Note To view the.NET Framework source code for this type, see the. You can browse through the source code online, download the reference for offline viewing, and step through the sources (including patches and updates) during debugging; see. Use the File class for typical operations such as copying, moving, renaming, creating, opening, deleting, and appending to a single file at a time. You can also use the File class to get and set file attributes or information related to the creation, access, and writing of a file. If you want to perform operations on multiple files, see.
Many of the File methods return other I/O types when you create or open files. You can use these other types to further manipulate a file. For more information, see specific File members such as,.
Because all File methods are static, it might be more efficient to use a File method rather than a corresponding instance method if you want to perform only one action. All File methods require the path to the file that you are manipulating. The static methods of the File class perform security checks on all methods. If you are going to reuse an object several times, consider using the corresponding instance method of instead, because the security check will not always be necessary.
By default, full read/write access to new files is granted to all users. The following table describes the enumerations that are used to customize the behavior of various File methods. Enumeration Description Specifies read and write access to a file. Specifies the level of access permitted for a file that is already in use.
Specifies whether the contents of an existing file are preserved or overwritten, and whether requests to create an existing file cause an exception. Note 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. For example, 'c: temp c: windows' also raises an exception in most cases. 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:. 'c: MyDir MyFile.txt' in C#, or 'c: MyDir MyFile.txt' in Visual Basic. 'c: MyDir' in C#, or 'c: MyDir' in Visual Basic. 'MyDir MySubdir' in C#, or 'MyDir MySubDir' in Visual Basic. ' MyServer MyShare' in C#, or ' MyServer MyShare' in Visual Basic.
For a list of common I/O tasks, see.
'to place (papers) in consecutive order for future reference,' mid-15c., from Middle French filer 'string documents on a wire for preservation or reference,' from fil 'thread, string' (12c.), from Latin filum 'a thread, string,' from PIE.gwhis-lom (cf. Armenian jil 'sinew, string, line,' Lithuanian gysla 'vein, sinew,' Old Church Slavonic zila 'vein'), from root.gwhi- 'thread, tendon.'
The notion is of documents hung up on a line. File (filacium) is a threed or wyer, whereon writs, or other exhibits in courts, are fastened for the better keeping of them. Cowel, 'The Interpreter,' 1607 Methods have become more sophisticated, but the word has stuck.
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Related: Filed; filing.
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Note To view the.NET Framework source code for this type, see the. You can browse through the source code online, download the reference for offline viewing, and step through the sources (including patches and updates) during debugging; see. Use the File class for typical operations such as copying, moving, renaming, creating, opening, deleting, and appending to a single file at a time. You can also use the File class to get and set file attributes or information related to the creation, access, and writing of a file. If you want to perform operations on multiple files, see. Many of the File methods return other I/O types when you create or open files.
You can use these other types to further manipulate a file. For more information, see specific File members such as,. Because all File methods are static, it might be more efficient to use a File method rather than a corresponding instance method if you want to perform only one action. All File methods require the path to the file that you are manipulating. The static methods of the File class perform security checks on all methods. If you are going to reuse an object several times, consider using the corresponding instance method of instead, because the security check will not always be necessary. By default, full read/write access to new files is granted to all users.
Folder Protector Software
The following table describes the enumerations that are used to customize the behavior of various File methods. Enumeration Description Specifies read and write access to a file. Specifies the level of access permitted for a file that is already in use. Specifies whether the contents of an existing file are preserved or overwritten, and whether requests to create an existing file cause an exception. Note 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.
Where Are My Documents Stored
Similarly, a path or a combination of paths cannot be fully qualified twice. For example, 'c: temp c: windows' also raises an exception in most cases. 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:.
'c: MyDir MyFile.txt' in C#, or 'c: MyDir MyFile.txt' in Visual Basic. 'c: MyDir' in C#, or 'c: MyDir' in Visual Basic. 'MyDir MySubdir' in C#, or 'MyDir MySubDir' in Visual Basic. ' MyServer MyShare' in C#, or ' MyServer MyShare' in Visual Basic. For a list of common I/O tasks, see.