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。

 1     class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             //ProcessPath();
 6             //ProcessFile();
 7             //ReadFileByByteArray();
 8             //ReadFileByAllLines();
 9             //ReadFileByAllText();
10             //WriteFileByByteArray();
11             //WriteFileByLines();
12             //WriteFileByText();
13             UseDirectory();
14             Console.ReadKey();
15         }
16         /// <summary>
17         /// path类只是在string层面进行操作
18         /// </summary>
19         private static void ProcessPath()
20         {
21             string path = @"C:UsersAdministratorDesktopXX-Net.txt";
22             string directory = Path.GetDirectoryName(path);
23             string fileName = Path.GetFileName(path);
24             string fileNamenoExtension = Path.GetFileNameWithoutExtension(path);
25             string fileExtension = Path.GetExtension(path);
26             string ss = Path.ChangeExtension(path, "csv");
27             Console.WriteLine($"directory is {directory},fileName is {fileName},file without extension is{fileNamenoExtension},extension is {fileExtension},new file is{ss} ");
28         }
29         private static void ProcessFile()
30         {
31             string path = @"C:UsersAdministratorDesktop2.txt";
32             //File.Create(path);
33             //File.Delete(path);
34             //File.Copy(path, @"C:UsersAdministratorDesktop3.txt");
35             File.Move(path, @"C:UsersAdministratorDesktop4.txt");
36             Console.WriteLine("creat successfully...");
37         }
38         private static void ReadFileByByteArray()
39         {
40             string path = @"C:UsersAdministratorDesktop3.txt";
41             byte[] fileByte = File.ReadAllBytes(path);
42             string fileByByte = Encoding.Default.GetString(fileByte);
43             Console.WriteLine(fileByByte);
44         }
45         private static void ReadFileByAllLines()
46         {
47             string path = @"C:UsersAdministratorDesktop3.txt";
48             string[] fileLines = File.ReadAllLines(path,Encoding.Default);
49             foreach (var line in fileLines)
50             {
51                 Console.WriteLine(line);
52             }
53         }
54         private static void ReadFileByAllText()
55         {
56             string path = @"C:UsersAdministratorDesktop3.txt";
57             string fileText = File.ReadAllText(path,Encoding.Default);
58             Console.WriteLine(fileText);
59         }
60         private static void WriteFileByByteArray()
61         {
62             string path = @"C:UsersAdministratorDesktop1.txt";
63             string fileStr = "大家好，我来了，我的号码是1388888888";
64             byte[] fileByte = Encoding.Default.GetBytes(fileStr);
65             File.WriteAllBytes(path, fileByte);
66             Console.WriteLine("Write Sucessfully...");
67         }
68         private static void WriteFileByLines()
69         {
70             string path = @"C:UsersAdministratorDesktop1.txt";
71             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" };
72             File.WriteAllLines(path, fileArray);
73             Console.WriteLine("Write Sucessfully...");
74         }
75         private static void WriteFileByText()
76         {
77             string path = @"C:UsersAdministratorDesktop1.txt";
78             //File.WriteAllText(path, "落霞与孤鹜齐飞，秋水共长天一色。");
79             File.AppendAllText(path, "宜将剩勇追穷寇，不可沽名学霸王！");
80             Console.WriteLine("Write Sucessfully...");
81         }
82         private static void UseDirectory()
83         {
84             //Directory.CreateDirectory(@"C:UsersAdministratorDesktopNewFolder");
85             //Directory.Delete(@"C:UsersAdministratorDesktopNewFolder",true);
86 
87             string[] files = Directory.GetFiles(@"D:迅雷下载", "*.rmvb",SearchOption.TopDirectoryOnly);
88             foreach (var file in files)
89             {
90                 Console.WriteLine(file);
91             }
92             Console.WriteLine("Get File Successfully...");
93 
94         }
95     }