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Using Serialization to Persist TreeView Control (VB.NET)

, 27 Oct 2004 CPOL
Utilising serialization to persist TreeView control hierarchy.
treeviewdataaccess_demo.zip
TreeViewDataAccess_demo
treeviewdataaccess_src.zip
TreeViewDataAccess
Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        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.
    Friend WithEvents TreeView1 As System.Windows.Forms.TreeView
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents SaveButton As System.Windows.Forms.Button
    Friend WithEvents LoadButton As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.TreeView1 = New System.Windows.Forms.TreeView
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.SaveButton = New System.Windows.Forms.Button
        Me.LoadButton = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'TreeView1
        '
        Me.TreeView1.CheckBoxes = True
        Me.TreeView1.ImageIndex = -1
        Me.TreeView1.Location = New System.Drawing.Point(8, 8)
        Me.TreeView1.Name = "TreeView1"
        Me.TreeView1.SelectedImageIndex = -1
        Me.TreeView1.Size = New System.Drawing.Size(344, 264)
        Me.TreeView1.TabIndex = 0
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(8, 280)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Add"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(96, 280)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "Clear"
        '
        'SaveButton
        '
        Me.SaveButton.Location = New System.Drawing.Point(184, 280)
        Me.SaveButton.Name = "SaveButton"
        Me.SaveButton.TabIndex = 3
        Me.SaveButton.Text = "Save"
        '
        'LoadButton
        '
        Me.LoadButton.Location = New System.Drawing.Point(280, 280)
        Me.LoadButton.Name = "LoadButton"
        Me.LoadButton.TabIndex = 4
        Me.LoadButton.Text = "Load"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(360, 310)
        Me.Controls.Add(Me.LoadButton)
        Me.Controls.Add(Me.SaveButton)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TreeView1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        If TreeView1.SelectedNode Is Nothing Then
            TreeView1.Nodes.Add(New TreeNode("New Node", 1, 2))
        Else
            TreeView1.SelectedNode.Nodes.Add(New TreeNode("New Node", 1, 2))
            TreeView1.SelectedNode.Expand()
        End If

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        TreeView1.Nodes.Clear()

    End Sub

    Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveButton.Click

        TreeViewDataAccess.SaveTreeViewData(TreeView1, "C:\Temp\TreeView.xml")

    End Sub

    Private Sub LoadButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LoadButton.Click

        TreeViewDataAccess.LoadTreeViewData(TreeView1, "C:\Temp\TreeView.xml")

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        TreeView1.Tag = New TreeViewDataAccess.TreeNodeData(New TreeNode("Test", 1, 2))
    End Sub
End Class

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Tom John
Software Developer (Senior) RedFrog.com Limited
United Kingdom United Kingdom
No Biography provided

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Web01 | 2.8.150506.1 | Last Updated 27 Oct 2004
Article Copyright 2004 by Tom John
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