ListView Custom sort
Imports System
Imports System.Data
Imports System.Collections
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Data.SqlClient
public class MainClass
Shared Sub Main()
Dim form1 As Form = New Form1
Application.Run(form1)
End Sub
End Class
Public Class Form1
' The column currently used for sorting.
Private m_SortingColumn As ColumnHeader
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' Make the ListView column headers.
ListViewMakeColumnHeaders(lvwStudents, _
"ID", HorizontalAlignment.Left, 120, _
"First Name", HorizontalAlignment.Left, 120, _
"Last Name", HorizontalAlignment.Left, 90, _
"Department", HorizontalAlignment.Left, 120, _
"Start Time", HorizontalAlignment.Right, 50, _
"End Time", HorizontalAlignment.Right, 40)
ListViewMakeRow(lvwStudents, 0, _
"01", _
"Joe", _
"Yin", _
"Computer Science", _
"2002", _
"2004")
ListViewMakeRow(lvwStudents, 0, _
"02", _
"Chris", _
"Chan", _
"Chemistry", _
"2000", _
"2004")
ListViewMakeRow(lvwStudents, 0, _
"03", _
"A", _
"B", _
"Physics", _
"2004", _
"2007")
ListViewSizeColumns(lvwStudents, True)
Text = "RunTimeListView (" & lvwStudents.View.ToString & ")"
End Sub
Private Sub ListViewMakeColumnHeaders(ByVal lvw As ListView, ByVal ParamArray header_info() As Object)
lvw.Columns.Clear()
For i As Integer = header_info.GetLowerBound(0) To header_info.GetUpperBound(0) Step 3
Dim col_header As ColumnHeader = lvw.Columns.Add( _
DirectCast(header_info(i), String), _
-1, _
DirectCast(header_info(i + 1), HorizontalAlignment))
col_header.Width = DirectCast(header_info(i + 2), Integer)
Next i
End Sub
Private Sub ListViewMakeRow(ByVal lvw As ListView, ByVal image_index As Integer, ByVal item_title As String, ByVal ParamArray subitem_titles() As String)
Dim new_item As ListViewItem = lvw.Items.Add(item_title)
new_item.ImageIndex = image_index
For i As Integer = subitem_titles.GetLowerBound(0) To subitem_titles.GetUpperBound(0)
new_item.SubItems.Add(subitem_titles(i))
Next i
End Sub
Private Sub ListViewSizeColumns(ByVal lvw As ListView, ByVal allow_room_for_header As Boolean)
Dim new_wid As Integer = -1
If allow_room_for_header Then new_wid = -2
For i As Integer = 0 To lvw.Columns.Count - 1
lvw.Columns(i).Width = new_wid
Next i
End Sub
Private Sub mnuViewDetails_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuViewDetails.Click
lvwStudents.View = View.Details
Text = "RunTimeListView (" & lvwStudents.View.ToString & ")"
End Sub
Private Sub mnuViewLargeIcons_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuViewLargeIcons.Click
lvwStudents.View = View.LargeIcon
Text = "RunTimeListView (" & lvwStudents.View.ToString & ")"
End Sub
Private Sub mnuViewList_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuViewList.Click
lvwStudents.View = View.List
Text = "RunTimeListView (" & lvwStudents.View.ToString & ")"
End Sub
Private Sub mnuViewSmallIcons_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuViewSmallIcons.Click
lvwStudents.View = View.SmallIcon
Text = "RunTimeListView (" & lvwStudents.View.ToString & ")"
End Sub
Private Sub mnuViewTile_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuViewTile.Click
lvwStudents.View = View.Tile
Text = "RunTimeListView (" & lvwStudents.View.ToString & ")"
End Sub
Private Sub lvwStudents_ColumnClick(ByVal sender As System.Object, _
ByVal e As System.Windows.Forms.ColumnClickEventArgs) Handles lvwStudents.ColumnClick
Dim new_sorting_column As ColumnHeader = _
lvwStudents.Columns(e.Column)
Dim sort_order As System.Windows.Forms.SortOrder
If m_SortingColumn Is Nothing Then
sort_order = SortOrder.Ascending
Else
If new_sorting_column.Equals(m_SortingColumn) Then
If m_SortingColumn.Text.StartsWith("> ") Then
sort_order = SortOrder.Descending
Else
sort_order = SortOrder.Ascending
End If
Else
sort_order = SortOrder.Ascending
End If
m_SortingColumn.Text = m_SortingColumn.Text.Substring(2)
End If
m_SortingColumn = new_sorting_column
If sort_order = SortOrder.Ascending Then
m_SortingColumn.Text = "> " & m_SortingColumn.Text
Else
m_SortingColumn.Text = "< " & m_SortingColumn.Text
End If
lvwStudents.ListViewItemSorter = New ListViewComparer(e.Column, sort_order)
lvwStudents.Sort()
End Sub
End Class
Public Class ListViewComparer
Implements IComparer
Private m_ColumnNumber As Integer
Private m_SortOrder As SortOrder
Public Sub New(ByVal column_number As Integer, ByVal sort_order As SortOrder)
m_ColumnNumber = column_number
m_SortOrder = sort_order
End Sub
Public Function Compare(ByVal x As Object, ByVal y As Object) _
As Integer Implements System.Collections.IComparer.Compare
Dim item_x As ListViewItem = DirectCast(x, ListViewItem)
Dim item_y As ListViewItem = DirectCast(y, ListViewItem)
' Get the sub-item values.
Dim string_x As String
If item_x.SubItems.Count <= m_ColumnNumber Then
string_x = ""
Else
string_x = item_x.SubItems(m_ColumnNumber).Text
End If
Dim string_y As String
If item_y.SubItems.Count <= m_ColumnNumber Then
string_y = ""
Else
string_y = item_y.SubItems(m_ColumnNumber).Text
End If
' Compare them.
If m_SortOrder = SortOrder.Ascending Then
Return String.Compare(string_x, string_y)
Else
Return String.Compare(string_y, string_x)
End If
End Function
End Class
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
Inherits System.Windows.Forms.Form
'Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing AndAlso components IsNot Nothing Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.components = New System.ComponentModel.Container
'Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(Form1))
'Me.imlLarge = New System.Windows.Forms.ImageList(Me.components)
Me.MenuStrip1 = New System.Windows.Forms.MenuStrip
Me.ViewToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
Me.mnuViewDetails = New System.Windows.Forms.ToolStripMenuItem
Me.mnuViewLargeIcons = New System.Windows.Forms.ToolStripMenuItem
Me.mnuViewList = New System.Windows.Forms.ToolStripMenuItem
Me.mnuViewSmallIcons = New System.Windows.Forms.ToolStripMenuItem
Me.mnuViewTile = New System.Windows.Forms.ToolStripMenuItem
'Me.imlSmall = New System.Windows.Forms.ImageList(Me.components)
Me.lvwStudents = New System.Windows.Forms.ListView
Me.ColumnHeader3 = New System.Windows.Forms.ColumnHeader
Me.ColumnHeader2 = New System.Windows.Forms.ColumnHeader
Me.ColumnHeader1 = New System.Windows.Forms.ColumnHeader
Me.MenuStrip1.SuspendLayout()
Me.SuspendLayout()
'
'imlLarge
'
'Me.imlLarge.ImageStream = CType(resources.GetObject("imlLarge.ImageStream"), System.Windows.Forms.ImageListStreamer)
'Me.imlLarge.Images.SetKeyName(0, "large_book.bmp")
'
'MenuStrip1
'
Me.MenuStrip1.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.ViewToolStripMenuItem})
Me.MenuStrip1.Location = New System.Drawing.Point(0, 0)
Me.MenuStrip1.Name = "MenuStrip1"
Me.MenuStrip1.Size = New System.Drawing.Size(772, 24)
Me.MenuStrip1.TabIndex = 1
Me.MenuStrip1.Text = "MenuStrip1"
'
'ViewToolStripMenuItem
'
Me.ViewToolStripMenuItem.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuViewDetails, Me.mnuViewLargeIcons, Me.mnuViewList, Me.mnuViewSmallIcons, Me.mnuViewTile})
Me.ViewToolStripMenuItem.Name = "ViewToolStripMenuItem"
Me.ViewToolStripMenuItem.Text = "&View"
'
'mnuViewDetails
'
Me.mnuViewDetails.Name = "mnuViewDetails"
Me.mnuViewDetails.Text = "&Details"
'
'mnuViewLargeIcons
'
Me.mnuViewLargeIcons.Name = "mnuViewLargeIcons"
Me.mnuViewLargeIcons.Text = "Large Icons"
'
'mnuViewList
'
Me.mnuViewList.Name = "mnuViewList"
Me.mnuViewList.Text = "&List"
'
'mnuViewSmallIcons
'
Me.mnuViewSmallIcons.Name = "mnuViewSmallIcons"
Me.mnuViewSmallIcons.Text = "&Small Icons"
'
'mnuViewTile
'
Me.mnuViewTile.Name = "mnuViewTile"
Me.mnuViewTile.Text = "Tile"
'
'imlSmall
'
'Me.imlSmall.ImageStream = CType(resources.GetObject("imlSmall.ImageStream"), System.Windows.Forms.ImageListStreamer)
'Me.imlSmall.Images.SetKeyName(0, "small_book.bmp")
'
'lvwStudents
'
Me.lvwStudents.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.ColumnHeader1, Me.ColumnHeader2, Me.ColumnHeader3})
Me.lvwStudents.Dock = System.Windows.Forms.DockStyle.Fill
'Me.lvwStudents.LargeImageList = Me.imlLarge
Me.lvwStudents.Location = New System.Drawing.Point(0, 24)
Me.lvwStudents.Name = "lvwStudents"
Me.lvwStudents.Size = New System.Drawing.Size(772, 249)
'Me.lvwStudents.SmallImageList = Me.imlSmall
Me.lvwStudents.TabIndex = 2
Me.lvwStudents.View = System.Windows.Forms.View.Details
'
'ColumnHeader2
'
Me.ColumnHeader2.Text = "URL"
'
'ColumnHeader1
'
Me.ColumnHeader1.Text = "Title"
'
'Form1
'
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(772, 273)
Me.Controls.Add(Me.lvwStudents)
Me.Controls.Add(Me.MenuStrip1)
Me.Name = "Form1"
Me.Text = "ListViewCustomSort"
Me.MenuStrip1.ResumeLayout(False)
Me.ResumeLayout(False)
Me.PerformLayout()
End Sub
' Friend WithEvents imlLarge As System.Windows.Forms.ImageList
Friend WithEvents MenuStrip1 As System.Windows.Forms.MenuStrip
Friend WithEvents ViewToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
Friend WithEvents mnuViewDetails As System.Windows.Forms.ToolStripMenuItem
Friend WithEvents mnuViewLargeIcons As System.Windows.Forms.ToolStripMenuItem
Friend WithEvents mnuViewList As System.Windows.Forms.ToolStripMenuItem
Friend WithEvents mnuViewSmallIcons As System.Windows.Forms.ToolStripMenuItem
Friend WithEvents mnuViewTile As System.Windows.Forms.ToolStripMenuItem
' Friend WithEvents imlSmall As System.Windows.Forms.ImageList
Friend WithEvents lvwStudents As System.Windows.Forms.ListView
Friend WithEvents ColumnHeader3 As System.Windows.Forms.ColumnHeader
Friend WithEvents ColumnHeader2 As System.Windows.Forms.ColumnHeader
Friend WithEvents ColumnHeader1 As System.Windows.Forms.ColumnHeader
End Class
Related examples in the same category
