Create control in a separate thread : GUI Thread « GUI « VB.Net Tutorial





Create control in a separate thread
Imports System.Threading

Imports System.Windows.Forms

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

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 Button1 As System.Windows.Forms.Button
  Friend WithEvents Label1 As System.Windows.Forms.Label
  <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(8, 8)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(64, 32)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "Test"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(8, 64)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(272, 176)
        Me.Label1.TabIndex = 1
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label1, Me.Button1})
        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
    Dim t1 As New Thread(AddressOf makecontrol)
    t1.Start()     
    makecontrol()  
  End Sub

  Private Sub makecontrol()
    Dim x As New Button()
    x.Name = "btnNew"
    x.Visible = True
    Try
      Me.Controls.Add(x)
    Catch Ex As System.ArgumentException
      MessageBox.Show(Ex.Message)
    End Try
  End Sub
End Class










14.91.GUI Thread
14.91.1.Create control in a separate threadCreate control in a separate thread
14.91.2.Thread Sleeps in a button's actionThread Sleeps in a button's action
14.91.3.Demonstrates using threads in a GUI