VB.Net Tutorial/GUI/Drag Drop
Copy and paste Object
<source lang="vbnet">" Requires a reference to System.Xml. Imports System.Xml.Serialization Imports System.IO Imports System.Windows.Forms public class CopyPasteEmployee
public Shared Sub Main Application.Run(New Form1) End Sub
End class
Public Class Form1
<Serializable()> _ Public Class Employee Public FirstName As String Public LastName As String Public Sub New() End Sub Public Sub New(ByVal first_name As String, ByVal last_name As String) FirstName = first_name LastName = last_name End Sub End Class " Copy the Employee to the clipboard. Private Sub btnCopy_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCopy.Click Dim emp As New Employee(txtFirstName.Text, txtLastName.Text) Dim data_object As New DataObject data_object.SetData("Employee", emp) Clipboard.SetDataObject(data_object) End Sub " Paste data from the clipboard. Private Sub btnPaste_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPaste.Click Dim data_object As IDataObject = Clipboard.GetDataObject() If data_object.GetDataPresent("Employee") Then Dim emp As Employee = DirectCast(data_object.GetData("Employee"), Employee) txtPasteFirstName.Text = emp.FirstName txtPasteLastName.Text = emp.LastName End If End Sub
End Class <Global.Microsoft.VisualBasic.rupilerServices.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.ruponentModel.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.btnPaste = New System.Windows.Forms.Button Me.txtPasteLastName = New System.Windows.Forms.TextBox Me.txtPasteFirstName = New System.Windows.Forms.TextBox Me.Label3 = New System.Windows.Forms.Label Me.Label4 = New System.Windows.Forms.Label Me.btnCopy = New System.Windows.Forms.Button Me.txtLastName = New System.Windows.Forms.TextBox Me.txtFirstName = New System.Windows.Forms.TextBox Me.Label2 = New System.Windows.Forms.Label Me.Label1 = New System.Windows.Forms.Label Me.SuspendLayout() " "btnPaste " Me.btnPaste.Location = New System.Drawing.Point(232, 96) Me.btnPaste.Name = "btnPaste" Me.btnPaste.Size = New System.Drawing.Size(48, 24) Me.btnPaste.TabIndex = 22 Me.btnPaste.Text = "Paste" " "txtPasteLastName " Me.txtPasteLastName.Location = New System.Drawing.Point(72, 112) Me.txtPasteLastName.Name = "txtPasteLastName" Me.txtPasteLastName.Size = New System.Drawing.Size(136, 20) Me.txtPasteLastName.TabIndex = 21 " "txtPasteFirstName " Me.txtPasteFirstName.Location = New System.Drawing.Point(72, 88) Me.txtPasteFirstName.Name = "txtPasteFirstName" Me.txtPasteFirstName.Size = New System.Drawing.Size(136, 20) Me.txtPasteFirstName.TabIndex = 20 " "Label3 " Me.Label3.AutoSize = True Me.Label3.Location = New System.Drawing.Point(8, 112) Me.Label3.Name = "Label3" Me.Label3.Size = New System.Drawing.Size(54, 13) Me.Label3.TabIndex = 19 Me.Label3.Text = "Last Name" " "Label4 " Me.Label4.AutoSize = True Me.Label4.Location = New System.Drawing.Point(8, 88) Me.Label4.Name = "Label4" Me.Label4.Size = New System.Drawing.Size(53, 13) Me.Label4.TabIndex = 18 Me.Label4.Text = "First Name" " "btnCopy " Me.btnCopy.Location = New System.Drawing.Point(232, 16) Me.btnCopy.Name = "btnCopy" Me.btnCopy.Size = New System.Drawing.Size(48, 24) Me.btnCopy.TabIndex = 17 Me.btnCopy.Text = "Copy" " "txtLastName " Me.txtLastName.Location = New System.Drawing.Point(72, 32) Me.txtLastName.Name = "txtLastName" Me.txtLastName.Size = New System.Drawing.Size(136, 20) Me.txtLastName.TabIndex = 16 Me.txtLastName.Text = "AAAAAA" " "txtFirstName " Me.txtFirstName.Location = New System.Drawing.Point(72, 8) Me.txtFirstName.Name = "txtFirstName" Me.txtFirstName.Size = New System.Drawing.Size(136, 20) Me.txtFirstName.TabIndex = 15 Me.txtFirstName.Text = "BBBBB" " "Label2 " Me.Label2.AutoSize = True Me.Label2.Location = New System.Drawing.Point(8, 32) Me.Label2.Name = "Label2" Me.Label2.Size = New System.Drawing.Size(54, 13) Me.Label2.TabIndex = 14 Me.Label2.Text = "Last Name" " "Label1 " Me.Label1.AutoSize = True Me.Label1.Location = New System.Drawing.Point(8, 8) Me.Label1.Name = "Label1" Me.Label1.Size = New System.Drawing.Size(53, 13) Me.Label1.TabIndex = 13 Me.Label1.Text = "First Name" " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(288, 139) Me.Controls.Add(Me.btnPaste) Me.Controls.Add(Me.txtPasteLastName) Me.Controls.Add(Me.txtPasteFirstName) Me.Controls.Add(Me.Label3) Me.Controls.Add(Me.Label4) Me.Controls.Add(Me.btnCopy) Me.Controls.Add(Me.txtLastName) Me.Controls.Add(Me.txtFirstName) Me.Controls.Add(Me.Label2) Me.Controls.Add(Me.Label1) Me.Name = "Form1" Me.Text = "CopyPasteEmployee" Me.ResumeLayout(False) Me.PerformLayout() End Sub Friend WithEvents btnPaste As System.Windows.Forms.Button Friend WithEvents txtPasteLastName As System.Windows.Forms.TextBox Friend WithEvents txtPasteFirstName As System.Windows.Forms.TextBox Friend WithEvents Label3 As System.Windows.Forms.Label Friend WithEvents Label4 As System.Windows.Forms.Label Friend WithEvents btnCopy As System.Windows.Forms.Button Friend WithEvents txtLastName As System.Windows.Forms.TextBox Friend WithEvents txtFirstName As System.Windows.Forms.TextBox Friend WithEvents Label2 As System.Windows.Forms.Label Friend WithEvents Label1 As System.Windows.Forms.Label
End Class</source>
Drop a file
<source lang="vbnet">Imports System.Data Imports System.Data.OleDb Imports System.Windows.Forms public class FileDrop
public Shared Sub Main Application.Run(New Form1) End Sub
End class Public Class Form1
" Allow Copy if there is FileDrop data. Private Sub lblDropTarget_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles lblDropTarget.DragEnter If e.Data.GetDataPresent(DataFormats.FileDrop) Then e.Effect = DragDropEffects.Copy Else e.Effect = DragDropEffects.None End If End Sub " Display the dropped file names. Private Sub lblDropTarget_DragDrop(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles lblDropTarget.DragDrop lstFiles.Items.Clear() Dim file_names As String() = DirectCast(e.Data.GetData(DataFormats.FileDrop), String()) For Each file_name As String In file_names lstFiles.Items.Add(file_name) Next file_name End Sub
End Class <Global.Microsoft.VisualBasic.rupilerServices.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.ruponentModel.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.lstFiles = New System.Windows.Forms.ListBox Me.lblDropTarget = New System.Windows.Forms.Label Me.SuspendLayout() " "lstFiles " Me.lstFiles.Dock = System.Windows.Forms.DockStyle.Fill Me.lstFiles.FormattingEnabled = True Me.lstFiles.Location = New System.Drawing.Point(0, 48) Me.lstFiles.Name = "lstFiles" Me.lstFiles.Size = New System.Drawing.Size(274, 160) Me.lstFiles.TabIndex = 3 " "lblDropTarget " Me.lblDropTarget.AllowDrop = True Me.lblDropTarget.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D Me.lblDropTarget.Dock = System.Windows.Forms.DockStyle.Top Me.lblDropTarget.Location = New System.Drawing.Point(0, 0) Me.lblDropTarget.Name = "lblDropTarget" Me.lblDropTarget.Size = New System.Drawing.Size(274, 48) Me.lblDropTarget.TabIndex = 2 Me.lblDropTarget.Text = "Drop Target" Me.lblDropTarget.TextAlign = System.Drawing.ContentAlignment.MiddleCenter " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(274, 210) Me.Controls.Add(Me.lstFiles) Me.Controls.Add(Me.lblDropTarget) Me.Name = "Form1" Me.Text = "AcceptFiles" Me.ResumeLayout(False) End Sub Friend WithEvents lstFiles As System.Windows.Forms.ListBox Friend WithEvents lblDropTarget As System.Windows.Forms.Label
End Class</source>