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.Compare(itemXVal, itemYVal);
} else {
string itemXText = itemX.SubItems[Column].Text;
string itemYText = itemY.SubItems[Column].Text;
return String.Compare(itemXText, itemYText);
}
}
}
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