Imports System.IO
Imports System.Net
Imports System.Threading.Tasks
Public Class SYS_UPDATE
    ReadOnly ds2 As New DataSet
    Private Sub Set_清單1()
        FDT_dgv.DataSource = Nothing : ds2.Clear()
        FDT_dgv.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.EnableResizing
        FDT_dgv.ColumnHeadersHeight = 25
        FDT_dgv.AllowUserToAddRows = False
        SQL_FTP資料夾路徑分配()
        da.Fill(ds2) : FDT_dgv.DataSource = ds2.Tables(0) : conn.Close()
    End Sub
    Private Sub SYS_UPDATE_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        資料數 = 5
        Target = "https://gcm-smart.com/ERP/BIFENG/"
    End Sub
    Private Async Sub SYS_UPDATE_Shown(sender As Object, e As EventArgs) Handles MyBase.Shown
        MyModule1.進度條() : Delay(30000)
        MyModule1.進度條() : Dim Str As String = Application.StartupPath
        MyModule1.進度條() : If File.Exists(Str + "\BIFENG-ERP-SYS.exe") Then : File.Delete(Str + "\BIFENG-ERP-SYS.exe") : End If
        Dim downloadUrl As String = Target & "BIFENG-ERP-SYS.exe"
        Dim savePath As String = Str + "\BIFENG-ERP-SYS.exe"
        ' 開始異步下載
        Await DownloadFileAsync(downloadUrl, savePath)
        MyModule1.進度條() : Shell(Str + "\BIFENG-ERP-SYS.exe", vbNormalFocus)
        Me.Close()
    End Sub
    Private WithEvents downloader As New WebClient()
    Private Async Function DownloadFileAsync(downloadUrl As String, savePath As String) As Task
        Try
            ' 使用異步方式下載檔案
            Await downloader.DownloadFileTaskAsync(New Uri(downloadUrl), savePath)
            ' 下載完成後的處理
            MessageBox.Show("下載完成！")
        Catch ex As Exception
            MessageBox.Show($"下載失敗: {ex.Message}")
        End Try
    End Function
    Public Sub Delay(ByRef Interval As Double)  'Interval单位为毫秒
        Dim time As DateTime = DateTime.Now
        Dim Span As Double = Interval * 1234
        While ((DateTime.Now.Ticks - time.Ticks) < Span)
            Application.DoEvents()
        End While
    End Sub
End Class