小学生之文件操作

//创建文件流
FilesStream myfs=new FilesStream(path,FileMode.Create);
//创建写入器
StreamWriter mySw=new StreamWriter(myfs);
//将录入的内容写入文件
mySw.Write("我是好人");
//关闭写入器
mySw.Close();
//关闭文件流
myfs.Close();

 1         /// <summary>
 2         /// 将数据绑定到TreeView控件中的根节点
 3         /// </summary>
 4         private void LoadTreeView() 
 5         {
 6 
 7            DirectoryInfo dir = new DirectoryInfo(@"E:\");
 8             //返回当前目录的子目录
 9            DirectoryInfo[] dirs= dir.GetDirectories();
10            foreach (DirectoryInfo item in dirs)
11            {
12                TreeNode tn = new TreeNode();
13                tn.Text = item.Name;
14                tn.Tag = item.FullName;
15                this.treeView1.Nodes.Add(tn);
16            }
17           
18         }
19         private void Form1_Load(object sender, EventArgs e)
20         {
21             LoadTreeView();
22 
23         }
24         /// <summary>
25         /// 绑定子目录
26         /// </summary>
27         /// <param name="node"></param>
28         private void BindInfo(TreeNode node) 
29         {
30             DirectoryInfo dir = new DirectoryInfo(node.Tag.ToString());
31             DirectoryInfo[] dirs = dir.GetDirectories();
32             foreach (DirectoryInfo item in dirs)
33             {
34                 TreeNode tn = new TreeNode();
35                 tn.Text = item.Name;
36                 tn.Tag = item.FullName;
37                 node.Nodes.Add(tn);
38             }
39             //获取目录下文件列表，dir是目录对象
40             FileInfo[] fileInfo = dir.GetFiles();
41             //定义泛型集合存储文件信息
42             List<MyFile> files = new List<MyFile>();
43             //遍历文件列表
44             foreach (FileInfo item in fileInfo)
45             {
46                 MyFile file = new MyFile();
47                 file.FileName = item.Name;
48                 float value = item.Length;
49                 file.FileLength = float.Parse(Math.Round(value / 1024, 2).ToString());
50                 file.FileType = item.Extension;
51                 file.FilePath = item.FullName;
52                 files.Add(file);
53             }
54             if (this.listView1.Items!=null)
55             {
56                 this.listView1.Items.Clear();
57             }
58             foreach (MyFile item in files)
59             {
60                 ListViewItem lvItem = new ListViewItem(item.FileName);
61                 lvItem.SubItems.Add(item.FileLength.ToString());
62                 lvItem.SubItems.Add(item.FileType);
63                 lvItem.SubItems.Add(item.FilePath);
64                 this.listView1.Items.Add(lvItem);
65             }
66         }
67         //单击绑定文件和文件夹信息
68         private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
69         {
70             //获取TreeView控件中选中的节点
71             TreeNode node = this.treeView1.SelectedNode;
72             BindInfo(node);
73 
74         }

 1         private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)
 2         {
 3             //用户选择目标文件夹
 4         DialogResult result=  folderBrowserDialog1.ShowDialog();
 5            if (result==DialogResult.OK)
 6            {
 7                //源文件路劲
 8                string sourcePath = this.listView1.SelectedItems[0].SubItems[3].Text;
 9                //目标文件路劲
10                string desPath = folderBrowserDialog1.SelectedPath;
11                desPath += "\\" + this.listView1.SelectedItems[0].SubItems[0].Text;
12                //复制文件
13                File.Copy(sourcePath, desPath);
14                MessageBox.Show("复制成功!!!");
15            }
16         }
17 
18         private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
19         {
20             string sourcePath = this.listView1.SelectedItems[0].SubItems[3].Text;
21             File.Delete(sourcePath);
22             MessageBox.Show("删除成功!!");
23             TreeNode node = this.treeView1.SelectedNode;
24             BindInfo(node);
25         }