FileAccess Enum
Specifies constants that define the values for read, write, or read/write access to a file.
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Members
| Member name | Description |
|---|---|
Read |
The file can be read. |
Write |
The file can be written to. |
ReadWrite |
The file can be read from and written to. |
Remarks
The FileAccess enumeration is used to specify the access mode when opening a file. For example, you can open a file for reading only, writing only, or both reading and writing.
This enumeration is used by constructors of the FileStream class, and by the File.Open method.
Examples
The following code example demonstrates how to open a file for reading and writing using the FileAccess enumeration.
using System;
using System.IO;
public class Example
{
public static void Main()
{
string filePath = "myFile.txt";
try
{
// Create a file or open it if it exists for reading and writing.
using (FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
// Write some data to the file
byte[] dataToWrite = System.Text.Encoding.UTF8.GetBytes("Hello, .NET Framework!");
fs.Write(dataToWrite, 0, dataToWrite.Length);
fs.Flush(); // Ensure data is written to disk
// Move the stream position to the beginning to read
fs.Seek(0, SeekOrigin.Begin);
// Read data from the file
byte[] dataToRead = new byte[fs.Length];
fs.Read(dataToRead, 0, dataToRead.Length);
string content = System.Text.Encoding.UTF8.GetString(dataToRead);
Console.WriteLine($"File content: {content}");
}
}
catch (Exception ex)
{
Console.WriteLine($"An error occurred: {ex.Message}");
}
}
}