.Net-IO

 1  if (!Directory.Exists(LogPath))//检测文件夹是否存在
 2 {
 3 
 4  }
 5 DirectoryInfo directory = new DirectoryInfo(LogPath);//不存在不报错  注意exists属性
 6 Console.WriteLine(string.Format("{0} {1} {2}", directory.FullName, directory.CreationTime, directory.LastWriteTime));
 7   if (!File.Exists(Path.Combine(LogPath, "info.txt")))
 8   {
 9   }
10 
11   FileInfo fileInfo = new FileInfo(Path.Combine(LogPath, "info.txt"));
12   Console.WriteLine(string.Format("{0} {1} {2}", fileInfo.FullName, fileInfo.CreationTime, fileInfo.LastWriteTime));

1      Directory.Move(LogPath, LogMovePath);//移动  原文件夹就不在了  相当于剪切
2      Directory.Delete(LogMovePath);//删除
3       File.Copy(fileName, fileNameCopy);
4       File.Move(fileName, fileNameMove);
5      File.Delete(fileNameMove);//尽量不要delete
6     
7     切记   Directory.Copy(LogPath, LogMovePath);是错误的Directory是没有Copy方法的
8      

 1      {   
 2                 //File
 3                 string fileName = Path.Combine(LogPath, "log.txt");
 4                 string fileNameCopy = Path.Combine(LogPath, "logCopy.txt");
 5                 string fileNameMove = Path.Combine(LogPath, "logMove.txt");
 6                 
 7                 if (!File.Exists(fileName))
 8                 {
 9                     Directory.CreateDirectory(LogPath);//创建了文件夹之后，才能创建里面的文件
10                     using (FileStream fileStream = File.Create(fileName))//打开文件流 （创建文件并写入）
11                     {
12                         string name = "12345567778890";
13                         byte[] bytes = Encoding.Default.GetBytes(name);
14                         fileStream.Write(bytes, 0, bytes.Length);
15                         fileStream.Flush();
16                     }
17                     using (FileStream fileStream = File.Create(fileName))//打开文件流 （创建文件并写入）
18                     {
19                         StreamWriter sw = new StreamWriter(fileStream);
20                         sw.WriteLine("StreamWriter");
21                         sw.Flush();
22                     }
23 
24                     using (StreamWriter sw = File.AppendText(fileName))//流写入器（创建/打开文件并写入）
25                     {
26                         string msg = "YZMAppendText";
27                         sw.WriteLine(msg);
28                         sw.Flush();
29                     }
30                     using (StreamWriter sw = File.AppendText(fileName))//流写入器（创建/打开文件并写入）
31                     {
32                         string name = "StreamWriterbyte";
33                         byte[] bytes = Encoding.Default.GetBytes(name);
34                         sw.BaseStream.Write(bytes, 0, bytes.Length);
35                         sw.Flush();
36                     }
37 
38 
39 
40                     foreach (string result in File.ReadAllLines(fileName))
41                     {
42                         Console.WriteLine(result);
43                     }
44                     string sResult = File.ReadAllText(fileName);
45                     Byte[] byteContent = File.ReadAllBytes(fileName);
46                     string sResultByte = System.Text.Encoding.UTF8.GetString(byteContent);
47 
48                     using (FileStream stream = File.OpenRead(fileName))//分批读取可以有效的防止文件过大打不开的效果
49                     {
50                         int length = 5;
51                         int result = 0;
52 
53                         do
54                         {
55                             byte[] bytes = new byte[length];
56                             result = stream.Read(bytes, 0, 5);//自己定义byte的长度
57                             for (int i = 0; i < result; i++)
58                             {
59                                 Console.WriteLine(bytes[i].ToString());
60                             }
61                         }
62                         while (length == result);
63                     }
64 
65                     File.Copy(fileName, fileNameCopy);
66                     File.Move(fileName, fileNameMove);
67                     File.Delete(fileNameCopy);
68                     File.Delete(fileNameMove);//尽量不要delete
69                 }
70             }