Drag and drop ListBox : ListBox Drag Drop « GUI « VB.Net Tutorial

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VB.Net Tutorial » GUI » ListBox Drag Drop 
14.82.1.Drag and drop ListBox
Drag and drop ListBox
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class ListBoxDragDrop
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class


Public Class Form1
    Private dragBounds As Rectangle
    Private dragMethod As String

    Private Sub ListBox1_DragEnter(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.DragEventArgs_
          Handles ListBox1.DragEnter
        ' ----- Yes, we accept the items.
        If (e.Data.GetDataPresent(ListBox2.SelectedItems. _
              GetType()) = TrueThen _
           e.Effect = DragDropEffects.Move
    End Sub

    Private Sub ListBox1_DragDrop(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.DragEventArgs_
          Handles ListBox1.DragDrop
        ' ----- Accept the dropped items.
        For Each oneItem As Object In _
              e.Data.GetData(ListBox2.SelectedItems.GetType())
            ListBox1.Items.Add(oneItem)
        Next oneItem
    End Sub

    Private Sub ListBox1_MouseDown(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.MouseEventArgs_
          Handles ListBox1.MouseDown, ListBox2.MouseDown
        ' ----- Prepare the draggable content.
        If (CType(sender, ListBox).SelectedItems.Count = 0Then Return

        ' ----- Don't start the drag yet. Wait until we move a
        '       certain amount.
        dragBounds = New Rectangle(New Point(e.X - _
           (SystemInformation.DragSize.Width / 2), _
           e.Y - (SystemInformation.DragSize.Height / 2)), _
           SystemInformation.DragSize)
        If (sender Is ListBox1Then
            dragMethod = "1to2"
        Else
            dragMethod = "2to1"
        End If
    End Sub

    Private Sub ListBox1_MouseMove(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.MouseEventArgs_
          Handles ListBox1.MouseMove
        ' ----- Ignore if not dragging from ListBox1.
        If (dragMethod <> "1to2"Then Return

        ' ----- Have we left the drag boundary?
        If (dragBounds.Contains(e.X, e.Y= FalseThen
            ' ----- Start the drag-and-drop operation.
            If (ListBox1.DoDragDrop(ListBox1.SelectedItems, _
                  DragDropEffects.Move= _
                  DragDropEffects.MoveThen
                ' ----- Successful move. Remove the items from
                '       this list.
                Do While ListBox1.SelectedItems.Count > 0
                    ListBox1.Items.Remove(ListBox1.SelectedItems(0))
                Loop
            End If
            dragMethod = ""
        End If
    End Sub

    Private Sub ListBox1_MouseUp(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.MouseEventArgs_
          Handles ListBox1.MouseUp, ListBox2.MouseUp
        ' ----- End of drag-and-drop.
        dragMethod = ""
    End Sub

    Private Sub ListBox2_DragEnter(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.DragEventArgs_
          Handles ListBox2.DragEnter
        ' ----- Yes, we accept the items.
        If (e.Data.GetDataPresent(ListBox1.SelectedItems. _
           GetType()) = TrueThen _
           e.Effect = DragDropEffects.Move
    End Sub

    Private Sub ListBox2_DragDrop(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.DragEventArgs_
          Handles ListBox2.DragDrop
        ' ----- Accept the dropped items.
        For Each oneItem As Object In _
              e.Data.GetData(ListBox1.SelectedItems.GetType())
            ListBox2.Items.Add(oneItem)
        Next oneItem
    End Sub

    Private Sub ListBox2_MouseMove(ByVal sender As Object, _
          ByVal e As System.Windows.Forms.MouseEventArgs_
          Handles ListBox2.MouseMove
        ' ----- Ignore if not dragging from ListBox2.
        If (dragMethod <> "2to1"Then Return

        ' ----- Have we left the drag boundary?
        If (dragBounds.Contains(e.X, e.Y= FalseThen
            ' ----- Start the drag-and-drop operation.
            If (ListBox2.DoDragDrop(ListBox2.SelectedItems, _
                  DragDropEffects.Move= _
                  DragDropEffects.MoveThen
                ' ----- Successful move. Remove the items from
                '       this list.
                Do While ListBox2.SelectedItems.Count > 0
                    ListBox2.Items.Remove(ListBox2.SelectedItems(0))
                Loop
            End If
            dragMethod = ""
        End If
    End Sub
End Class


<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected 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.ListBox1 = New System.Windows.Forms.ListBox
        Me.ListBox2 = New System.Windows.Forms.ListBox
        Me.SuspendLayout()
        '
        'ListBox1
        '
        Me.ListBox1.AllowDrop = True
        Me.ListBox1.FormattingEnabled = True
        Me.ListBox1.Items.AddRange(New Object() {"One""Two""Three""Four""Five""Six"})
        Me.ListBox1.Location = New System.Drawing.Point(88)
        Me.ListBox1.Name = "ListBox1"
        Me.ListBox1.SelectionMode = System.Windows.Forms.SelectionMode.MultiExtended
        Me.ListBox1.Size = New System.Drawing.Size(19295)
        Me.ListBox1.TabIndex = 0
        '
        'ListBox2
        '
        Me.ListBox2.AllowDrop = True
        Me.ListBox2.FormattingEnabled = True
        Me.ListBox2.Location = New System.Drawing.Point(2088)
        Me.ListBox2.Name = "ListBox2"
        Me.ListBox2.SelectionMode = System.Windows.Forms.SelectionMode.MultiExtended
        Me.ListBox2.Size = New System.Drawing.Size(19295)
        Me.ListBox2.TabIndex = 1
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(408112)
        Me.Controls.Add(Me.ListBox2)
        Me.Controls.Add(Me.ListBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "ListBox Drag-and-Drop"
        Me.ResumeLayout(False)

    End Sub
    Friend WithEvents ListBox1 As System.Windows.Forms.ListBox
    Friend WithEvents ListBox2 As System.Windows.Forms.ListBox

End Class
14.82.ListBox Drag Drop
14.82.1.Drag and drop ListBoxDrag and drop ListBox
14.82.2.Drag file from File Explore to ListBoxDrag file from File Explore to ListBox
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