Download fichiers avec VB.net

Version imprimable

Bonsoir à tous,
Je suis en train de créer sous vb.net un programme pour télécharger des fichiers. J'ai créer un backgroundworker pour chaque téléchargement. Mon bouton Download lance download1 et download2
Je voudrais que backgroundworker1 une fois fini retourne dans Download1 et idem pour backgroundworker2.
J'ai essayé de mettre download1 à la fin de BackgroundWorker1_DoWork mais le programme me dit que la tâche est occupée.
J'ai essayé en mettant un timer avec ceci:

Code:

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            While BackgroundWorker1.IsBusy
                Application.DoEvents()
            End While
            Download1()

mais le programme plante si je ferme la fenêtre et ce n'est pas convaincant...
J'espère que j'ai été assez clair dans mes explications..
Voici mon code:

Code:

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Imports System.Net
Imports SimpleDownloadFile
Public Class Form1
    Dim Repertoire, Identifiant, Password, FichierIni As String
    Dim Url1, Url2, Url3, Url4, Url5 As String
    Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpString As String, ByVal lpFileName As String) As Integer
    Public Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As System.Text.StringBuilder, ByVal nSize As Integer, ByVal lpFileName As String) As Integer
    Delegate Sub ChangeTextsSafe(ByVal length As Long, ByVal position As Integer, ByVal percent As Integer)
    Delegate Sub DownloadCompleteSafe(ByVal cancelled As Boolean)
    Function EcrireINI(ByVal entete As String, ByVal variable As String, ByVal valeur As String, ByVal fichier As String)
        On Error Resume Next
        valeur = Trim(valeur)
        WritePrivateProfileString(entete, variable, valeur, fichier)
    End Function
    Function LireINI(ByVal Entete As String, ByVal Variable As String, ByVal Ini As String) As String
        Dim Deff As String = ""
        Try
            Dim StrBuild As New System.Text.StringBuilder(90)
            Dim Ret As Integer = GetPrivateProfileString(Entete, Variable, Deff, StrBuild, 90, Ini)
            Return Trim(StrBuild.ToString)
        Catch
            Return Trim(Deff)
        End Try
    End Function
    Sub AfficherMasquerDownload(ByVal Download As Integer, ByVal Afficher As Integer)
        Select Case Download
            Case 1
                Select Case Afficher
                    Case 0
                        TexteUrl1.Visible = False
                        TexteSize1.Visible = False
                        Size1.Visible = False
                        Index1.Visible = False
                        TexteDownload1.Visible = False
                        Down1.Visible = False
                        Pourcentage1.Visible = False
                        ProgressBar1.Visible = False
                    Case 1
                        TexteUrl1.Visible = True
                        TexteSize1.Visible = True
                        Size1.Visible = True
                        Index1.Visible = True
                        TexteDownload1.Visible = True
                        Down1.Visible = True
                        Pourcentage1.Visible = True
                        ProgressBar1.Visible = True
                End Select
            Case 2
                Select Case Afficher
                    Case 0
                        TexteUrl2.Visible = False
                        TexteSize2.Visible = False
                        Size2.Visible = False
                        Index2.Visible = False
                        TexteDownload2.Visible = False
                        Down2.Visible = False
                        Pourcentage2.Visible = False
                        ProgressBar2.Visible = False
                    Case 1
                        TexteUrl2.Visible = True
                        TexteSize2.Visible = True
                        Size2.Visible = True
                        Index2.Visible = True
                        TexteDownload2.Visible = True
                        Down2.Visible = True
                        Pourcentage2.Visible = True
                        ProgressBar2.Visible = True
                End Select
        End Select
    End Sub
    Private Sub Download1()
        Dim Absent As Boolean
        Dim Fichier As String = Nothing
        Dim Rep As String = Nothing
        For Compte = 0 To ListView1.Items.Count - 1
            Url1 = ListView1.Items(Compte).Text
            If Url1 <> Url2 And Url1 <> Url3 And Url1 <> Url4 And Url1 <> Url5 Then
                Dim pos As Integer = Url1.LastIndexOf("/")
                Dim T = LireINI("Menu", Str(Compte + 1), FichierIni)
                Dim W As String = T.Substring(Len(T) - 2)
                If W = "*1" Then
                    Absent = False
                Else
                    Absent = True
                    AfficherMasquerDownload(1, 1) '<=Modifier
                    ListView1.Items(Compte).ForeColor = Color.Red '<=Modifier
                    ListView1.Items(Compte).BackColor = Color.Yellow '<=Modifier
                    Index1.Text = Compte '<=Modifier(Label Index)
                    Exit For
                End If
            End If
        Next
        If Absent = True Then
            TexteUrl1.Text = Url1
            Rep = TexteUrl1.Text.Substring(7)
            Rep = Repertoire & Microsoft.VisualBasic.Left(Rep, Rep.LastIndexOf("/")) & "\"
            System.IO.Directory.CreateDirectory(Rep)
            Fichier = TexteUrl1.Text.Substring(TexteUrl1.Text.LastIndexOf("/") + 1)
            BackgroundWorker1.RunWorkerAsync(New Object() {Rep & Fichier})
        End If
    End Sub
    Private Sub BackgroundWorker1_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        Dim Fichier As String = e.Argument(0)
        Dim theResponse As HttpWebResponse
        Dim theRequest As HttpWebRequest
        Dim Credit As NetworkCredential = New NetworkCredential(Identifiant, Password)
        Try 'Checks if the file exist
            ' theRequest.Credentials = Credit
            theRequest = WebRequest.Create(TexteUrl1.Text)
            theResponse = theRequest.GetResponse
        Catch ex As Exception
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete1)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End Try
        Dim length As Integer = theResponse.ContentLength 'Size of the response (in bytes)
        Dim safedelegate As New ChangeTextsSafe(AddressOf ProgressDownload1)
        Me.Invoke(safedelegate, length, 0, 0) 'Invoke the TreadsafeDelegate
        Dim writeStream As New IO.FileStream(Fichier, IO.FileMode.Create)
        Dim nRead As Integer
        Dim readings As Integer = 0
        Do
            If BackgroundWorker1.CancellationPending Then 'If user abort download
                Exit Do
            End If
            Dim readBytes(4095) As Byte
            Dim bytesread As Short = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
            nRead += bytesread
            Dim percent As Integer = CInt(((nRead / 1024) * 100) / (length / 1024))
            Me.Invoke(safedelegate, length, nRead, percent)
            If bytesread = 0 Then Exit Do
            writeStream.Write(readBytes, 0, bytesread)
            readings += 1
        Loop
        theResponse.GetResponseStream.Close()
        writeStream.Close()
        If Me.BackgroundWorker1.CancellationPending Then
            IO.File.Delete(Fichier)
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete1)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End If
        Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete1)
        Me.Invoke(completeDelegate, False)
    End Sub
    Public Sub ProgressDownload1(ByVal length As Integer, ByVal position As Integer, ByVal percent As Integer)
        Size1.Text = Math.Round((length / 1024 / 1024), 2) & " MO"
        Down1.Text = Math.Round((position / 1024 / 1024), 2) & " MO"
        Me.ProgressBar1.Value = percent
        Pourcentage1.Text = percent & " %"
    End Sub
    Public Sub DownloadComplete1(ByVal cancelled As Boolean)
        TexteUrl1.Text = ""
        Down1.Text = ""
        Pourcentage1.Text = ""
        ProgressBar1.Value = 0
        Dim Index As Integer = Val(Index1.Text) + 1
        If cancelled = False Then : EcrireINI("Menu", Str(Index), LireINI("Menu", Str(Index), FichierIni) & "*1", FichierIni) : End If
        ListView1.Items(Index - 1).ForeColor = Color.Lime '<=Modifier
        ListView1.Items(Index - 1).BackColor = Color.Teal '<=Modifier
        Dim a As Integer = Val(Label2.Text) + 1
        Label2.Text = a
        AfficherMasquerDownload(1, 0)
    End Sub
    Private Sub Download2()
        Dim Absent As Boolean
        Dim Fichier As String = Nothing
        Dim Rep As String = Nothing
        For Compte = 0 To ListView1.Items.Count - 1
            Url2 = ListView1.Items(Compte).Text
            If Url2 <> Url1 And Url2 <> Url3 And Url2 <> Url4 And Url2 <> Url5 Then
                Dim pos As Integer = Url1.LastIndexOf("/")
                Dim T = LireINI("Menu", Str(Compte + 1), FichierIni)
                Dim W As String = T.Substring(Len(T) - 2)
                If W = "*1" Then
                    Absent = False
                Else
                    Absent = True
                    AfficherMasquerDownload(2, 1) '<=Modifier
                    ListView1.Items(Compte).ForeColor = Color.Red '<=Modifier
                    ListView1.Items(Compte).BackColor = Color.Yellow '<=Modifier
                    Index2.Text = Compte '<=Modifier(Label Index)
                    Exit For
                End If
            End If
        Next
        If Absent = True Then
            TexteUrl2.Text = Url2
            Rep = TexteUrl2.Text.Substring(7)
            Rep = Repertoire & Microsoft.VisualBasic.Left(Rep, Rep.LastIndexOf("/")) & "\"
            System.IO.Directory.CreateDirectory(Rep)
            Fichier = TexteUrl2.Text.Substring(TexteUrl2.Text.LastIndexOf("/") + 1)
            BackgroundWorker2.RunWorkerAsync(New Object() {Rep & Fichier})
            While BackgroundWorker2.IsBusy
                Application.DoEvents()
            End While
            Download2()
        End If
    End Sub
    Private Sub BackgroundWorker2_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker2.DoWork
        Dim Fichier As String = e.Argument(0)
        Dim theResponse As HttpWebResponse
        Dim theRequest As HttpWebRequest
        Dim Credit As NetworkCredential = New NetworkCredential(Identifiant, Password)
        Try
            ' theRequest.Credentials = Credit
            theRequest = WebRequest.Create(TexteUrl1.Text)
            theResponse = theRequest.GetResponse
        Catch ex As Exception
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete2)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End Try
        Dim length As Integer = theResponse.ContentLength
        Dim safedelegate As New ChangeTextsSafe(AddressOf ProgressDownload2)
        Me.Invoke(safedelegate, length, 0, 0)
        Dim writeStream As New IO.FileStream(Fichier, IO.FileMode.Create)
        Dim nRead As Integer
        Dim readings As Integer = 0
        Do
            If BackgroundWorker2.CancellationPending Then
                Exit Do
            End If
            Dim readBytes(4095) As Byte
            Dim bytesread As Short = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
            nRead += bytesread
            Dim percent As Integer = CInt(((nRead / 1024) * 100) / (length / 1024))
            Me.Invoke(safedelegate, length, nRead, percent)
            If bytesread = 0 Then Exit Do
            writeStream.Write(readBytes, 0, bytesread)
            readings += 1
        Loop
        theResponse.GetResponseStream.Close()
        writeStream.Close()
        If Me.BackgroundWorker2.CancellationPending Then
            IO.File.Delete(Fichier)
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete2)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End If
        Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete2)
        Me.Invoke(completeDelegate, False)
    End Sub
    Public Sub ProgressDownload2(ByVal length As Integer, ByVal position As Integer, ByVal percent As Integer)
        Size2.Text = Math.Round((length / 1024 / 1024), 2) & " MO"
        Down2.Text = Math.Round((position / 1024 / 1024), 2) & " MO"
        ProgressBar2.Value = percent
        Pourcentage2.Text = percent & " %"
    End Sub
    Public Sub DownloadComplete2(ByVal cancelled As Boolean)
        TexteUrl2.Text = ""
        Down2.Text = ""
        Pourcentage2.Text = ""
        ProgressBar2.Value = 0
        Dim Index As Integer = Val(Index2.Text) + 1
        If cancelled = False Then : EcrireINI("Menu", Str(Index), LireINI("Menu", Str(Index), FichierIni) & "*1", FichierIni) : End If
        ListView1.Items(Index - 1).ForeColor = Color.Lime '<=Modifier
        ListView1.Items(Index - 1).BackColor = Color.Teal '<=Modifier
        Dim a As Integer = Val(Label2.Text) + 1
        Label2.Text = a
        AfficherMasquerDownload(2, 0)
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        AfficherMasquerDownload(1, 0)
        Dim MyFolderBrowser As New System.Windows.Forms.FolderBrowserDialog
        MyFolderBrowser.Description = "Selectionnez le répertoire de destination:"
        MyFolderBrowser.SelectedPath = "E:\"
        Dim dlgResult As DialogResult = MyFolderBrowser.ShowDialog()
        If dlgResult = Windows.Forms.DialogResult.OK Then
            Repertoire = MyFolderBrowser.SelectedPath + "\"
        End If
        FichierIni = Repertoire & "Fichiers.ini"
        Dim Nombre As Integer = Val(LireINI("Menu", "Nombre", FichierIni))
        Label3.Text = Nombre
        ListView1.Focus()
        Dim Url1 As String
        For Compte = 0 To Nombre - 1
            Url1 = LireINI("Menu", Str(Compte + 1), FichierIni)
            Dim pos As Integer = Url1.LastIndexOf("*")
            If Microsoft.VisualBasic.Right(Url1, 2) = "*1" Then
                If pos > 0 Then : Url1 = Microsoft.VisualBasic.Left(Url1, pos) : End If
                ListView1.Items.Add(Url1)
                Dim a As Integer = Val(Label2.Text) + 1
                Label2.Text = a
                ListView1.Items(Compte).Selected = True
                ListView1.Items(Compte).ForeColor = Color.Lime
            Else
                ListView1.Items.Add(Url1)
            End If
        Next
        If ListView1.Items.Count > 0 Then
            ListView1.MultiSelect = False
            ListView1.Items(0).Focused = True
            ListView1.Items(0).Selected = True
        End If
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Download1()
        Download2()
    End Sub
End Class

Merci à vous tous de bien vouloir m'éclairer...

25/01/2013, 20h33
Pol63

le backgroundworker a un évènement levé à la fin du traitement

Qu'es-ce que tu entends par là? Je ne te suis pas...
Je viens de modifier mon code avec un timer. Ce que je ne comprends pas, j'ai déclaré cinq téléchargements mais j'en ai que deux qui tourne en même temps. J'ai surement du faire une erreur.
Voici mon code:

Code:

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Imports System.Net
Imports SimpleDownloadFile
Public Class Form1
    Dim Repertoire, Identifiant, Password, FichierIni As String
    Dim Url1, Url2, Url3, Url4, Url5 As String
    Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpString As String, ByVal lpFileName As String) As Integer
    Public Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As System.Text.StringBuilder, ByVal nSize As Integer, ByVal lpFileName As String) As Integer
    Delegate Sub ChangeTextsSafe(ByVal length As Long, ByVal position As Integer, ByVal percent As Integer)
    Delegate Sub DownloadCompleteSafe(ByVal cancelled As Boolean)
    Function EcrireINI(ByVal entete As String, ByVal variable As String, ByVal valeur As String, ByVal fichier As String)
        On Error Resume Next
        valeur = Trim(valeur)
        WritePrivateProfileString(entete, variable, valeur, fichier)
    End Function
    Function LireINI(ByVal Entete As String, ByVal Variable As String, ByVal Ini As String) As String
        Dim Deff As String = ""
        Try
            Dim StrBuild As New System.Text.StringBuilder(90)
            Dim Ret As Integer = GetPrivateProfileString(Entete, Variable, Deff, StrBuild, 90, Ini)
            Return Trim(StrBuild.ToString)
        Catch
            Return Trim(Deff)
        End Try
    End Function
    Sub AfficherMasquerDownload(ByVal Download As Integer, ByVal Afficher As Integer)
        Select Case Download
            Case 1
                If Afficher = 0 Then : TexteUrl1.Visible = False : Else : TexteUrl1.Visible = True : End If
                If Afficher = 0 Then : TexteSize1.Visible = False : Else : TexteSize1.Visible = True : End If
                If Afficher = 0 Then : Size1.Visible = False : Else : Size1.Visible = True : End If
                If Afficher = 0 Then : Index1.Visible = False : Else : Index1.Visible = True : End If
                If Afficher = 0 Then : TexteDownload1.Visible = False : Else : TexteDownload1.Visible = True : End If
                If Afficher = 0 Then : Down1.Visible = False : Else : Down1.Visible = True : End If
                If Afficher = 0 Then : Pourcentage1.Visible = False : Else : Pourcentage1.Visible = True : End If
                If Afficher = 0 Then : ProgressBar1.Visible = False : Else : ProgressBar1.Visible = True : End If
            Case 2
                If Afficher = 0 Then : TexteUrl2.Visible = False : Else : TexteUrl2.Visible = True : End If
                If Afficher = 0 Then : TexteSize2.Visible = False : Else : TexteSize2.Visible = True : End If
                If Afficher = 0 Then : Size2.Visible = False : Else : Size2.Visible = True : End If
                If Afficher = 0 Then : Index2.Visible = False : Else : Index2.Visible = True : End If
                If Afficher = 0 Then : TexteDownload2.Visible = False : Else : TexteDownload2.Visible = True : End If
                If Afficher = 0 Then : Down2.Visible = False : Else : Down2.Visible = True : End If
                If Afficher = 0 Then : Pourcentage2.Visible = False : Else : Pourcentage2.Visible = True : End If
                If Afficher = 0 Then : ProgressBar2.Visible = False : Else : ProgressBar2.Visible = True : End If
            Case 3
                If Afficher = 0 Then : TexteUrl3.Visible = False : Else : TexteUrl3.Visible = True : End If
                If Afficher = 0 Then : TexteSize3.Visible = False : Else : TexteSize3.Visible = True : End If
                If Afficher = 0 Then : Size3.Visible = False : Else : Size3.Visible = True : End If
                If Afficher = 0 Then : Index3.Visible = False : Else : Index3.Visible = True : End If
                If Afficher = 0 Then : TexteDownload3.Visible = False : Else : TexteDownload3.Visible = True : End If
                If Afficher = 0 Then : Down3.Visible = False : Else : Down3.Visible = True : End If
                If Afficher = 0 Then : Pourcentage3.Visible = False : Else : Pourcentage3.Visible = True : End If
                If Afficher = 0 Then : ProgressBar3.Visible = False : Else : ProgressBar3.Visible = True : End If
            Case 4
                If Afficher = 0 Then : TexteUrl4.Visible = False : Else : TexteUrl4.Visible = True : End If
                If Afficher = 0 Then : TexteSize4.Visible = False : Else : TexteSize4.Visible = True : End If
                If Afficher = 0 Then : Size4.Visible = False : Else : Size4.Visible = True : End If
                If Afficher = 0 Then : Index4.Visible = False : Else : Index4.Visible = True : End If
                If Afficher = 0 Then : TexteDownload4.Visible = False : Else : TexteDownload4.Visible = True : End If
                If Afficher = 0 Then : Down4.Visible = False : Else : Down4.Visible = True : End If
                If Afficher = 0 Then : Pourcentage4.Visible = False : Else : Pourcentage4.Visible = True : End If
                If Afficher = 0 Then : ProgressBar4.Visible = False : Else : ProgressBar4.Visible = True : End If
            Case 5
                If Afficher = 0 Then : TexteUrl5.Visible = False : Else : TexteUrl5.Visible = True : End If
                If Afficher = 0 Then : TexteSize5.Visible = False : Else : TexteSize5.Visible = True : End If
                If Afficher = 0 Then : Size5.Visible = False : Else : Size5.Visible = True : End If
                If Afficher = 0 Then : Index5.Visible = False : Else : Index5.Visible = True : End If
                If Afficher = 0 Then : TexteDownload5.Visible = False : Else : TexteDownload5.Visible = True : End If
                If Afficher = 0 Then : Down5.Visible = False : Else : Down5.Visible = True : End If
                If Afficher = 0 Then : Pourcentage5.Visible = False : Else : Pourcentage5.Visible = True : End If
                If Afficher = 0 Then : ProgressBar5.Visible = False : Else : ProgressBar5.Visible = True : End If
        End Select
    End Sub
    Private Sub Download1()
        Dim Absent As Boolean
        Dim Fichier As String = Nothing
        Dim Rep As String = Nothing
        Timer1.Stop()
        For Compte = 0 To ListView1.Items.Count - 1
            Url1 = ListView1.Items(Compte).Text
            If Url1 <> Url2 And Url1 <> Url3 And Url1 <> Url4 And Url1 <> Url5 Then
                Dim pos As Integer = Url1.LastIndexOf("/")
                Dim T = LireINI("Menu", Str(Compte + 1), FichierIni)
                Dim W As String = T.Substring(Len(T) - 2)
                If W = "*1" Then
                    Absent = False
                Else
                    Absent = True
                    AfficherMasquerDownload(1, 1) '<=Modifier
                    ListView1.Items(Compte).ForeColor = Color.Red '<=Modifier
                    ListView1.Items(Compte).BackColor = Color.Yellow '<=Modifier
                    Index1.Text = Compte '<=Modifier(Label Index)
                    Exit For
                End If
            End If
        Next
        If Absent = True Then
            Timer1.Start()
            TexteUrl1.Text = Url1
            Rep = TexteUrl1.Text.Substring(7)
            Rep = Repertoire & Microsoft.VisualBasic.Left(Rep, Rep.LastIndexOf("/")) & "\"
            System.IO.Directory.CreateDirectory(Rep)
            Fichier = TexteUrl1.Text.Substring(TexteUrl1.Text.LastIndexOf("/") + 1)
            BackgroundWorker1.RunWorkerAsync(New Object() {Rep & Fichier})
        End If
    End Sub
    Private Sub BackgroundWorker1_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        Dim Fichier As String = e.Argument(0)
        Dim theResponse As HttpWebResponse
        Dim theRequest As HttpWebRequest
        Dim Credit As NetworkCredential = New NetworkCredential(Identifiant, Password)
        Try 'Checks if the file exist
            ' theRequest.Credentials = Credit
            theRequest = WebRequest.Create(TexteUrl1.Text)
            theResponse = theRequest.GetResponse
        Catch ex As Exception
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete1)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End Try
        Dim length As Integer = theResponse.ContentLength 'Size of the response (in bytes)
        Dim safedelegate As New ChangeTextsSafe(AddressOf ProgressDownload1)
        Me.Invoke(safedelegate, length, 0, 0) 'Invoke the TreadsafeDelegate
        Dim writeStream As New IO.FileStream(Fichier, IO.FileMode.Create)
        Dim nRead As Integer
        Dim readings As Integer = 0
        Do
            If BackgroundWorker1.CancellationPending Then 'If user abort download
                Exit Do
            End If
            Dim readBytes(4095) As Byte
            Dim bytesread As Short = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
            nRead += bytesread
            Dim percent As Integer = CInt(((nRead / 1024) * 100) / (length / 1024))
            Me.Invoke(safedelegate, length, nRead, percent)
            If bytesread = 0 Then Exit Do
            writeStream.Write(readBytes, 0, bytesread)
            readings += 1
        Loop
        theResponse.GetResponseStream.Close()
        writeStream.Close()
        If Me.BackgroundWorker1.CancellationPending Then
            IO.File.Delete(Fichier)
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete1)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End If
        Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete1)
        Me.Invoke(completeDelegate, False)
    End Sub
    Public Sub ProgressDownload1(ByVal length As Integer, ByVal position As Integer, ByVal percent As Integer)
        Size1.Text = Math.Round((length / 1024 / 1024), 2) & " MO"
        Down1.Text = Math.Round((position / 1024 / 1024), 2) & " MO"
        Me.ProgressBar1.Value = percent
        Pourcentage1.Text = percent & " %"
    End Sub
    Public Sub DownloadComplete1(ByVal cancelled As Boolean)
        TexteUrl1.Text = ""
        Down1.Text = ""
        Pourcentage1.Text = ""
        ProgressBar1.Value = 0
        Dim Index As Integer = Val(Index1.Text) + 1
        If cancelled = False Then : EcrireINI("Menu", Str(Index), LireINI("Menu", Str(Index), FichierIni) & "*1", FichierIni) : End If
        ListView1.Items(Index - 1).ForeColor = Color.Lime '<=Modifier
        ListView1.Items(Index - 1).BackColor = Color.Teal '<=Modifier
        Dim a As Integer = Val(Label2.Text) + 1
        Label2.Text = a
        AfficherMasquerDownload(1, 0)
    End Sub
    Private Sub Download2()
        Dim Absent As Boolean
        Dim Fichier As String = Nothing
        Dim Rep As String = Nothing
        Timer1.Stop()
        For Compte = 0 To ListView1.Items.Count - 1
            Url2 = ListView1.Items(Compte).Text
            If Url2 <> Url1 And Url2 <> Url3 And Url2 <> Url4 And Url2 <> Url5 Then
                Dim pos As Integer = Url1.LastIndexOf("/")
                Dim T = LireINI("Menu", Str(Compte + 1), FichierIni)
                Dim W As String = T.Substring(Len(T) - 2)
                If W = "*1" Then
                    Absent = False
                Else
                    Absent = True
                    AfficherMasquerDownload(2, 1) '<=Modifier
                    ListView1.Items(Compte).ForeColor = Color.Red '<=Modifier
                    ListView1.Items(Compte).BackColor = Color.Yellow '<=Modifier
                    Index2.Text = Compte '<=Modifier(Label Index)
                    Exit For
                End If
            End If
        Next
        If Absent = True Then
            Timer1.Start()
            TexteUrl2.Text = Url2
            Rep = TexteUrl2.Text.Substring(7)
            Rep = Repertoire & Microsoft.VisualBasic.Left(Rep, Rep.LastIndexOf("/")) & "\"
            System.IO.Directory.CreateDirectory(Rep)
            Fichier = TexteUrl2.Text.Substring(TexteUrl2.Text.LastIndexOf("/") + 1)
            BackgroundWorker2.RunWorkerAsync(New Object() {Rep & Fichier})
        End If
    End Sub
    Private Sub BackgroundWorker2_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker2.DoWork
        Dim Fichier As String = e.Argument(0)
        Dim theResponse As HttpWebResponse
        Dim theRequest As HttpWebRequest
        Dim Credit As NetworkCredential = New NetworkCredential(Identifiant, Password)
        Try
            ' theRequest.Credentials = Credit
            theRequest = WebRequest.Create(TexteUrl1.Text)
            theResponse = theRequest.GetResponse
        Catch ex As Exception
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete2)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End Try
        Dim length As Integer = theResponse.ContentLength
        Dim safedelegate As New ChangeTextsSafe(AddressOf ProgressDownload2)
        Me.Invoke(safedelegate, length, 0, 0)
        Dim writeStream As New IO.FileStream(Fichier, IO.FileMode.Create)
        Dim nRead As Integer
        Dim readings As Integer = 0
        Do
            If BackgroundWorker2.CancellationPending Then
                Exit Do
            End If
            Dim readBytes(4095) As Byte
            Dim bytesread As Short = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
            nRead += bytesread
            Dim percent As Integer = CInt(((nRead / 1024) * 100) / (length / 1024))
            Me.Invoke(safedelegate, length, nRead, percent)
            If bytesread = 0 Then Exit Do
            writeStream.Write(readBytes, 0, bytesread)
            readings += 1
        Loop
        theResponse.GetResponseStream.Close()
        writeStream.Close()
        If Me.BackgroundWorker2.CancellationPending Then
            IO.File.Delete(Fichier)
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete2)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End If
        Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete2)
        Me.Invoke(completeDelegate, False)
    End Sub
    Public Sub ProgressDownload2(ByVal length As Integer, ByVal position As Integer, ByVal percent As Integer)
        Size2.Text = Math.Round((length / 1024 / 1024), 2) & " MO"
        Down2.Text = Math.Round((position / 1024 / 1024), 2) & " MO"
        ProgressBar2.Value = percent
        Pourcentage2.Text = percent & " %"
    End Sub
    Public Sub DownloadComplete2(ByVal cancelled As Boolean)
        TexteUrl2.Text = ""
        Down2.Text = ""
        Pourcentage2.Text = ""
        ProgressBar2.Value = 0
        Dim Index As Integer = Val(Index2.Text) + 1
        If cancelled = False Then : EcrireINI("Menu", Str(Index), LireINI("Menu", Str(Index), FichierIni) & "*1", FichierIni) : End If
        ListView1.Items(Index - 1).ForeColor = Color.Lime '<=Modifier
        ListView1.Items(Index - 1).BackColor = Color.Teal '<=Modifier
        Dim a As Integer = Val(Label2.Text) + 1
        Label2.Text = a
        AfficherMasquerDownload(2, 0)
    End Sub
    Private Sub Download3()
        Dim Absent As Boolean
        Dim Fichier As String = Nothing
        Dim Rep As String = Nothing
        Timer1.Stop()
        For Compte = 0 To ListView1.Items.Count - 1
            Url3 = ListView1.Items(Compte).Text
            If Url3 <> Url1 And Url3 <> Url2 And Url3 <> Url4 And Url3 <> Url5 Then
                Dim pos As Integer = Url3.LastIndexOf("/")
                Dim T = LireINI("Menu", Str(Compte + 1), FichierIni)
                Dim W As String = T.Substring(Len(T) - 2)
                If W = "*1" Then
                    Absent = False
                Else
                    Absent = True
                    AfficherMasquerDownload(3, 1) '<=Modifier
                    ListView1.Items(Compte).ForeColor = Color.Red '<=Modifier
                    ListView1.Items(Compte).BackColor = Color.Yellow '<=Modifier
                    Index3.Text = Compte '<=Modifier(Label Index)
                    Exit For
                End If
            End If
        Next
        If Absent = True Then
            Timer1.Start()
            TexteUrl3.Text = Url3
            Rep = TexteUrl3.Text.Substring(7)
            Rep = Repertoire & Microsoft.VisualBasic.Left(Rep, Rep.LastIndexOf("/")) & "\"
            System.IO.Directory.CreateDirectory(Rep)
            Fichier = TexteUrl3.Text.Substring(TexteUrl3.Text.LastIndexOf("/") + 1)
            BackgroundWorker3.RunWorkerAsync(New Object() {Rep & Fichier})
        End If
    End Sub
    Private Sub BackgroundWorker3_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker3.DoWork
        Dim Fichier As String = e.Argument(0)
        Dim theResponse As HttpWebResponse
        Dim theRequest As HttpWebRequest
        Dim Credit As NetworkCredential = New NetworkCredential(Identifiant, Password)
        Try
            ' theRequest.Credentials = Credit
            theRequest = WebRequest.Create(TexteUrl3.Text)
            theResponse = theRequest.GetResponse
        Catch ex As Exception
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete3)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End Try
        Dim length As Integer = theResponse.ContentLength
        Dim safedelegate As New ChangeTextsSafe(AddressOf ProgressDownload3)
        Me.Invoke(safedelegate, length, 0, 0)
        Dim writeStream As New IO.FileStream(Fichier, IO.FileMode.Create)
        Dim nRead As Integer
        Dim readings As Integer = 0
        Do
            If BackgroundWorker3.CancellationPending Then
                Exit Do
            End If
            Dim readBytes(4095) As Byte
            Dim bytesread As Short = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
            nRead += bytesread
            Dim percent As Integer = CInt(((nRead / 1024) * 100) / (length / 1024))
            Me.Invoke(safedelegate, length, nRead, percent)
            If bytesread = 0 Then Exit Do
            writeStream.Write(readBytes, 0, bytesread)
            readings += 1
        Loop
        theResponse.GetResponseStream.Close()
        writeStream.Close()
        If Me.BackgroundWorker3.CancellationPending Then
            IO.File.Delete(Fichier)
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete3)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End If
        Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete3)
        Me.Invoke(completeDelegate, False)
    End Sub
    Public Sub ProgressDownload3(ByVal length As Integer, ByVal position As Integer, ByVal percent As Integer)
        Size3.Text = Math.Round((length / 1024 / 1024), 2) & " MO"
        Down3.Text = Math.Round((position / 1024 / 1024), 2) & " MO"
        ProgressBar3.Value = percent
        Pourcentage3.Text = percent & " %"
    End Sub
    Public Sub DownloadComplete3(ByVal cancelled As Boolean)
        TexteUrl3.Text = ""
        Down3.Text = ""
        Pourcentage3.Text = ""
        ProgressBar3.Value = 0
        Dim Index As Integer = Val(Index3.Text) + 1
        If cancelled = False Then : EcrireINI("Menu", Str(Index), LireINI("Menu", Str(Index), FichierIni) & "*1", FichierIni) : End If
        ListView1.Items(Index - 1).ForeColor = Color.Lime '<=Modifier
        ListView1.Items(Index - 1).BackColor = Color.Teal '<=Modifier
        Dim a As Integer = Val(Label2.Text) + 1
        Label2.Text = a
        AfficherMasquerDownload(3, 0)
    End Sub
    Private Sub Download4()
        Dim Absent As Boolean
        Dim Fichier As String = Nothing
        Dim Rep As String = Nothing
        Timer1.Stop()
        For Compte = 0 To ListView1.Items.Count - 1
            Url4 = ListView1.Items(Compte).Text
            If Url4 <> Url1 And Url4 <> Url2 And Url4 <> Url3 And Url4 <> Url5 Then
                Dim pos As Integer = Url4.LastIndexOf("/")
                Dim T = LireINI("Menu", Str(Compte + 1), FichierIni)
                Dim W As String = T.Substring(Len(T) - 2)
                If W = "*1" Then
                    Absent = False
                Else
                    Absent = True
                    AfficherMasquerDownload(4, 1)
                    ListView1.Items(Compte).ForeColor = Color.Red
                    ListView1.Items(Compte).BackColor = Color.Yellow
                    Index4.Text = Compte '<=Modifier(Label Index)
                    Exit For
                End If
            End If
        Next
        If Absent = True Then
            Timer1.Start()
            TexteUrl4.Text = Url4
            Rep = TexteUrl4.Text.Substring(7)
            Rep = Repertoire & Microsoft.VisualBasic.Left(Rep, Rep.LastIndexOf("/")) & "\"
            System.IO.Directory.CreateDirectory(Rep)
            Fichier = TexteUrl4.Text.Substring(TexteUrl4.Text.LastIndexOf("/") + 1)
            BackgroundWorker4.RunWorkerAsync(New Object() {Rep & Fichier})
        End If
    End Sub
    Private Sub BackgroundWorker4_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker4.DoWork
        Dim Fichier As String = e.Argument(0)
        Dim theResponse As HttpWebResponse
        Dim theRequest As HttpWebRequest
        Dim Credit As NetworkCredential = New NetworkCredential(Identifiant, Password)
        Try
            ' theRequest.Credentials = Credit
            theRequest = WebRequest.Create(TexteUrl4.Text)
            theResponse = theRequest.GetResponse
        Catch ex As Exception
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete4)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End Try
        Dim length As Integer = theResponse.ContentLength
        Dim safedelegate As New ChangeTextsSafe(AddressOf ProgressDownload4)
        Me.Invoke(safedelegate, length, 0, 0)
        Dim writeStream As New IO.FileStream(Fichier, IO.FileMode.Create)
        Dim nRead As Integer
        Dim readings As Integer = 0
        Do
            If BackgroundWorker4.CancellationPending Then
                Exit Do
            End If
            Dim readBytes(4095) As Byte
            Dim bytesread As Short = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
            nRead += bytesread
            Dim percent As Integer = CInt(((nRead / 1024) * 100) / (length / 1024))
            Me.Invoke(safedelegate, length, nRead, percent)
            If bytesread = 0 Then Exit Do
            writeStream.Write(readBytes, 0, bytesread)
            readings += 1
        Loop
        theResponse.GetResponseStream.Close()
        writeStream.Close()
        If Me.BackgroundWorker4.CancellationPending Then
            IO.File.Delete(Fichier)
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete4)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End If
        Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete4)
        Me.Invoke(completeDelegate, False)
    End Sub
    Public Sub ProgressDownload4(ByVal length As Integer, ByVal position As Integer, ByVal percent As Integer)
        Size4.Text = Math.Round((length / 1024 / 1024), 2) & " MO"
        Down4.Text = Math.Round((position / 1024 / 1024), 2) & " MO"
        ProgressBar4.Value = percent
        Pourcentage4.Text = percent & " %"
    End Sub
    Public Sub DownloadComplete4(ByVal cancelled As Boolean)
        TexteUrl4.Text = ""
        Down4.Text = ""
        Pourcentage4.Text = ""
        ProgressBar4.Value = 0
        Dim Index As Integer = Val(Index4.Text) + 1
        If cancelled = False Then : EcrireINI("Menu", Str(Index), LireINI("Menu", Str(Index), FichierIni) & "*1", FichierIni) : End If
        ListView1.Items(Index - 1).ForeColor = Color.Lime '<=Modifier
        ListView1.Items(Index - 1).BackColor = Color.Teal '<=Modifier
        Dim a As Integer = Val(Label2.Text) + 1
        Label2.Text = a
        AfficherMasquerDownload(4, 0)
    End Sub
    Private Sub Download5()
        Dim Absent As Boolean
        Dim Fichier As String = Nothing
        Dim Rep As String = Nothing
        Timer1.Stop()
        For Compte = 0 To ListView1.Items.Count - 1
            Url5 = ListView1.Items(Compte).Text
            If Url5 <> Url1 And Url5 <> Url2 And Url5 <> Url3 And Url5 <> Url4 Then
                Dim pos As Integer = Url5.LastIndexOf("/")
                Dim T = LireINI("Menu", Str(Compte + 1), FichierIni)
                Dim W As String = T.Substring(Len(T) - 2)
                If W = "*1" Then
                    Absent = False
                Else
                    Absent = True
                    AfficherMasquerDownload(5, 1)
                    ListView1.Items(Compte).ForeColor = Color.Red
                    ListView1.Items(Compte).BackColor = Color.Yellow
                    Index5.Text = Compte
                    Exit For
                End If
            End If
        Next
        If Absent = True Then
            Timer1.Start()
            TexteUrl5.Text = Url5
            Rep = TexteUrl5.Text.Substring(7)
            Rep = Repertoire & Microsoft.VisualBasic.Left(Rep, Rep.LastIndexOf("/")) & "\"
            System.IO.Directory.CreateDirectory(Rep)
            Fichier = TexteUrl5.Text.Substring(TexteUrl5.Text.LastIndexOf("/") + 1)
            BackgroundWorker5.RunWorkerAsync(New Object() {Rep & Fichier})
        End If
    End Sub
    Private Sub BackgroundWorker5_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker5.DoWork
        Dim Fichier As String = e.Argument(0)
        Dim theResponse As HttpWebResponse
        Dim theRequest As HttpWebRequest
        Dim Credit As NetworkCredential = New NetworkCredential(Identifiant, Password)
        Try
            ' theRequest.Credentials = Credit
            theRequest = WebRequest.Create(TexteUrl5.Text)
            theResponse = theRequest.GetResponse
        Catch ex As Exception
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete5)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End Try
        Dim length As Integer = theResponse.ContentLength
        Dim safedelegate As New ChangeTextsSafe(AddressOf ProgressDownload5)
        Me.Invoke(safedelegate, length, 0, 0)
        Dim writeStream As New IO.FileStream(Fichier, IO.FileMode.Create)
        Dim nRead As Integer
        Dim readings As Integer = 0
        Do
            If BackgroundWorker5.CancellationPending Then
                Exit Do
            End If
            Dim readBytes(4095) As Byte
            Dim bytesread As Short = theResponse.GetResponseStream.Read(readBytes, 0, 4096)
            nRead += bytesread
            Dim percent As Integer = CInt(((nRead / 1024) * 100) / (length / 1024))
            Me.Invoke(safedelegate, length, nRead, percent)
            If bytesread = 0 Then Exit Do
            writeStream.Write(readBytes, 0, bytesread)
            readings += 1
        Loop
        theResponse.GetResponseStream.Close()
        writeStream.Close()
        If BackgroundWorker5.CancellationPending Then
            IO.File.Delete(Fichier)
            Dim cancelDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete5)
            Me.Invoke(cancelDelegate, True)
            Exit Sub
        End If
        Dim completeDelegate As New DownloadCompleteSafe(AddressOf DownloadComplete5)
        Me.Invoke(completeDelegate, False)
    End Sub
    Public Sub ProgressDownload5(ByVal length As Integer, ByVal position As Integer, ByVal percent As Integer)
        Size5.Text = Math.Round((length / 1024 / 1024), 2) & " MO"
        Down5.Text = Math.Round((position / 1024 / 1024), 2) & " MO"
        ProgressBar5.Value = percent
        Pourcentage5.Text = percent & " %"
    End Sub
    Public Sub DownloadComplete5(ByVal cancelled As Boolean)
        TexteUrl5.Text = ""
        Down5.Text = ""
        Pourcentage5.Text = ""
        ProgressBar5.Value = 0
        Dim Index As Integer = Val(Index5.Text) + 1
        If cancelled = False Then : EcrireINI("Menu", Str(Index), LireINI("Menu", Str(Index), FichierIni) & "*1", FichierIni) : End If
        ListView1.Items(Index - 1).ForeColor = Color.Lime '<=Modifier
        ListView1.Items(Index - 1).BackColor = Color.Teal '<=Modifier
        Dim a As Integer = Val(Label2.Text) + 1
        Label2.Text = a
        AfficherMasquerDownload(5, 0)
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        AfficherMasquerDownload(1, 0)
        AfficherMasquerDownload(2, 0)
        AfficherMasquerDownload(3, 0)
        AfficherMasquerDownload(4, 0)
        AfficherMasquerDownload(5, 0)
        Dim MyFolderBrowser As New System.Windows.Forms.FolderBrowserDialog
        MyFolderBrowser.Description = "Selectionnez le répertoire de destination:"
        MyFolderBrowser.SelectedPath = "E:\"
        Dim dlgResult As DialogResult = MyFolderBrowser.ShowDialog()
        If dlgResult = Windows.Forms.DialogResult.OK Then
            Repertoire = MyFolderBrowser.SelectedPath + "\"
        End If
        FichierIni = Repertoire & "Fichiers.ini"
        Dim Nombre As Integer = Val(LireINI("Menu", "Nombre", FichierIni))
        Label3.Text = Nombre
        ListView1.Focus()
        Dim Url1 As String
        For Compte = 0 To Nombre - 1
            Url1 = LireINI("Menu", Str(Compte + 1), FichierIni)
            Dim pos As Integer = Url1.LastIndexOf("*")
            If Microsoft.VisualBasic.Right(Url1, 2) = "*1" Then
                If pos > 0 Then : Url1 = Microsoft.VisualBasic.Left(Url1, pos) : End If
                ListView1.Items.Add(Url1)
                Dim a As Integer = Val(Label2.Text) + 1
                Label2.Text = a
                ListView1.Items(Compte).Selected = True
                ListView1.Items(Compte).ForeColor = Color.Lime
            Else
                ListView1.Items.Add(Url1)
            End If
        Next
        If ListView1.Items.Count > 0 Then
            ListView1.MultiSelect = False
            ListView1.Items(0).Focused = True
            ListView1.Items(0).Selected = True
        End If
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Download1()
        Download2()
        Download3()
        Download4()
        Download5()
    End Sub
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If BackgroundWorker1.IsBusy Then:Else : Download1():End If
        If BackgroundWorker2.IsBusy Then:Else : Download2():End If
        If BackgroundWorker3.IsBusy Then:Else : Download3():End If
        If BackgroundWorker4.IsBusy Then : Else : Download4() : End If
        If BackgroundWorker5.IsBusy Then : Else : Download5() : End If
    End Sub
End Class

Si quelqu'un a une solution autre que le timer je suis preneur...
Merci.

26/01/2013, 11h11
Pol63

ton code est moche et je ne sais pas par ou commencer pour te donner des conseils
mais un select case avec autant de ligne de code c'est pas génial
1 backgroundworker c'est pas utile si c'est pour télécharger un fichier, le webclient fait ca très bien en asynchrone (avec report d'avancement aussi)
et 5 webclient avec chacun leurs méthodes ca ne se fait pas non plus, il faut une méthode pour les 5

sinon tu nous dis ce que tu veux faire exactement pour qu'on puisse t'aiguiller
26/01/2013, 17h44
programmes

Pardon mais je débute en vb
Mon but final est de pouvoir télécharger une liste de fichiers. Je voudrais également qu' il télécharge cing fichiers en même temps c'est pour cette raison que j'avais créé cinq backgroundworker.
J'avais essayé avec un webclient mais j'étais limiter à deux téléchargements à la fois.
Encore merci de bien vouloir m'aiguiller...
26/01/2013, 18h46
Mario Rousson

Je suis pas un expert mais il me semble que le backgroundworker n'est pas l'outil qu'il te faut pour téléchargé cinq fichiers à la fois, tu serais mieux avec multitreading.
26/01/2013, 23h48
Pol63

Citation:

Envoyé par Mario Rousson

Je suis pas un expert mais il me semble que le backgroundworker n'est pas l'outil qu'il te faut pour téléchargé cinq fichiers à la fois, tu serais mieux avec multitreading.

le backgroundworker sert à faire du multithreading ^^
27/01/2013, 08h30
programmes

Vous pouvez me dire comment faire un multireading pour télécharger les cing fichiers à la fois?
27/01/2013, 10h39
Pol63

un webclient par fichier et .DownloadFileAsync
ca implémente du multithreading
27/01/2013, 11h04
programmes

J'ai déjà essayé mais apparamment avec cette méthode on est limiter à deux téléchargement à la fois.Tu peux me confirmer?
27/01/2013, 14h01
Pol63

1 pièce(s) jointe(s)

le webclient n'est pas limité à 2 téléchargements, après je crois qu'il y a en effet une limitation à 2 fichiers par serveur simultanément, mais je ne sais pas si ca vient du webclient ou du serveur (mais du serveur je pense ...)

je t'ai mis un exemple de code propore en pièce jointe (il manque 2 ou 3 trucs mais il y a les bases)
si tu as des questions n'hésite pas
27/01/2013, 19h15
programmes

Je te remercie vraiment c'est un bon début.
Effectivement, je suis limité à deux téléchargements.
J'ai essayé de déclarer un deuxième webclient mais idem.
Si je peux me permettre, tu n'aurais pas une solution pour contourner ce problème?
C'est dommage, car l'exemple que tu m'as fourni est vraiment bien...
27/01/2013, 22h02
Pol63

en cherchant sur google j'ai trouvé où était fixée la limite (donc tu aurais pu trouver aussi ...)

Code:

System.Net.ServicePointManager.DefaultConnectionLimit = 10

et là ca passe à 10

au passage j'ai testé avec des httpwebrequest, le code est plus compliqué mais l'interface plus réactive (et la limite est fixée par la même propriété)

il suffit donc de mettre cette ligne de code au démarrage du programme
si tu pars sur mon code, il manque entre autres la suppression du fichier si annulation
28/01/2013, 08h22
programmes

Je te remercie beaucoup c'est nickel!
A+ et bonne journée!