C#学习记录9——Streams数据流

 1 using System;
 2 using System.Collections.Generic;
 3 using System.IO;
 4 using System.Text;
 5 
 6 namespace StreamTester
 7 {
 8     class Tester
 9     {
10         static int dirCounter = 1;
11         static int indentLevel = -1;
12 
13         public static void Main()
14         {
15             Tester t = new Tester();
16 
17             // 选择根目录
18             string theDirectory =
19             Environment.GetEnvironmentVariable("SystemRoot");
20             // 如果是在unix linux 等其他系统下，要加下面一句话
21             //string theDirectory = "/tmp";
22 
23             //下面调用方法来浏览该目录，显示数据及子目录
24 
25             DirectoryInfo dir = new DirectoryInfo(theDirectory);
26 
27             t.ExploreDirectory(dir);
28 
29             Console.WriteLine(
30                 "\n\n{0} directories found.\n",
31                 dirCounter);
32         }
33 
34         // 只要找到一个目录就递归的递归的调用自己
35 
36         private void ExploreDirectory(DirectoryInfo dir)
37         {
38             indentLevel++; // 目录层次++
39 
40             for (int i = 0; i < indentLevel; i++)
41                 Console.Write(" "); 
42 
43             Console.WriteLine("[{0}] {1} [{2}]\n",
44                 indentLevel, dir.Name, dir.LastAccessTime);
45 
46             // 得到dir下的所有子目录存入directories[]中
47             DirectoryInfo[] directories = dir.GetDirectories();
48             foreach (DirectoryInfo newDir in directories)
49             {
50                 dirCounter++;
51                 ExploreDirectory(newDir); // 递归调用
52             }
53             indentLevel--; //目录层次--
54         }
55     }
56 }

 1         private void Run()
 2         {
 3             // 打开文件
 4             FileInfo theSourceFile = new FileInfo(
 5                 @"C:\Users\shanyuwang\Desktop\test.txt");
 6 
 7             // 创建text reader
 8             StreamReader reader = theSourceFile.OpenText();
 9 
10             // 创建text writer
11             StreamWriter writer = new StreamWriter(
12                 @"C:\Users\shanyuwang\Desktop\test2.txt", false);
13 
14             string text;
15 
16             // 每次读入一行并写入text，writer
17             do
18             {
19                 text = reader.ReadLine();
20                 writer.WriteLine(text);
21                 Console.WriteLine(text);
22             } while (text != null);
23 
24             // 关闭文件。建议养成的好习惯，避免在后续程序中对文件误操作
25             reader.Close();
26             writer.Close();
27         }

 1 public class Client
 2     {
 3         static public void Main(string[] Args)
 4         {
 5             // http request请求
 6             HttpWebRequest webRequest =
 7                 (HttpWebRequest)WebRequest.Create
 8                     ("http://www.baidu.com/");
 9 
10             // httq response
11             HttpWebResponse webResponse =
12                 (HttpWebResponse)webRequest.GetResponse();
13 
14             // 对response的返回内容读入
15             StreamReader streamReader = new StreamReader(
16                 webResponse.GetResponseStream(), Encoding.ASCII);
17 
18             try
19             {
20                 string outputString;
21                 outputString = streamReader.ReadToEnd();
22                 Console.WriteLine(outputString);
23             }
24             catch
25             {
26                 Console.WriteLine("Exception reading from web page");
27             }
28             streamReader.Close();
29             Console.ReadKey();
30         }
31     }