一、今日学习内容——.net

  今天完成了实验四：文件操作

代码：

using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form4 : Form
    {
        public Form4()
        {
            InitializeComponent();
            TreeNode myComputerNode = new TreeNode("我的电脑"); 
            treeView1.Nodes.Add(myComputerNode);
            listViewShow(myComputerNode);  
        }

        //编写 ListView 控件的方法 listViewShow(TreeNode dirNode)
        private void listViewShow(TreeNode dirNode)
        {
            listView1.Clear();
            if (dirNode.Parent == null)
            {
                foreach (string DrvName in Directory.GetLogicalDrives())
                {
                    ListViewItem aItem = new ListViewItem(DrvName);
                    listView1.Items.Add(aItem);
                }
            }
            else
            {
                foreach (string DirName in Directory.GetDirectories((string)dirNode.Tag))
                {
                    ListViewItem aItem = new ListViewItem(DirName);
                    listView1.Items.Add(aItem);
                }
                foreach (string fileName in Directory.GetFiles((string)dirNode.Tag))
                {
                    ListViewItem aItem = new ListViewItem(fileName);
                    listView1.Items.Add(aItem);
                }
            }
        } 

        //listview的重载方法
        private void listViewShow(string dirName)
        {
            listView1.Clear();
            try
            {
                foreach (string DirName in Directory.GetDirectories(dirName))
                {
                    ListViewItem aItem = new ListViewItem(DirName);
                    listView1.Items.Add(aItem);
                }
                foreach (string fileName in Directory.GetFiles(dirName))
                {
                    ListViewItem aItem = new ListViewItem(fileName);
                    listView1.Items.Add(aItem);
                }
            }
            catch
            {
            }
        }

        //编写 DirTreeShow(TreeNode dirNode)方法
        private void DirTreeShow(TreeNode dirNode) 
        { 
            try 
            { 
                if (dirNode.Nodes.Count == 0)                 
                { 
                    if (dirNode.Parent == null)
                    { 
                        foreach (string DrvName in Directory.GetLogicalDrives())
                            { 
                                TreeNode  aNode= new TreeNode(DrvName);
                                aNode.Tag=DrvName;
                                dirNode.Nodes.Add(aNode);
                             } 
                     }
                    else
                    { 
                        foreach(string DirName in Directory.GetDirectories((string)dirNode.Tag))
                        { 
                            TreeNode  aNode=new TreeNode(DirName);
                            aNode.Tag=DirName;
                            dirNode.Nodes.Add(aNode);
                        }
                    }
                }
            }
            catch
            {
            }
        }

        //编写 TreeView 控件的 AfterSelect 事件代码
        private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {
            listViewShow(e.Node);
            DirTreeShow(e.Node);
        }


        //编写 ListView 控件的 DoubleClick 事件代码。 
        private void listView1_SelectedIndexChanged(object sender, EventArgs e)
        {
            foreach (int listIndex in listView1.SelectedIndices)
            {
                listViewShow(listView1.Items[listIndex].Text);
            } 
        } 
        
    }
}

运行截图：

 二、遇到的问题

    缺少相应控件的事件代码，运行报错

三、明日计划

   明天继续完成大作业