Updater

Imports System.Net
Public Class MainForm
    Private WithEvents httpClient As WebClient

    Dim DesktopPath As String = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory)
    Dim CurrentURL As String
    Dim FileName As String
    Dim FileFormat As String

    Private Sub DeletePermanently()
        My.Computer.FileSystem.DeleteFile(DesktopPath & "\" & FileName + FileFormat,
        Microsoft.VisualBasic.FileIO.RecycleOption.DeletePermanently,
        Microsoft.VisualBasic.FileIO.UICancelOption.DoNothing)
    End Sub

    Private Sub DownloadButton_Click(sender As Object, e As EventArgs) Handles DownloadButton.Click
        'CurrentURL = "URL.de/Download/ImageName.jpg" : FileName = "ImageName" : CurrentFormat = ".jpg"
        httpClient.DownloadFileAsync(New Uri(CurrentURL), DesktopPath & "\" & FileName + FileFormat)
        '= ...Desktop\ImageName.jpg
        'Download File with Format from URL
    End Sub

    Private Sub CancelButton_Click(sender As Object, e As EventArgs) Handles CancelButton.Click
        httpClient.CancelAsync() 'Cancel the Download
        DeletePermanently() 'Delete the faulty file.
    End Sub

    Private Sub httpClient_DownloadProgressChanged(sender As Object, e As DownloadProgressChangedEventArgs) _
    Handles httpClient.DownloadProgressChanged
        DownloadProgressBar.Value = e.ProgressPercentage
        Dim Bytes As Double = e.BytesReceived / 1000
        Dim TotalBytes As Double = e.TotalBytesToReceive / 1000
        StatusLabel.Text = _
        """" & FileName + FileFormat & """" & " is downloaded..." & vbNewLine & Bytes & " KB / " & TotalBytes & " KB"
        '= "ImageName.jpg" is downloaded... 300 KB / 900 KB
        End If
    End Sub

End Class

Imports System.Net
Public Class MainForm
    Private WithEvents httpClient As WebClient

    Dim DesktopPath As String = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory)
    Dim CurrentURL As String
    Dim FileName As String
    Dim FileFormat As String

    Private Sub DeletePermanently()
        My.Computer.FileSystem.DeleteFile(DesktopPath & "\" & FileName + FileFormat,
        Microsoft.VisualBasic.FileIO.RecycleOption.DeletePermanently,
        Microsoft.VisualBasic.FileIO.UICancelOption.DoNothing)
    End Sub

    Private Sub DownloadButton_Click(sender As Object, e As EventArgs) Handles DownloadButton.Click
        'CurrentURL = "URL.de/Download/ImageName.jpg" : FileName = "ImageName" : CurrentFormat = ".jpg"
        httpClient.DownloadFileAsync(New Uri(CurrentURL), DesktopPath & "\" & FileName + FileFormat)
        '= ...Desktop\ImageName.jpg
        'Download File with Format from URL
    End Sub

    Private Sub CancelButton_Click(sender As Object, e As EventArgs) Handles CancelButton.Click
        httpClient.CancelAsync() 'Cancel the Download
        DeletePermanently() 'Delete the faulty file.
    End Sub

    Private Sub httpClient_DownloadProgressChanged(sender As Object, e As DownloadProgressChangedEventArgs) _
    Handles httpClient.DownloadProgressChanged
        DownloadProgressBar.Value = e.ProgressPercentage
        Dim Bytes As Double = e.BytesReceived / 1000
        Dim TotalBytes As Double = e.TotalBytesToReceive / 1000
        StatusLabel.Text = _
        """" & FileName + FileFormat & """" & " is downloaded..." & vbNewLine & Bytes & " KB / " & TotalBytes & " KB"
        '= "ImageName.jpg" is downloaded... 300 KB / 900 KB
        End If
    End Sub

End Class

Imports System.Net
Imports System****

Public Class AutoUpdateClass
    Public Event UpdatePercent(ByVal nCompleted As Integer)
    Public Event DownloadComplete()
    Public Event Status(ByVal sStatus As String)

    Private sVersion As String

    Private VersionURL As String
    Private ApplicationURL As String
    Private PathOldFile As String

    Private _CurrentPath As CurrentPath
    Private Structure CurrentPath
        Dim Path As String
        Dim FileName As String
    End Structure

    Private _TempPath As TempPath
    Private Structure TempPath
        Dim Path As String
        Dim FileName As String
    End Structure

    Public Sub New(ByVal sVersionURL As String, _
                   ByVal sApplicationURL As String, _
                   ByVal sPathOldFile As String)

        VersionURL = sVersionURL
        ApplicationURL = sApplicationURL
        PathOldFile = sPathOldFile

        _CurrentPath.Path = Path.GetDirectoryName(sPathOldFile) & "\"
        _CurrentPath.FileName = Path.GetFileName(sPathOldFile)

    End Sub

    Public Sub Run()
        GetVersion(VersionURL)
    End Sub

    Private Sub GetApplication()
        If Not String.IsNullOrEmpty(sVersion) Then
            If sVersion <> Application.ProductVersion Then
                DownloadApplication(ApplicationURL)
            Else
                RaiseEvent Status("Version: " & Application.ProductVersion)
            End If
        Else
            'TODO: Error while downloading version, do what you want (You can also raise DownloadComplete event and manage it)
        End If
    End Sub

#Region "Get version number"
    Private Sub GetVersion(ByVal sVersionURL As String)
        RaiseEvent Status("Checking for an update...")
        Dim wc As New WebClient
        AddHandler wc.DownloadStringCompleted, AddressOf DownloadStringCompleted
        wc.DownloadStringAsync(New Uri(sVersionURL))
    End Sub

    Private Sub DownloadStringCompleted(ByVal sender As Object, ByVal e As DownloadStringCompletedEventArgs)
        If e.Cancelled = False AndAlso e.Error Is Nothing Then
            sVersion = e.Result
            GetApplication()
        Else

        End If
    End Sub
#End Region

#Region "Download updated exe"

    Private Sub DownloadApplication(ByVal sURL As String)
        RaiseEvent Status("Dowloading update...")
        Dim wc As New WebClient
        AddHandler wc.DownloadProgressChanged, AddressOf ProgressChanged
        AddHandler wc.DownloadFileCompleted, AddressOf DownloadCompleted
        _TempPath.Path = Path.GetTempPath
        _TempPath.FileName = _CurrentPath.FileName
        wc.DownloadFileAsync(New Uri(sURL), _TempPath.Path & _TempPath.FileName)
    End Sub

    Private Sub ProgressChanged(ByVal sender As Object, ByVal e As DownloadProgressChangedEventArgs)
        Dim bytesIn As Double = Double.Parse(e.BytesReceived.ToString())
        Dim totalBytes As Double = Double.Parse(e.TotalBytesToReceive.ToString())
        Dim percent As Double = bytesIn / totalBytes * 100
        RaiseEvent UpdatePercent(Int32.Parse(Math.Truncate(percent).ToString()))
    End Sub

    Private Sub DownloadCompleted(ByVal sender As Object, ByVal e As System.ComponentModel.AsyncCompletedEventArgs)
        If e.Error Is Nothing Then
            RaiseEvent Status("Update Finished")
            RaiseEvent DownloadComplete()
            GenerateAndRunCMD()
        Else
            'TODO: Error while downloading your new .exe, do what you want (You can also raise DownloadComplete event and manage it)
        End If
    End Sub

#End Region

    Private Sub GenerateAndRunCMD()
        Dim sCMDcommands As New System.Text.StringBuilder
        With sCMDcommands
            .Append("/C """)
            .Append("timeout /t 2 /nobreak > NUL && ")
            .Append("del """ & _CurrentPath.Path & _CurrentPath.FileName & """ && ")
            .Append("move /y """ & _TempPath.Path & _TempPath.FileName & """ """ & _CurrentPath.Path & """ && ")
            .Append(" start """" """ & _CurrentPath.Path & _CurrentPath.FileName & """""")
        End With

        Dim p As Process = New Process()
        Dim pi As ProcessStartInfo = New ProcessStartInfo()
        pi.Arguments = sCMDcommands.ToString
        pi.FileName = "cmd.exe"
        pi.UseShellExecute = False
        pi.CreateNoWindow = True
        p.StartInfo = pi
        p.Start()
        Application.Exit()
    End Sub

End Class

        Try
            AU = New AutoUpdateClass(URLversiontxt, URLUpdatedApplication, Application.ExecutablePath)
            AU.Run()
        Catch ex As Exception : End Try