Csharp/CSharp Tutorial/GUI Windows Forms/ListView

Fill data from Database to ListView

using System;
using System.Data.SqlClient;
using System.Data;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
  public class DataReaderTest : System.Windows.Forms.Form
  {
    public DataReaderTest()
    {
      this.lvCustomers = new System.Windows.Forms.ListView();
      this.SuspendLayout();
      // 
      this.lvCustomers.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left) 
        | System.Windows.Forms.AnchorStyles.Right);
      this.lvCustomers.Location = new System.Drawing.Point(8, 8);
      this.lvCustomers.Name = "lvCustomers";
      this.lvCustomers.Size = new System.Drawing.Size(276, 248);
      this.lvCustomers.TabIndex = 0;
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 266);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {this.lvCustomers});
      this.Load += new System.EventHandler(this.DataReaderTest_Load);
      this.ResumeLayout(false);
    }
    private System.Windows.Forms.ListView lvCustomers;
    private string connectionString = "Data Source=localhost;Initial Catalog=Northwind;Integrated Security=SSPI";
    private void DataReaderTest_Load(object sender, System.EventArgs e)
    {
      string SQL = "SELECT * FROM Customers";
      lvCustomers.View = View.Details;
      SqlConnection con = new SqlConnection(connectionString);
      SqlCommand cmd = new SqlCommand(SQL, con);
      SqlDataReader r = null;
           con.Open();
      r = cmd.ExecuteReader();
      for (int i = 0; i <= r.FieldCount - 1; i++)
      {
        lvCustomers.Columns.Add("Column " + (i + 1).ToString(),100, HorizontalAlignment.Left);
      }
      while (r.Read())
      {
        ListViewItem lvItem = new ListViewItem(r[0].ToString());
        for (int i = 1; i <= r.FieldCount - 1; i++)
        {
          lvItem.SubItems.Add(r[i].ToString());
        }
        lvCustomers.Items.Add(lvItem);
      }
      con.Close();
    }
    public static void Main()
    {
      Application.Run(new DataReaderTest());
    }
  }

ListView Drives

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
public sealed class Win32
{
  public const uint DRIVE_UNKNOWN     = 0;
  public const uint DRIVE_NO_ROOT_DIR = 1;
  public const uint DRIVE_REMOVABLE   = 2;
  public const uint DRIVE_FIXED       = 3;
  public const uint DRIVE_REMOTE      = 4;
  public const uint DRIVE_CDROM       = 5;
  public const uint DRIVE_RAMDISK     = 6;
  [DllImport("kernel32.dll")]
  public static extern uint GetDriveType(
    string lpRootPathName   // root directory
    );
  [DllImport("kernel32.dll")]
  private static extern bool GetVolumeInformation(
    string lpRootPathName,          // Root directory
    StringBuilder lpVolumeNameBuffer,    // Volume name buffer
    int nVolumeNameSize,          // Length of name buffer
    ref int lpVolumeSerialNumber,      // Volume serial number
    ref int lpMaximumComponentLength,    // Maximum file name length
    ref int lpFileSystemFlags,        // File system options
    StringBuilder lpFileSystemNameBuffer,  // File system name buffer
    int nFileSystemNameSize          // Length of file system name buffer
    );
  public static string GetVolumeName(string strRootPath)
  {
    StringBuilder sbVolumeName = new StringBuilder(256);
    StringBuilder sbFileSystemName = new StringBuilder(256);
    int nVolSerial = 0;
    int nMaxCompLength = 0;
    int nFSFlags = 0;
    bool bResult = GetVolumeInformation(strRootPath,sbVolumeName,256,
      ref nVolSerial, ref nMaxCompLength, ref nFSFlags, sbFileSystemName, 256);
    if (true == bResult)
    {
      return sbVolumeName.ToString();
    }
    else
    {
      return "";
    }
  }
}
  public class DrivesForm : System.Windows.Forms.Form
  {
    private System.Windows.Forms.ListView lvDrives;
    private System.Windows.Forms.MainMenu mnuMain;
    private System.Windows.Forms.MenuItem menuItem1;
    private System.Windows.Forms.MenuItem mnuLargeIcons;
    private System.Windows.Forms.MenuItem mnuSmallIcons;
    private System.Windows.Forms.MenuItem mnuList;
    private System.Windows.Forms.MenuItem mnuDetails;
    public DrivesForm()
    {
      this.lvDrives = new System.Windows.Forms.ListView();
      this.mnuMain = new System.Windows.Forms.MainMenu();
      this.menuItem1 = new System.Windows.Forms.MenuItem();
      this.mnuLargeIcons = new System.Windows.Forms.MenuItem();
      this.mnuSmallIcons = new System.Windows.Forms.MenuItem();
      this.mnuList = new System.Windows.Forms.MenuItem();
      this.mnuDetails = new System.Windows.Forms.MenuItem();
      this.SuspendLayout();
      // 
      // lvDrives
      // 
      this.lvDrives.Dock = System.Windows.Forms.DockStyle.Fill;
      this.lvDrives.Name = "lvDrives";
      this.lvDrives.Size = new System.Drawing.Size(336, 277);
      this.lvDrives.TabIndex = 0;
      this.lvDrives.View = System.Windows.Forms.View.List;
      this.lvDrives.ItemActivate += new System.EventHandler(this.ItemActivated);
      this.lvDrives.SelectedIndexChanged += new System.EventHandler(this.OnSelItemChanged);
      // 
      // mnuMain
      // 
      this.mnuMain.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                          this.menuItem1});
      // 
      // menuItem1
      // 
      this.menuItem1.Index = 0;
      this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                            this.mnuLargeIcons,
                                            this.mnuSmallIcons,
                                            this.mnuList,
                                            this.mnuDetails});
      this.menuItem1.Text = "Style";
      // 
      // mnuLargeIcons
      // 
      this.mnuLargeIcons.Index = 0;
      this.mnuLargeIcons.Text = "Large Icons";
      this.mnuLargeIcons.Click += new System.EventHandler(this.OnMenuClick);
      // 
      // mnuSmallIcons
      // 
      this.mnuSmallIcons.Index = 1;
      this.mnuSmallIcons.Text = "Small Icons";
      this.mnuSmallIcons.Click += new System.EventHandler(this.OnMenuClick);
      // 
      // mnuList
      // 
      this.mnuList.Index = 2;
      this.mnuList.Text = "List";
      this.mnuList.Click += new System.EventHandler(this.OnMenuClick);
      // 
      // mnuDetails
      // 
      this.mnuDetails.Index = 3;
      this.mnuDetails.Text = "Details";
      this.mnuDetails.Click += new System.EventHandler(this.OnMenuClick);
      // 
      // DrivesForm
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(336, 277);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                      this.lvDrives});
      this.Menu = this.mnuMain;
      this.Name = "DrivesForm";
      this.Text = "Drives on computer";
      this.ResumeLayout(false);
      // Small and large image lists
      lvDrives.SmallImageList = new ImageList();
      Bitmap icoSmall = new Bitmap(GetType(), "LvIcons.bmp");
      icoSmall.MakeTransparent(Color.FromArgb(0xff, 0x00, 0xff));
      lvDrives.SmallImageList.Images.AddStrip(icoSmall);
      lvDrives.LargeImageList = new ImageList();
      Bitmap icoLarge = new Bitmap(GetType(), "LvIconsLarge.bmp");
      icoLarge.MakeTransparent(Color.FromArgb(0xff, 0x00, 0xff));
      Size sizeImages = new Size(32,32);
      lvDrives.LargeImageList.ImageSize = sizeImages;
      lvDrives.LargeImageList.Images.AddStrip(icoLarge);
      lvDrives.Columns.Add("Drive", 100, HorizontalAlignment.Left);
      lvDrives.Columns.Add("Type", 150, HorizontalAlignment.Left);
      ListDrives();
    }
    protected void ListDrives() 
    {
      string[] drives = Directory.GetLogicalDrives();
      string strDriveType = "";
      for (int i=0; i < drives.Length; i++)
      {
        string strDriveName = Win32.GetVolumeName(drives[i]);
        ListViewItem lvi = new ListViewItem();
        // Note: Network drives show up as local.
        switch(Win32.GetDriveType(drives[i])) 
        {
          case Win32.DRIVE_CDROM:
            strDriveType = "Compact Disc";
            lvi.ImageIndex = 1;
            break;
          case Win32.DRIVE_FIXED:
            strDriveType = "Local Disc";
            lvi.ImageIndex = 0;
            break;
          case Win32.DRIVE_REMOVABLE:
            strDriveType = "Floppy";
            lvi.ImageIndex = 2;
            break;
          default:
            goto case Win32.DRIVE_FIXED;
        }
        if (0 == strDriveName.Length) strDriveName = strDriveType;
        lvi.Text = strDriveName + " (" + drives[i].Substring(0, 2) + ")";
        lvi.SubItems.Add(strDriveType);
        this.lvDrives.Items.Add(lvi);
      }
    }

    static void Main() 
    {
      Application.Run(new DrivesForm());
    }
    private void OnMenuClick(object sender, System.EventArgs e)
    {
      MenuItem mnu = (MenuItem)sender;
      switch(mnu.Text) 
      {
        case "Large Icons": lvDrives.View = View.LargeIcon; break;
        case "Small Icons": lvDrives.View = View.SmallIcon; break;
        case "List": lvDrives.View = View.List; break;
        default: lvDrives.View = View.Details; break;
      }
    }
    private void OnSelItemChanged(object sender, System.EventArgs e)
    {
      string strSelected = "";
      foreach (ListViewItem lvi in lvDrives.SelectedItems)
      {
        strSelected += " " + lvi.Text;
      }
      MessageBox.Show(strSelected);
    }
    private void ItemActivated(object sender, System.EventArgs e)
    {
      MessageBox.Show("Item activated");
    }
  }

ListView for File and Folder

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

   public class Form1 : Form
   {
      private System.Collections.Specialized.StringCollection folderCol;
      public Form1()
      {
         InitializeComponent();
         folderCol = new System.Collections.Specialized.StringCollection();
         CreateHeadersAndFillListView();
         PaintListView(@"C:\");
         folderCol.Add(@"C:\");
      }
      private void CreateHeadersAndFillListView()
      {
         ColumnHeader colHead;
         colHead = new ColumnHeader();
         colHead.Text = "Filename";
         this.listViewFilesAndFolders.Columns.Add(colHead); 
         colHead = new ColumnHeader();
         colHead.Text = "Size";
         this.listViewFilesAndFolders.Columns.Add(colHead); 
         colHead = new ColumnHeader();
         colHead.Text = "Last accessed";
         this.listViewFilesAndFolders.Columns.Add(colHead);
      }
      private void PaintListView(string root)
      {
         try
         {
            ListViewItem lvi;
            ListViewItem.ListViewSubItem lvsi;
            if (root.rupareTo("") == 0)
               return;
            DirectoryInfo dir = new DirectoryInfo(root);
            DirectoryInfo[] dirs = dir.GetDirectories(); 
            FileInfo[] files = dir.GetFiles();           
            this.listViewFilesAndFolders.Items.Clear();
            this.labelCurrentPath.Text = root;
            this.listViewFilesAndFolders.BeginUpdate();
            foreach (DirectoryInfo di in dirs)
            {
               lvi = new ListViewItem();
               lvi.Text = di.Name; 
               lvi.Tag = di.FullName; 
               lvsi = new ListViewItem.ListViewSubItem();
               lvsi.Text = ""; 
               lvi.SubItems.Add(lvsi); 
               lvsi = new ListViewItem.ListViewSubItem();
               lvsi.Text = di.LastAccessTime.ToString(); 
               lvi.SubItems.Add(lvsi); 
               this.listViewFilesAndFolders.Items.Add(lvi);
            }
            foreach (FileInfo fi in files)
            {
               lvi = new ListViewItem();
               lvi.Text = fi.Name; 
               lvi.Tag = fi.FullName; 
               lvsi = new ListViewItem.ListViewSubItem();
               lvsi.Text = fi.Length.ToString(); 
               lvi.SubItems.Add(lvsi); 
               lvsi = new ListViewItem.ListViewSubItem();
               lvsi.Text = fi.LastAccessTime.ToString(); 
               lvi.SubItems.Add(lvsi); 
               this.listViewFilesAndFolders.Items.Add(lvi);
            }
            this.listViewFilesAndFolders.EndUpdate();
         }
         catch (System.Exception err)
         {
            MessageBox.Show("Error: " + err.Message);
         }
      }
      private void listViewFilesAndFolders_ItemActivate(object sender, EventArgs e)
      {
         System.Windows.Forms.ListView lw = (System.Windows.Forms.ListView)sender;
         string filename = lw.SelectedItems[0].Tag.ToString();
         if (lw.SelectedItems[0].ImageIndex != 0)
         {
            try
            {
               System.Diagnostics.Process.Start(filename);
            }
            catch
            {
               return;
            }
         }
         else
         {
            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;
      }
      private void InitializeComponent()
      {
         this.labelCurrentPath = new System.Windows.Forms.Label();
         this.listViewFilesAndFolders = new System.Windows.Forms.ListView();
         this.groupBoxViewMode = new System.Windows.Forms.GroupBox();
         this.radioButtonTile = new System.Windows.Forms.RadioButton();
         this.radioButtonDetails = new System.Windows.Forms.RadioButton();
         this.radioButtonList = new System.Windows.Forms.RadioButton();
         this.radioButtonSmallIcon = new System.Windows.Forms.RadioButton();
         this.radioButtonLargeIcon = new System.Windows.Forms.RadioButton();
         this.buttonBack = new System.Windows.Forms.Button();
         this.groupBoxViewMode.SuspendLayout();
         this.SuspendLayout();
         // 
         this.labelCurrentPath.Location = new System.Drawing.Point(12, 9);
         this.labelCurrentPath.Name = "labelCurrentPath";
         this.labelCurrentPath.Size = new System.Drawing.Size(429, 13);
         this.labelCurrentPath.TabIndex = 0;
         // 
         this.listViewFilesAndFolders.LargeImageList = this.imageListLarge;
         this.listViewFilesAndFolders.Location = new System.Drawing.Point(12, 25);
         this.listViewFilesAndFolders.Size = new System.Drawing.Size(429, 208);
         this.listViewFilesAndFolders.UseCompatibleStateImageBehavior = false;
         this.listViewFilesAndFolders.View = System.Windows.Forms.View.Details;
         this.listViewFilesAndFolders.ItemActivate += new System.EventHandler(this.listViewFilesAndFolders_ItemActivate);
         // 
         this.groupBoxViewMode.Controls.Add(this.radioButtonTile);
         this.groupBoxViewMode.Controls.Add(this.radioButtonDetails);
         this.groupBoxViewMode.Controls.Add(this.radioButtonList);
         this.groupBoxViewMode.Controls.Add(this.radioButtonSmallIcon);
         this.groupBoxViewMode.Controls.Add(this.radioButtonLargeIcon);
         this.groupBoxViewMode.Location = new System.Drawing.Point(447, 25);
         this.groupBoxViewMode.Name = "groupBoxViewMode";
         this.groupBoxViewMode.Size = new System.Drawing.Size(105, 208);
         this.groupBoxViewMode.TabIndex = 2;
         this.groupBoxViewMode.TabStop = false;
         this.groupBoxViewMode.Text = "View Mode";
         // 
         // radioButtonTile
         // 
         this.radioButtonTile.AutoSize = true;
         this.radioButtonTile.Location = new System.Drawing.Point(6, 111);
         this.radioButtonTile.Name = "radioButtonTile";
         this.radioButtonTile.Size = new System.Drawing.Size(42, 17);
         this.radioButtonTile.TabIndex = 4;
         this.radioButtonTile.Text = "Tile";
         this.radioButtonTile.UseVisualStyleBackColor = true;
         this.radioButtonTile.CheckedChanged += new System.EventHandler(this.radioButtonTile_CheckedChanged);
         // 
         // radioButtonDetails
         // 
         this.radioButtonDetails.AutoSize = true;
         this.radioButtonDetails.Checked = true;
         this.radioButtonDetails.Location = new System.Drawing.Point(6, 88);
         this.radioButtonDetails.Name = "radioButtonDetails";
         this.radioButtonDetails.Size = new System.Drawing.Size(57, 17);
         this.radioButtonDetails.TabIndex = 3;
         this.radioButtonDetails.TabStop = true;
         this.radioButtonDetails.Text = "Details";
         this.radioButtonDetails.UseVisualStyleBackColor = true;
         this.radioButtonDetails.CheckedChanged += new System.EventHandler(this.radioButtonDetails_CheckedChanged);
         // 
         // radioButtonList
         // 
         this.radioButtonList.AutoSize = true;
         this.radioButtonList.Location = new System.Drawing.Point(6, 65);
         this.radioButtonList.Name = "radioButtonList";
         this.radioButtonList.Size = new System.Drawing.Size(41, 17);
         this.radioButtonList.TabIndex = 2;
         this.radioButtonList.Text = "List";
         this.radioButtonList.UseVisualStyleBackColor = true;
         this.radioButtonList.CheckedChanged += new System.EventHandler(this.radioButtonList_CheckedChanged);
         // 
         // radioButtonSmallIcon
         // 
         this.radioButtonSmallIcon.AutoSize = true;
         this.radioButtonSmallIcon.Location = new System.Drawing.Point(6, 42);
         this.radioButtonSmallIcon.Name = "radioButtonSmallIcon";
         this.radioButtonSmallIcon.Size = new System.Drawing.Size(74, 17);
         this.radioButtonSmallIcon.TabIndex = 1;
         this.radioButtonSmallIcon.Text = "Small Icon";
         this.radioButtonSmallIcon.UseVisualStyleBackColor = true;
         this.radioButtonSmallIcon.CheckedChanged += new System.EventHandler(this.radioButtonSmallIcon_CheckedChanged);
         // 
         // radioButtonLargeIcon
         // 
         this.radioButtonLargeIcon.AutoSize = true;
         this.radioButtonLargeIcon.Location = new System.Drawing.Point(6, 19);
         this.radioButtonLargeIcon.Name = "radioButtonLargeIcon";
         this.radioButtonLargeIcon.Size = new System.Drawing.Size(76, 17);
         this.radioButtonLargeIcon.TabIndex = 0;
         this.radioButtonLargeIcon.Text = "Large Icon";
         this.radioButtonLargeIcon.UseVisualStyleBackColor = true;
         this.radioButtonLargeIcon.CheckedChanged += new System.EventHandler(this.radioButtonLargeIcon_CheckedChanged);
         // 
         // buttonBack
         // 
         this.buttonBack.Location = new System.Drawing.Point(275, 240);
         this.buttonBack.Name = "buttonBack";
         this.buttonBack.Size = new System.Drawing.Size(75, 23);
         this.buttonBack.TabIndex = 3;
         this.buttonBack.Text = "Back";
         this.buttonBack.UseVisualStyleBackColor = true;
         this.buttonBack.Click += new System.EventHandler(this.buttonBack_Click);
         // 
         // imageListSmall
         // 
         this.imageListSmall.TransparentColor = System.Drawing.Color.Transparent;
         this.imageListSmall.Images.SetKeyName(0, "Folder 16x16.ICO");
         this.imageListSmall.Images.SetKeyName(1, "Text 16x16.ICO");
         // 
         // imageListLarge
         // 
         this.imageListLarge.TransparentColor = System.Drawing.Color.Transparent;
         this.imageListLarge.Images.SetKeyName(0, "Folder32x32.ICO");
         this.imageListLarge.Images.SetKeyName(1, "Text 32x32.ICO");
         // 
         // Form1
         // 
         this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
         this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
         this.ClientSize = new System.Drawing.Size(564, 273);
         this.Controls.Add(this.buttonBack);
         this.Controls.Add(this.groupBoxViewMode);
         this.Controls.Add(this.listViewFilesAndFolders);
         this.Controls.Add(this.labelCurrentPath);
         this.Name = "Form1";
         this.Text = "ListView";
         this.groupBoxViewMode.ResumeLayout(false);
         this.groupBoxViewMode.PerformLayout();
         this.ResumeLayout(false);
      }
      private System.Windows.Forms.Label labelCurrentPath;
      private System.Windows.Forms.ListView listViewFilesAndFolders;
      private System.Windows.Forms.GroupBox groupBoxViewMode;
      private System.Windows.Forms.RadioButton radioButtonTile;
      private System.Windows.Forms.RadioButton radioButtonDetails;
      private System.Windows.Forms.RadioButton radioButtonList;
      private System.Windows.Forms.RadioButton radioButtonSmallIcon;
      private System.Windows.Forms.RadioButton radioButtonLargeIcon;
      private System.Windows.Forms.Button buttonBack;
      private System.Windows.Forms.ImageList imageListSmall;
      private System.Windows.Forms.ImageList imageListLarge;
      [STAThread]
      static void Main()
      {
         Application.EnableVisualStyles();
         Application.SetCompatibleTextRenderingDefault(false);
         Application.Run(new Form1());
      }
   }

ListView Sorter

using System;
using System.Collections;
using System.Windows.Forms;
class FolderHolder: Form
{
    public FolderHolder()
    {
        InitializeComponent();
    }
    private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
    {
        ListViewItemComparer sorter = listView1.ListViewItemSorter as ListViewItemComparer;
        if (sorter == null)
        {
            sorter = new ListViewItemComparer(e.Column);
            listView1.ListViewItemSorter = sorter;
        }
        else
        {
            sorter.Column = e.Column;
        }
        listView1.Sort();
    }
    [STAThread]
    public static void Main(string[] args)
    {
        Application.Run(new FolderHolder());
    }
    private void InitializeComponent()
    {
        System.Windows.Forms.ListViewItem listViewItem1 = new System.Windows.Forms.ListViewItem(new string[] {"1","B","A"}, -1);
        System.Windows.Forms.ListViewItem listViewItem2 = new System.Windows.Forms.ListViewItem(new string[] {"2","A","D"}, -1);
        System.Windows.Forms.ListViewItem listViewItem3 = new System.Windows.Forms.ListViewItem(new string[] {"4","C","B"}, -1);
        this.listView1 = new System.Windows.Forms.ListView();
        this.columnHeader1 = new System.Windows.Forms.ColumnHeader();
        this.columnHeader2 = new System.Windows.Forms.ColumnHeader();
        this.columnHeader3 = new System.Windows.Forms.ColumnHeader();
        this.SuspendLayout();
        // 
        // listView1
        // 
        this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {this.columnHeader1,this.columnHeader2,this.columnHeader3});
        this.listView1.Dock = System.Windows.Forms.DockStyle.Fill;
        this.listView1.GridLines = true;
        this.listView1.Items.AddRange(new System.Windows.Forms.ListViewItem[] {listViewItem1,listViewItem2,listViewItem3});
        this.listView1.Location = new System.Drawing.Point(0, 0);
        this.listView1.Size = new System.Drawing.Size(292, 266);
        this.listView1.View = System.Windows.Forms.View.Details;
        this.listView1.ColumnClick += new System.Windows.Forms.ColumnClickEventHandler(this.listView1_ColumnClick);
        // 
        // FolderHolder
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(292, 266);
        this.Controls.Add(this.listView1);
        this.ResumeLayout(false);
    }
    private System.Windows.Forms.ListView listView1;
    private System.Windows.Forms.ColumnHeader columnHeader1;
    private System.Windows.Forms.ColumnHeader columnHeader2;
    private System.Windows.Forms.ColumnHeader columnHeader3;
}
public class ListViewItemComparer : IComparer
{
    private int column;
    private bool numeric = false;
    public int Column
    {
        get { return column; }
        set { column = value; }
    }
    public bool Numeric
    {
        get { return numeric; }
        set { numeric = value; }
    }
    public ListViewItemComparer(int columnIndex)
    {
        Column = columnIndex;
    }
    public int Compare(object x, object y)
    {
        ListViewItem itemX = x as ListViewItem;
        ListViewItem itemY = y as ListViewItem;
        if (itemX == null && itemY == null) 
           return 0;
        else if (itemX == null) 
           return -1;
        else if (itemY == null) 
           return 1;
        if (itemX == itemY) return 0;
        if (Numeric)
        {
            decimal itemXVal, itemYVal;
            if (!Decimal.TryParse(itemX.SubItems[Column].Text, out itemXVal))
            {
                itemXVal = 0;
            }
            if (!Decimal.TryParse(itemY.SubItems[Column].Text, out itemYVal))
            {
                itemYVal = 0;
            }
            return Decimal.rupare(itemXVal, itemYVal);
        } else {
            string itemXText = itemX.SubItems[Column].Text;
            string itemYText = itemY.SubItems[Column].Text;
            return String.rupare(itemXText, itemYText);
        }
    }
}