In C#, ‘File’ class provides many static methods for moving, copying, and deleting files. These Static methods involve moving a file and copying and deleting a file also. Let’s check out the chart below.
List of the common File class methods:
| Sr. No. | Method Name | Description |
|---|---|---|
| 1. | Copy | This method is used to copy given file to the specified location. |
| 2. | Create | This method is used to create a file in the specified path. |
| 3. | Delete | This method is used to Delete a file. |
| 4. | Open | This method is used to return a filestream object at the specified path. |
| 5. | Move | Moves a given file to a new location. We can also specify a different or new name for the file in the new location. |
| 6. | Exists | This method is used to check whether the specified file exists or not. It returns boolean=true if file exists else will return false. |
| 7. | OpenWrite | It is used to opens an existing file or creates a new file for writing. |
| 8. | OpenRead | It is used to opens an existing file for reading. |
File.Create Method:
The File.Create method is used to creates a file in the specified folder.
string filePath= @ "D:\Data\Student.txt";
FileStream fs = File.Create(filePath);
Byte[] info = new UTF8Encoding(true).GetBytes("This is some text in the file.");
fs.Write(info, 0, info.Length);
Console.WriteLine("File has been created");
File.Delete Method
The File.Delete method is used to deletes a file with the given name in a specified folder.
static void Main(string[] args) {
string path = @ "D:\Data\Student.txt";
File.Delete(path);
Console.WriteLine("File has been deleted successfully.");
}File.Open Method
This method is used to return a FileStream object at the specified path.Â
FileStream fs = File.Open(fileName, FileMode.Open, FileAccess.Write, FileShare.None); The following example demonstrates some of the FileStream constructors.
using System;
using System.IO;
using System. Text;
class TestClass
{
public static void Main()
{
string path = @"c:\DATA\Student.txt";
// Delete the file if it exists.
if (File.Exists(path))
{
File.Delete(path);
}
//Create the file.
using (FileStream fs = File.Create(path))
{
AddText(fs, "This is some text");
AddText(fs, "This is some more text,");
AddText(fs, "\r\nand this is on a new line");
AddText(fs, "\r\n\r\nThe following is a subset of characters:\r\n");
for (int i=1;i < 120;i++)
{
AddText(fs, Convert.ToChar(i).ToString());
}
}
//Open the stream and read it back.
using (FileStream fs = File.OpenRead(path))
{
byte[] b = new byte[1024];
UTF8Encoding temp = new UTF8Encoding(true);
while (fs.Read(b,0,b.Length) > 0)
{
Console.WriteLine(temp.GetString(b));
}
}
}
private static void AddText(FileStream fs, string value)
{
byte[] info = new UTF8Encoding(true).GetBytes(value);
fs.Write(info, 0, info.Length);
}
} File.Exists Method:
This method determines whether the specified file exists.
static void Main(string[] args) {
string path = @ "D:\Data\Student.txt";
Console.WriteLine(File.Exists(path) ? "File exists." : "oops! File does not exist.");
}File.Copy Method:
This method copies a file to the specified location.
static void Main(string[] args)
{
string path = @ "D:\data\student.txt";
string path1 = @ "D:\DataNew\Sudent.txt";
File.Copy(path, path1);
Console.WriteLine("File has been copied, Well done.");
}File.Move Method:
This method moves a specified file to a new location. We can specify a different name for the file in the new location:
static void Main(string[] args)
{
string path = @ "D:\MyTestFile1.txt";
string path1 = @ "c:\MyTest1.txt";
File.Move(path, path1);
Console.WriteLine("File has been moved");
}File.OpenRead method:
This method is used to opens an existing file for reading its data. Check more on multiple read methods of File class.
public static void Main() {
string path = @ "d:\data\student.txt";
if (!File.Exists(path)) {
// Create the file.
FileStream fs = File.Create(path); {
Byte[] info = new UTF8Encoding(true).GetBytes("This is a file");
fs.Write(info, 0, info.Length);
}
}
using(FileStream fs = File.OpenRead(path)) {
byte[] b = new byte[1024];
UTF8Encoding temp = new UTF8Encoding(true);
while (fs.Read(b, 0, b.Length) > 0) {
Console.WriteLine(temp.GetString(b));
}
}We hope in above post you have learned about the different methods of File class in C#. Please leave your comments and suggestions it will help us to improve our posts/content quality.