MSDN Documentation

Inheritance

System.Object
System.MarshalByRefObject
System.IO.FileSystemInfo
System.IO.FileInfo

Constructors

• FileInfo(string fileName)

  public FileInfo(string fileName)

  Initializes a new instance of the FileInfo class.

  Parameters

  fileName

  A relative or absolute path that resolves to a file.

Properties

• Exists

  public bool Exists { get; }

  Gets a value indicating whether the file referenced by this FileInfo instance exists.

• Name

  public string Name { get; }

  Gets the name of the file or directory.

• FullName

  public string FullName { get; }

  Gets the fully qualified path of the file or directory.

• Directory

  public DirectoryInfo Directory { get; }

  Gets an object representing the directory containing this file.

• Length

  public long Length { get; }

  Gets the size, in bytes, of the current file.

• CreationTime

  public DateTime CreationTime { get; }

  Gets or sets the date and time, in the current Coordinated Universal Time (UTC) information, that the current file was created.

• LastAccessTime

  public DateTime LastAccessTime { get; }

  Gets or sets the date and time that the current file was last accessed.

• LastWriteTime

  public DateTime LastWriteTime { get; }

  Gets or sets the date and time that the current file was last written to.

Methods

• Create()

  public FileStream Create()

  Creates or overwrites a file in the specified path.

  Returns: A new FileStream object writing to the specified path.

• Delete()

  public void Delete()

  Deletes this file.

• MoveTo(string destFileName)

  public void MoveTo(string destFileName)

  Moves a specified file to a new location and optionally allows the existing file to be overwritten.

  Parameters

  destFileName

  The new path and name of the file. This must be a file name, not a directory name.

• Open(FileMode mode)

  public FileStream Open(FileMode mode)

  Opens a file in the specified mode.

  Parameters

  mode

  A System.IO.FileMode enumeration value that specifies whether to open or create the file.

  Returns: A FileStream object on the specified path that matches the specified mode.

• OpenRead()

  public FileStream OpenRead()

  Opens an existing file for reading.

  Returns: A FileStream object that can be used to read from the file.

• OpenWrite()

  public FileStream OpenWrite()

  Opens an existing file for writing.

  Returns: A FileStream object that can be used to write to the file.

Example Usage

The following example demonstrates how to create a FileInfo object and get information about the file.

using System;
using System.IO;

public class Example
{
    public static void Main()
    {
        string filePath = "myFile.txt";

        // Create a dummy file for the example
        File.WriteAllText(filePath, "This is a test file.");

        FileInfo fileInfo = new FileInfo(filePath);

        if (fileInfo.Exists)
        {
            Console.WriteLine($"File Name: {fileInfo.Name}");
            Console.WriteLine($"Full Path: {fileInfo.FullName}");
            Console.WriteLine($"File Size: {fileInfo.Length} bytes");
            Console.WriteLine($"Creation Time: {fileInfo.CreationTime}");
            Console.WriteLine($"Last Access Time: {fileInfo.LastAccessTime}");
            Console.WriteLine($"Last Write Time: {fileInfo.LastWriteTime}");

            // Example of opening and reading
            using (FileStream fs = fileInfo.OpenRead())
            using (StreamReader reader = new StreamReader(fs))
            {
                Console.WriteLine("\nFile Content:");
                Console.WriteLine(reader.ReadToEnd());
            }

            // Example of deleting the file
            // fileInfo.Delete();
            // Console.WriteLine("\nFile deleted.");
        }
        else
        {
            Console.WriteLine($"File '{filePath}' does not exist.");
        }
    }
}