程序效果图:
程序关键代码:
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.IO; 7 using System.Linq; 8 using System.Text; 9 using System.Threading.Tasks; 10 using System.Windows.Forms; 11 12 namespace WindowsFormsApplication 13 { 14 public partial class Form1 : Form 15 { 16 public Form1() 17 { 18 InitializeComponent(); 19 } 20 21 private void Form1_Load(object sender, EventArgs e) 22 { 23 24 //获取小说所在目录路径 25 string appPath = AppDomain.CurrentDomain.BaseDirectory; 26 string storyDireName = "福尔摩斯探案集_柯南 ▪ 道尔"; 27 string storyDirePath = Path.Combine(appPath, storyDireName); 28 29 //使用小说文件夹名称作为根节点 30 TreeNode rootNode = treeView1.Nodes.Add(storyDireName); 31 32 BingdingTreeView(rootNode, storyDirePath); 33 34 35 } 36 37 private void BingdingTreeView(TreeNode node, string direPath) 38 { 39 //获取指定目录下的文件夹和文件 40 string[] dires = Directory.GetDirectories(direPath); //文件夹路径集合 41 string[] files = Directory.GetFiles(direPath);//文件路径集合 42 43 44 foreach (string dire in dires)//绑定文件夹 45 { 46 string direName = Path.GetFileName(dire); 47 TreeNode subNode = node.Nodes.Add(direName); 48 49 BingdingTreeView(subNode, dire); //递归 50 } 51 52 foreach (string file in files)//绑定文件 53 { 54 string fileName = Path.GetFileName(file); 55 TreeNode subNode = node.Nodes.Add(fileName); 56 subNode.Tag = file; //文件路径关联 57 } 58 59 }// END BingdingTreeView() 60 61 62 63 64 65 private void treeView1_AfterSelect(object sender, TreeViewEventArgs e) 66 { 67 68 if (e.Node.Tag == null) return; 69 70 string filePath = e.Node.Tag.ToString(); 71 StringBuilder sb = new StringBuilder(); 72 73 using (Stream fsRead = new FileStream(filePath, FileMode.Open, FileAccess.Read)) 74 { 75 byte[] buffer = new byte[1024 * 5]; //每次读5kb 76 int readByteCount = 0; //实际读到的字节数 77 while ((readByteCount = fsRead.Read(buffer, 0, buffer.Length)) != 0) 78 { 79 string context = Encoding.Default.GetString(buffer, 0, readByteCount); 80 sb.Append(context); 81 } 82 } // END Using 83 84 textBox1.Text = sb.ToString(); 85 } 86 87 } 88 }
编写递归说明:
递归简单来说就是函数调用自己,因此在编写时很容易出现无限循环的错误。
编写递归函数时,需要实现两部分:基线条件和递归条件。递归条件值的是函数调用自己,基线条件则指的是函数不在调用自己,从而避免出现无限循环。
此案例的递归条件: