a hierarchical file system organization.

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Name ; rootNode. GetDirectories , rootNode ; treeView1. Improve this question. Xel Xel 2 2 gold badges 8 8 silver badges 22 22 bronze badges. Add a comment. Replace the if - else statement with the using statement in the following code. For more FileMode values that you can try, see FileMode. The folder name is malformed.

For example, it contains illegal characters or is only white space ArgumentException class. Use the Path class to create valid path names. The parent folder of the folder to be created is read-only IOException class. The folder name is null ArgumentNullException class. The folder name is too long PathTooLongException class. The folder name is only a colon, ":" PathTooLongException class. An instance of the SecurityException class may be thrown in partial-trust situations.