C disk drives, folders and file operations

c# Operation of files and folders

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //Driveinfo driveInfo = new Driveinfo("C");  // Copied it from the Internet , There is a mistake 
            DriveInfo driveInfo = new DriveInfo("C");
            MessageBox.Show(driveInfo.ToString());
            MessageBox.Show(" Name of the drive ：" + driveInfo.Name);
            MessageBox.Show(" The root directory of the drive ：" + driveInfo.RootDirectory);
            MessageBox.Show(" Whether the drive is ready ：" + driveInfo.IsReady);
            MessageBox.Show(" Amount of free space available on disk ：" + driveInfo.AvailableFreeSpace);
            MessageBox.Show(" Total free space available on drive :" + driveInfo.TotalFreeSpace);
            MessageBox.Show(" Total storage space on drive ：" + driveInfo.TotalSize);
            MessageBox.Show(" File system format name :" + driveInfo.DriveFormat);
            MessageBox.Show(" Drive type ：" + driveInfo.DriveType);
            MessageBox.Show(" The volume label of the drive ：" + driveInfo.VolumeLabel);

        }
 // Get all drive names and file formats in your computer 
        private void button2_Click(object sender, EventArgs e)
        {
           
            DriveInfo[] drives = DriveInfo.GetDrives();
            foreach (DriveInfo drive in drives)
            {
                if (drive.IsReady)
                {
                    MessageBox.Show(" Drive name ：" + drive.Name);
                    MessageBox.Show(" File format ：" + drive.DriveFormat);
                }
            }

        }
         // Use  Directory  Class in  D  On disk operation  code  Folder , It is required to judge whether the folder exists first ,
        private void button3_Click(object sender, EventArgs e)
        {
   
            // Delete... If it exists , Otherwise, create the folder 
            if (Directory.Exists(@"D:\code"))
                Directory.Delete(@"D:\code", true);
            else
                Directory.CreateDirectory(@"D:\code");
            MessageBox.Show("ok");

        }

        private void button4_Click(object sender, EventArgs e)
        {
            // stay  D  Discoid  code  Create a folder named  test1.txt  The file of , And get the relevant attributes of the file , Then move it to D On the plate  code-1  In the folder .
            Directory.CreateDirectory(@"D:\code");
            FileInfo fileInfo = new FileInfo(@"D:\code\test1.txt");
            if (!fileInfo.Exists)
                fileInfo.Create().Close();// create a file .Close() Close the stream and release all resources associated with it 

            fileInfo.Attributes = FileAttributes.Normal;
            MessageBox.Show(" file name :" + fileInfo.Name);
            MessageBox.Show(" File parent directory ：" + fileInfo.Directory);
            MessageBox.Show(" Full directory of files :" + fileInfo.FullName);
            MessageBox.Show(" Full path to directory :" + fileInfo.DirectoryName);
            MessageBox.Show(" File creation time :" + fileInfo.CreationTime);
            MessageBox.Show(" File extension :" + fileInfo.Extension);
            MessageBox.Show(" Whether the file is read-only :" + fileInfo.IsReadOnly);
            MessageBox.Show(" Last accessed file time :" + fileInfo.LastAccessTime);
            MessageBox.Show(" Last write file time :" + fileInfo.LastWriteTime);
            MessageBox.Show(" file size ：" + fileInfo.Length);
           

            Directory.CreateDirectory(@"D:\code-1");// establish  code-1  Folder 
            FileInfo newFileInfo = new FileInfo(@"D:\code-1\test1.txt");// Judge  code-1 Whether there is... Under the folder test1.txt
            if (!newFileInfo.Exists)
                fileInfo.MoveTo(@"D:\code-1\test1.txt");// If it doesn't exist, move the file 

        }

        private void button5_Click(object sender, EventArgs e)
        {
            // Path path = new Path();
            //string path = @"d:\code";
        }

        private void button6_Click(object sender, EventArgs e)
        {
            //  Directory.CreateDirectory(@"D:\code");// Create directory 
            // File.Create(@"D:\code\test.txt").Close(); // Create files in the directory 

 //==================================== Read  D  disc  code  Under the folder  test.txt  Information in the file . ============
                   
            string path = @"D:\code\test.txt";
            StreamReader reader = new StreamReader(path);
            if (reader.Peek() != -1)// Determine whether there are characters in the file 
            {
               // string str = reader.ReadLine();// Read only one line 
                string str = reader.ReadToEnd();// Read it all 
                MessageBox.Show(str);
                Console.ReadLine();
            }
            reader.Close();

        }

        private void button7_Click(object sender, EventArgs e)
        {
            // towards  D  disc  code  The folder  test.txt  Write your name and mobile number in the file 
            string path = @"D:\code\test.txt";
            using (StreamWriter writer = new StreamWriter(path))
            {
                writer.WriteLine(" full name ");
                writer.WriteLine(" Phone number ");
                writer.Flush();// Refresh cache 
            }
        }

        private void button8_Click(object sender, EventArgs e)
        {
            // stay  D  disc  code  The folder  student.txt  Write the student number information in the file 
            File.Create(@"D:\code\student.txt").Close();
            string path = @"D:\code\student.txt";
            string mes = " Student number ：3188906224";
            byte[] bytes = Encoding.UTF8.GetBytes(mes);// Convert data from string type to byte type 
            using (FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Write))
            {
                fileStream.Write(bytes, 0, bytes.Length);
                fileStream.Flush();
            }

            // from  D  Discoid  code  In the folder  student.txt  The student number in the file is read out , And display it on the console 
            if (File.Exists(path))
            {
                using (FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read))
                {
                    byte[] b = new byte[fileStream.Length];// Define the byte array for storing file information 
                    fileStream.Read(b, 0, b.Length);// Read file information 
                    char[] c = Encoding.UTF8.GetChars(b);// Convert the read data from byte type to character type 
                    Console.WriteLine(c);

                }
            }
            else
                Console.WriteLine(" file does not exist ");
            Console.ReadLine();

        }
    }
}

Here it is , Thank you, blogger ： Pistachio 2021, Part of this article is transferred from the following link
https://blog.csdn.net/weixin_56814032/article/details/120242871