文件操作，父目录，子目录，所有文件、文件夹，属性信代码,C#代码库,德仔网

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【C#】文件操作，父目录，子目录，所有文件、文件夹，属性信
作者:鑫炫 / 发布于2017/4/10/ 388
using System;
using System.IO;
using System.Windows.Forms;
namespace FileProperties
{
    public partial class Form1 : Form
    {
        private string currentFolderPath;
        public Form1()
        {
            InitializeComponent();
        }
        protected void ClearAllFields()
        {
            listBoxFolders.Items.Clear();
            listBoxFiles.Items.Clear();
            txtBoxFolder.Text = "";
            txtBoxFileName.Text = "";
            txtBoxCreationTime.Text = "";
            txtBoxLastAccessTime.Text = "";
            txtBoxLastWriteTime.Text = "";
            txtBoxFileSize.Text = "";
        }
        /// <summary>
        /// 显示文件信息
        /// </summary>
        /// <param name="fileFullName">文件完整路径+文件名</param>
        protected void DisplayFileInfo(string fileFullName)
        {
            FileInfo theFile = new FileInfo(fileFullName);
            if (!theFile.Exists)
                throw new FileNotFoundException("文件: " + fileFullName + "没有找到！");
            txtBoxFileName.Text = theFile.Name;
            txtBoxCreationTime.Text = theFile.CreationTime.ToLongTimeString();
            txtBoxLastAccessTime.Text = theFile.LastAccessTime.ToLongDateString();
            txtBoxLastWriteTime.Text = theFile.LastWriteTime.ToLongDateString();
            txtBoxFileSize.Text = theFile.Length + " bytes";
        }
        /// <summary>
        /// 根据目录名显示其下所有文件、文件夹
        /// </summary>
        /// <param name="folderFullName"></param>
        protected void DisplayFolderList(string folderFullName)
        {
            //先判断这个目录存在不
            DirectoryInfo theFolder = new DirectoryInfo(folderFullName);
            if (!theFolder.Exists)
                throw new DirectoryNotFoundException("Folder not found: "
                                                     + folderFullName);
            ClearAllFields();
            txtBoxFolder.Text = theFolder.FullName;
            currentFolderPath = theFolder.FullName;//当前路径设为全局，便于后面操作
            //获取当前目录下的文件夹
            foreach (DirectoryInfo nextFolder in theFolder.GetDirectories())
                listBoxFolders.Items.Add(nextFolder.Name);
            //获取当前目录下的文件
            foreach (FileInfo nextFile in theFolder.GetFiles())
                listBoxFiles.Items.Add(nextFile.Name);
        }
        protected void OnDisplayButtonClick(object sender , EventArgs e)
        {
            try
            {
                ///判断是否是文件夹，是 直接返回。否则 继续
                string folderPath = txtBoxInput.Text;
                DirectoryInfo theFolder = new DirectoryInfo(folderPath);
                if (theFolder.Exists)
                {
                    DisplayFolderList(theFolder.FullName);
                    return;
                }
                //判断是否文件
                FileInfo theFile = new FileInfo(folderPath);
                if (theFile.Exists)
                {
                    //FileInfo.Directory 获取当前文件所在的目录
                    DisplayFolderList(theFile.Directory.FullName);
                    //获取当前文件在文件系统中的索引
                    int index = listBoxFiles.Items.IndexOf(theFile.Name);
                    //设置其选择触发选择事件
                    listBoxFiles.SetSelected(index , true);
                    return;
                }
                throw new FileNotFoundException("没有文件或文件夹的名字是 "
                                                + ": " + txtBoxInput.Text);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        /// <summary>
        /// 文件被选择时触发
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void OnListBoxFilesSelected(object sender , EventArgs e)
        {
            try
            {
                string selectedString = listBoxFiles.SelectedItem.ToString();
                string fullFileName = Path.Combine(currentFolderPath , selectedString);
                DisplayFileInfo(fullFileName);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        //目录被选择时触发
        protected void OnListBoxFoldersSelected(object sender , EventArgs e)
        {
            try
            {
                //获取选择的目录名
                string selectedString = listBoxFolders.SelectedItem.ToString();
                //
                string fullPathName = Path.Combine(currentFolderPath , selectedString);
                DisplayFolderList(fullPathName);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        protected void OnUpButtonClick(object sender , EventArgs e)
        {
            try
            {
                //获取当前目录的父目录
                string folderPath = new FileInfo(currentFolderPath).DirectoryName;
                DisplayFolderList(folderPath);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}
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