c# ListView

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  // Attempt to run the file. System.Diagnostics.Process.Start(filename);

//folderCol 可以存放一個路徑的   棧（用於返回功能的設計）private System.Collections.Specialized.StringCollection folderCol;

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO;namespace ListView{  public partial class Form1 : Form  {    private System.Collections.Specialized.StringCollection folderCol;    public Form1()    {      InitializeComponent();      // Init ListView and folder collection      folderCol = new System.Collections.Specialized.StringCollection();      CreateHeadersAndFillListView();      PaintListView(@"C:\");      folderCol.Add(@"C:\");    }    private void CreateHeadersAndFillListView()    {      ColumnHeader colHead;      // First header      colHead = new ColumnHeader();      colHead.Text = "Filename";      listViewFilesAndFolders.Columns.Add(colHead); // Insert the header      // Second header      colHead = new ColumnHeader();      colHead.Text = "Size";      listViewFilesAndFolders.Columns.Add(colHead); // Insert the header      // Third header      colHead = new ColumnHeader();      colHead.Text = "Last accessed";      listViewFilesAndFolders.Columns.Add(colHead); // Insert the header    }    private void PaintListView(string root)    {      try      {        // Two local variables that are used to create the items to insert        ListViewItem lvi;        ListViewItem.ListViewSubItem lvsi;        // If there’s no root folder, we can’t insert anything.        if (string.IsNullOrEmpty(root))          return;        // Get information about the root folder.        DirectoryInfo dir = new DirectoryInfo(root);        // Retrieve the files and folders from the root folder.        DirectoryInfo[] dirs = dir.GetDirectories(); // Folders        FileInfo[] files = dir.GetFiles();           // Files        // Clear the ListView. Note that we call the Clear method on the        // Items collection rather than on the ListView itself.        // The Clear method of the ListView remove everything, including column        // headers, and we only want to remove the items from the view.        listViewFilesAndFolders.Items.Clear();        // Set the label with the current path.        labelCurrentPath.Text = root;        // Lock the ListView for updates.        listViewFilesAndFolders.BeginUpdate();        // Loop through all folders in the root folder and insert them.        foreach (DirectoryInfo di in dirs)        {          // Create the main ListViewItem.          lvi = new ListViewItem();          lvi.Text = di.Name; // Folder name          lvi.ImageIndex = 0; // The folder icon has index 0          lvi.Tag = di.FullName; // Set the tag to the qualified path of the          // folder          // Create the two ListViewSubItems.          lvsi = new ListViewItem.ListViewSubItem();          lvsi.Text = ""; // Size—a folder has no size and so this column          // is empty          lvi.SubItems.Add(lvsi); // Add the subitem to the ListViewItem          lvsi = new ListViewItem.ListViewSubItem();          lvsi.Text = di.LastAccessTime.ToString(); // Last accessed column          lvi.SubItems.Add(lvsi); // Add the subitem to the ListViewItem.          // Add the ListViewItem to the Items collection of the ListView.          listViewFilesAndFolders.Items.Add(lvi);        }        // Loop through all the files in the root folder.        foreach (FileInfo fi in files)        {          // Create the main ListViewItem.          lvi = new ListViewItem();          lvi.Text = fi.Name; // Filename          lvi.ImageIndex = 1; // The icon we use to represent a folder has          // index 1.          lvi.Tag = fi.FullName; // Set the tag to the qualified path of the          // file.          // Create the two subitems.          lvsi = new ListViewItem.ListViewSubItem();          lvsi.Text = fi.Length.ToString(); // Length of the file          lvi.SubItems.Add(lvsi); // Add to the SubItems collection          lvsi = new ListViewItem.ListViewSubItem();          lvsi.Text = fi.LastAccessTime.ToString(); // Last Accessed Column          lvi.SubItems.Add(lvsi); // Add to the SubItems collection          // Add the item to the Items collection of the ListView.          listViewFilesAndFolders.Items.Add(lvi);        }        // Unlock the ListView. The items that have been inserted will now        // be displayed.        listViewFilesAndFolders.EndUpdate();      }      catch (System.Exception err)      {        MessageBox.Show("Error: " + err.Message);      }    }    private void listViewFilesAndFolders_ItemActivate(object sender, EventArgs e)    {      // Cast the sender to a ListView and get the tag of the first selected      // item.      System.Windows.Forms.ListView lw = (System.Windows.Forms.ListView)sender;      string filename = lw.SelectedItems[0].Tag.ToString();      if (lw.SelectedItems[0].ImageIndex != 0)      {        try        {          // Attempt to run the file.          System.Diagnostics.Process.Start(filename);        }        catch        {          // If the attempt fails we simply exit the method.          return;        }      }      else      {        // Insert the items.        PaintListView(filename);        folderCol.Add(filename);      }    }    private void buttonBack_Click(object sender, EventArgs e)    {      if (folderCol.Count > 1)      {        PaintListView(folderCol[folderCol.Count - 2].ToString());        folderCol.RemoveAt(folderCol.Count - 1);      }      else        PaintListView(folderCol[0].ToString());    }    private void radioButtonLargeIcon_CheckedChanged(object sender, EventArgs e)    {      RadioButton rdb = (RadioButton)sender;      if (rdb.Checked)        this.listViewFilesAndFolders.View = View.LargeIcon;    }    private void radioButtonSmallIcon_CheckedChanged(object sender, EventArgs e)    {      RadioButton rdb = (RadioButton)sender;      if (rdb.Checked)        this.listViewFilesAndFolders.View = View.SmallIcon;    }    private void radioButtonList_CheckedChanged(object sender, EventArgs e)    {      RadioButton rdb = (RadioButton)sender;      if (rdb.Checked)        this.listViewFilesAndFolders.View = View.List;    }    private void radioButtonDetails_CheckedChanged(object sender, EventArgs e)    {      RadioButton rdb = (RadioButton)sender;      if (rdb.Checked)        this.listViewFilesAndFolders.View = View.Details;    }    private void radioButtonTile_CheckedChanged(object sender, EventArgs e)    {      RadioButton rdb = (RadioButton)sender;      if (rdb.Checked)        this.listViewFilesAndFolders.View = View.Tile;            }  }}

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c# ListView