使用File、Path和Directory进行常见的操作

我们偶尔会用到文件操作，其中File、Path和Directory这三个类是比较常见的，今天写了一个测试demo，也是顺便学习一下，记录一二。

BTW，使用这几个类的时候需要引用using System.IO命名空间。

      class Program
      {
          static void Main(string[] args)
          {
              //ProcessPath();
              //ProcessFile();
              //ReadFileByByteArray();
              //ReadFileByAllLines();
              //ReadFileByAllText();
             //WriteFileByByteArray();
             //WriteFileByLines();
             //WriteFileByText();
             UseDirectory();
             Console.ReadKey();
         }
         /// <summary>
         /// path类只是在string层面进行操作
         /// </summary>
         private static void ProcessPath()
         {
             string path = @"C:\Users\Administrator\Desktop\XX-Net.txt";
             string directory = Path.GetDirectoryName(path);
             string fileName = Path.GetFileName(path);
             string fileNamenoExtension = Path.GetFileNameWithoutExtension(path);
             string fileExtension = Path.GetExtension(path);
             string ss = Path.ChangeExtension(path, "csv");
             Console.WriteLine($"directory is {directory},fileName is {fileName},file without extension is{fileNamenoExtension},extension is {fileExtension},new file is{ss} ");
         }
         private static void ProcessFile()
         {
             string path = @"C:\Users\Administrator\Desktop\2.txt";
             //File.Create(path);
             //File.Delete(path);
             //File.Copy(path, @"C:\Users\Administrator\Desktop\3.txt");
             File.Move(path, @"C:\Users\Administrator\Desktop\4.txt");
             Console.WriteLine("creat successfully...");
         }
         private static void ReadFileByByteArray()
         {
             string path = @"C:\Users\Administrator\Desktop\3.txt";
             byte[] fileByte = File.ReadAllBytes(path);
             string fileByByte = Encoding.Default.GetString(fileByte);
             Console.WriteLine(fileByByte);
         }
         private static void ReadFileByAllLines()
         {
             string path = @"C:\Users\Administrator\Desktop\3.txt";
             string[] fileLines = File.ReadAllLines(path,Encoding.Default);
             foreach (var line in fileLines)
             {
                 Console.WriteLine(line);
             }
         }
         private static void ReadFileByAllText()
         {
             string path = @"C:\Users\Administrator\Desktop\3.txt";
             string fileText = File.ReadAllText(path,Encoding.Default);
             Console.WriteLine(fileText);
         }
         private static void WriteFileByByteArray()
         {
             string path = @"C:\Users\Administrator\Desktop\1.txt";
             string fileStr = "大家好，我来了，我的号码是1388888888";
             byte[] fileByte = Encoding.Default.GetBytes(fileStr);
             File.WriteAllBytes(path, fileByte);
             Console.WriteLine("Write Sucessfully...");
         }
         private static void WriteFileByLines()
         {
             string path = @"C:\Users\Administrator\Desktop\1.txt";
             string[] fileArray = { "你好","我的名字","叫Tom","我来自安徽省阜阳市太和县","他们","都知道我是个好人" };
             File.WriteAllLines(path, fileArray);
             Console.WriteLine("Write Sucessfully...");
         }
         private static void WriteFileByText()
         {
             string path = @"C:\Users\Administrator\Desktop\1.txt";
             //File.WriteAllText(path, "落霞与孤鹜齐飞，秋水共长天一色。");
             File.AppendAllText(path, "宜将剩勇追穷寇，不可沽名学霸王！");
             Console.WriteLine("Write Sucessfully...");
         }
         private static void UseDirectory()
         {
             //Directory.CreateDirectory(@"C:\Users\Administrator\Desktop\NewFolder");
             //Directory.Delete(@"C:\Users\Administrator\Desktop\NewFolder",true);

             string[] files = Directory.GetFiles(@"D:\迅雷下载", "*.rmvb",SearchOption.TopDirectoryOnly);
             foreach (var file in files)
             {
                 Console.WriteLine(file);
             }
             Console.WriteLine("Get File Successfully...");

         }
     }