Sujet Précédent Sujet Suivant

Erreur avec Invoke

Résolu
cs_LycanOSX Messages postés 58 Date d'inscription mardi 21 septembre 2010 Statut Membre Dernière intervention 14 juillet 2013 - 1 janv. 2013 à 18:00
cs_LycanOSX Messages postés 58 Date d'inscription mardi 21 septembre 2010 Statut Membre Dernière intervention 14 juillet 2013 - 1 janv. 2013 à 21:19
Bonjours, dans un programme j'utilise la fonction Invoke, comme ceci: 
Private Sub Listen()
        While client.Connected
            Try
                Dim readLine As String = streamr.ReadLine
                Dim Msg As String = readLine.Replace(readLine.Split("::")(0) & "::", "")

                If readLine.Split("::")(0) = "NEW_MESSAGE" Then
                    Me.Invoke(New DAddItem(AddressOf AddItem), Msg)
                    If Me.WindowState = FormWindowState.Minimized Then
                        EmitChatSound("new_msg.wav")
                    End If
                ElseIf readLine.Split("::")(0) = "NEW_CONNECTION" Then
                    Me.Invoke(New DAddItem(AddressOf AddItem), Msg & " is now connected.")
                ElseIf readLine.Split("::")(0) = "NEW_DISCONNECTION" Then
                    Me.Invoke(New DAddItem(AddressOf AddItem), Msg & " is now disconnected.")
                End If
            Catch ex As Exception
                MessageBox.Show("Error: " & ex.Message)
                Application.Exit()
            End Try
        End While
    End Sub


Mais j'ai cette erreur: Impossible d'appeler Invoke ou BeginInvoke sur un contrôle tant que le handle de fenêtre n'a pas était créé. Je ne comprend vraiment pas quelqu'un pourrait il m'aider s'il vous plait? Merci!

7 réponses

Réponse 1 / 7
Utilisateur anonyme
1 janv. 2013 à 18:40
Tu dois toujours faire un test avant Invoke : 
if me.invokerequired then 
   me.invoke(...
else
  '...
end if
3
Réponse 2 / 7
Utilisateur anonyme
1 janv. 2013 à 18:06
Bonjour,

On ne voit pas comment tu charges ton formulaire et comment tu appelles ta sub Listen.
0
Réponse 3 / 7
cs_LycanOSX Messages postés 58 Date d'inscription mardi 21 septembre 2010 Statut Membre Dernière intervention 14 juillet 2013 3
1 janv. 2013 à 18:19
Oups petit oublie excuse moi,

J'appelle la Sub Listen: 
Private t As New Threading.Thread(AddressOf Listen)


Puis j'utilise (s'éxecute quand la fenêtre s'ffiche): 
t.Start()


Ce qui ce passe quand je charge la fenêtre: 
    'chargement de la fenêtre principale
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        WebBrowser1.DocumentText =  _
        " 	"

AskIpLine:
        ip = InputBox("Choose the server IP:", "IP", "127.0.0.1")
        If Not isIp(ip) Then
            MsgBox("The text you typed isn't an ip!")
            GoTo AskIpLine
        End If

AskNickLine:
        If Not cl_IsNickSet(ip) Then
            nick = InputBox("Choose a nickname for this server:", "Nickname", "")
            If nick = Nothing Then
                MsgBox("Please choose a nickname!")
                GoTo AskNickLine
            End If
            cl_AddNick(ip, nick)
        Else
            nick = cl_GetNick(ip)
        End If

        TextBox1.ContextMenuStrip = ContextMenuStrip1
        Timer1.Start()

    End Sub


Et si vous avez beoin du coe complet, le voici: 
Imports System.Net.Sockets
Imports System.IO
Imports System
Imports System.Collections
Imports System.Globalization

Public Class Form1
    Private stream As NetworkStream
    Private streamw As StreamWriter
    Private streamr As StreamReader
    Private client As New TcpClient
    Private t As New Threading.Thread(AddressOf Listen)
    Private Delegate Sub DAddItem(ByVal s As String)
    Private nick As String = "unknown"
    Private ip As String

    Private Sub AddItem(ByVal s As String)
        WebBrowser1.DocumentText = WebBrowser1.DocumentText & s & "
"
    End Sub


    'Retourne un paramètre dans le fichier de config skin.ini
    Private Function cl_GetSkin(ByVal param As String)
        Dim result As String = ""
        Dim skinFile As String = My.Computer.FileSystem.ReadAllText(Application.StartupPath & "/skin.ini")
        For Each line As String In skinFile.Split(vbNewLine)
            If line.Contains(param) Then
                result = line.Split("=")(1)
            End If
        Next
        Return result
    End Function



    'Retourne si le nickname est enregistre dans nicknames.ini
    Private Function cl_IsNickSet(ByVal strIp As String)
        Dim result As Boolean = False
        Dim skinFile As String = My.Computer.FileSystem.ReadAllText(Application.StartupPath & "/nicknames.ini")
        For Each line As String In skinFile.Split(vbNewLine)
            If line.Contains(strIp) Then
                result = True
            End If
        Next
        Return result
    End Function

    'Retourne un nickname en fonction d'une ip en le sortant de nicknames.ini
    Private Function cl_GetNick(ByVal strIp As String)
        Dim result As String = ""
        Dim skinFile As String = My.Computer.FileSystem.ReadAllText(Application.StartupPath & "/nicknames.ini")
        For Each line As String In skinFile.Split(vbNewLine)
            If line.Contains(strIp) Then
                result = line.Split("=")(1)
            End If
        Next
        Return result
    End Function

    'Ajoute un nickname au fichier nicknames.ini (remplace si le nick demandé existe déjà)
    Private Sub cl_AddNick(ByVal strIp As String, ByVal strNick As String)
        Dim lines() As String = File.ReadAllLines(Application.StartupPath & "\nicknames.ini")
        Dim writer As New StreamWriter(Application.StartupPath & "\nicknames.ini")
        For Each line As String In lines
            If Not line.Contains(strIp) Then
                writer.WriteLine(line)
            End If
        Next
        writer.Close()
        Dim objStreamWriter As New StreamWriter(Application.StartupPath & "\nicknames.ini", True)
        objStreamWriter.WriteLine(strIp & " = " & strNick)
        objStreamWriter.Close()
    End Sub


    'Retourne True si en string donné à bien le format d'une IP
    Private Function isIp(ByVal str As String)
        Dim result As Boolean = False
        If str.Split(".").Length = 4 Then
            result = True
            For Each i As String In str.Split(".")
                If IsNumeric(i) Then
                    If Not result = False Then
                        result = True
                    End If
                Else
                    result = False
                End If
            Next
        End If
        Return result
    End Function

    Private Sub Form1_Shown(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Shown

        Try
            client.Connect(ip, 8888)
            If client.Connected Then
                stream = client.GetStream
                streamw = New StreamWriter(stream)
                streamr = New StreamReader(stream)

                streamw.WriteLine(nick)
                streamw.Flush()

                t.Start()

                If ip = "127.0.0.1" Then
                Else
                    ContextMenuStrip1.Items.Remove(AdminToolStripMenuItem)
                End If

                Dim wlcMessage As String = cl_GetSkin("wlcMessage")
                wlcMessage = wlcMessage.Replace("%nick%", nick)
                wlcMessage = wlcMessage.Replace("%ip%", ip)
                WebBrowser1.DocumentText = WebBrowser1.DocumentText & wlcMessage & "
"

            Else
                MessageBox.Show("The server isn't launched!")
                Application.Exit()
            End If
        Catch ex As Exception
            MessageBox.Show("Error: " & ex.Message)
            Application.Exit()
        End Try
    End Sub


    'Envoyer un message au serveur
    Private Sub sendMsg(ByVal text As String)
        streamw.WriteLine(text)
        streamw.Flush()
    End Sub

    Private Sub sendChatFormatMsg(ByVal txt As String)
        sendMsg("NEW_MESSAGE::" & txt)
    End Sub

    'Envoyer un message au serveur preformaté pour le chat (ex: User >> Bonjour!)
    Private Sub sendMsgTextbox()
        If Not TextBox1.Text = Nothing Then
            sendChatFormatMsg(TextBox1.Text)
            TextBox1.Clear()
        End If
    End Sub

    Private Sub EmitChatSound(ByVal sound As String)
        Dim ChatSound As New System.Media.SoundPlayer(Application.StartupPath & "/sounds/" & sound)
        ChatSound.Play()
    End Sub




    'Envois le message quand on appuis sur entrer
    Private Sub Textbox1_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
        If e.KeyCode = Keys.Enter Then
            sendMsgTextbox()
        End If
    End Sub

    'Envois le message quand on appuis sur le boutton
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        sendMsgTextbox()
    End Sub




    Private Sub Listen()
        While client.Connected
            Try
                Dim readLine As String = streamr.ReadLine
                Dim Msg As String = readLine.Replace(readLine.Split("::")(0) & "::", "")

                If readLine.Split("::")(0) = "NEW_MESSAGE" Then
                    Me.Invoke(New DAddItem(AddressOf AddItem), Msg)
                    If Me.WindowState = FormWindowState.Minimized Then
                        EmitChatSound("new_msg.wav")
                    End If
                ElseIf readLine.Split("::")(0) = "NEW_CONNECTION" Then
                    Me.Invoke(New DAddItem(AddressOf AddItem), Msg & " is now connected.")
                ElseIf readLine.Split("::")(0) = "NEW_DISCONNECTION" Then
                    Me.Invoke(New DAddItem(AddressOf AddItem), Msg & " is now disconnected.")
                End If
            Catch ex As Exception
                MessageBox.Show("Error: " & ex.Message)
                Application.Exit()
            End Try
        End While
    End Sub

    'chargement de la fenêtre principale
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        WebBrowser1.DocumentText = _
        " 	"

AskIpLine:
        ip = InputBox("Choose the server IP:", "IP", "127.0.0.1")
        If Not isIp(ip) Then
            MsgBox("The text you typed isn't an ip!")
            GoTo AskIpLine
        End If

AskNickLine:
        If Not cl_IsNickSet(ip) Then
            nick = InputBox("Choose a nickname for this server:", "Nickname", "")
            If nick = Nothing Then
                MsgBox("Please choose a nickname!")
                GoTo AskNickLine
            End If
            cl_AddNick(ip, nick)
        Else
            nick = cl_GetNick(ip)
        End If

        TextBox1.ContextMenuStrip = ContextMenuStrip1
        Timer1.Start()

    End Sub




    '---------- Début Context Menu ----------

    'Insertion des styles d'écriture dans la textbox
    Private Sub BoldToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles BoldToolStripMenuItem.Click
        TextBox1.Text = TextBox1.Text & "  "
    End Sub

    Private Sub HighlightedToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles HighlightedToolStripMenuItem.Click
        TextBox1.Text  = TextBox1.Text & "<mark></mark>"
    End Sub

    Private Sub ItalicToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles ItalicToolStripMenuItem.Click
        TextBox1.Text = TextBox1.Text & ""
    End Sub


    'Insertion d'élements (videos, audio...) dans le chat
    'Audio
    Private Sub AudioToolStripMenuItem1_Click(sender As System.Object, e As System.EventArgs) Handles AudioToolStripMenuItem1.Click
        Dim dialog As New Object
        dialog = InputBox("Paste the audio URL here:", "Audio", "")
        If Not dialog = Nothing Then
            sendChatFormatMsg("[ " & dialog2 & "]"
        End If

    End Sub

    'Private Sub ColorToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles ColorToolStripMenuItem.Click
    'Dim textcolor As String
    '   If ColorDialog1.ShowDialog() = DialogResult.OK Then
    '      textColor = System.Drawing.ColorTranslator.ToHtml(ColorDialog1.Color)
    ' End If
    'End Sub

    'Private Sub FontToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles FontToolStripMenuItem.Click
    'Dim textfont As String
    '   If FontDialog1.ShowDialog() = DialogResult.OK Then
    '      textfont = FontDialog1.Font.Name
    ' End If
    'End Sub

    'Ouvrir le fichier de config skin.ini
    Private Sub EditChatSkinToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles EditChatSkinToolStripMenuItem.Click
        Dim proc As New Process
        proc.StartInfo.FileName = Application.StartupPath & "\skin.ini"
        proc.Start()
    End Sub

    'Changer son nickname
    Private Sub NicknameToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles NicknameToolStripMenuItem.Click
        Dim OldNick As String = nick
        Dim dialog As New Object
        dialog = InputBox("Choose a nickname for this server:", "Nickname", nick)
        If Not dialog = Nothing Then
            nick = dialog
            cl_AddNick(ip, dialog)
            sendMsg(OldNick & " changed his nickname to " & nick & ".")
        End If
        OldNick = Nothing
    End Sub

    'Envoyer un message en tant qu'administrateur
    Private Sub MessageAsAdminToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles MessageAsAdminToolStripMenuItem.Click

        Dim dialog As String
        dialog = InputBox("Write your message here:", "Message As Admin", "")
        If Not dialog = Nothing Then
            sendMsg("[ADMIN] >> " & dialog & "")
        End If
    End Sub

    Private Sub CleanNicknamesToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles CleanNicknamesToolStripMenuItem.Click
        Try
            Dim Reponse As MsgBoxResult
            Reponse = MsgBox("All saved nicknames are going to be removed, are you sure that you want to clear the nicknames?", vbEmpty Or vbYesNo)
            If Reponse = vbYes Then
                Dim objStreamWriter As New StreamWriter(Application.StartupPath & "\nicknames.ini")
                objStreamWriter.WriteLine("- Nicknames -")
                objStreamWriter.WriteLine(ip & " = " & nick)
                objStreamWriter.Close()
                MsgBox("Nicknames succesfully cleaned!")
            End If
        Catch ex As Exception
            MsgBox(" Error: " & ex.Message)
        End Try
    End Sub

    '---------- Fin Context Menu ----------



    'Afficher le context menu quand on appuis sur le bouton
    Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click
        ContextMenuStrip1.Show(MousePosition)
    End Sub


    Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
        TimeToolStripMenuItem.Text = CultureInfo.CurrentCulture.ToString & " | " & Format(Now, "hh:mm:ss")
    End Sub

End Class
0
Réponse 4 / 7
NHenry Messages postés 15134 Date d'inscription vendredi 14 mars 2003 Statut Modérateur Dernière intervention 22 juin 2024 159
1 janv. 2013 à 19:26
Bonjour, 

AskIpLine:
        ip = InputBox("Choose the server IP:", "IP", "127.0.0.1")
        If Not isIp(ip) Then
            MsgBox("The text you typed isn't an ip!")
            GoTo AskIpLine
        End If


Pourquoi un horrible Goto ?

Do
...
If ...
Exit Do
Else
...
End IF
Loop

v----Signature--------v----------------------------------------------
[list=ordered][*]Pour poser correctement une question et optimiser vos chances d'obtenir des réponses, pensez à lire le règlement CS, celui-ci pour bien poser votre question ou encore celui-ci pour les PFE et autres exercices.[*]Quand vous postez un code, merci d'utiliser la coloration syntaxique (3ième icône en partant de la droite : ).[*]En VB.NET pensez à activer Option Explicit et Option Strict (propriété du projet) et à retirer l'import automatique de l'espace de nom Microsoft.VisualBasic (onglet Références dans les propriétés du projet).[*]Si votre problème est résolu (et uniquement si c'est le cas), pensez à mettre "Réponse acceptée" sur le ou les messages qui vous ont aidés/list
---
Mon site
0

Vous n’avez pas trouvé la réponse que vous recherchez ?

Posez votre question
Réponse 5 / 7
cs_LycanOSX Messages postés 58 Date d'inscription mardi 21 septembre 2010 Statut Membre Dernière intervention 14 juillet 2013 3
1 janv. 2013 à 20:12
Merci pour l'info NHenry! Et j'at modifié le code, mais les messages NEW_CONNECTION::pseudo et NEW_DISCONNECTION::pseudo ne s'affichent toujours pas, voilà le code: 
Private Sub Listen()
        While client.Connected
            Try
                Dim readLine As String = streamr.ReadLine
                Dim Msg As String = readLine.Replace(readLine.Split("::")(0) & "::", "")

                If readLine.Split("::")(0) = "NEW_MESSAGE" Then
                    If Me.InvokeRequired Then
                        Me.Invoke(New DAddItem(AddressOf AddItem), Msg)
                    Else
                        AddItem(Msg)
                    End If
                    If Me.WindowState = FormWindowState.Minimized Then
                        EmitChatSound("new_msg.wav")
                    End If
                ElseIf readLine.Split("::")(0) = "NEW_CONNECTION" Then
                    If Me.InvokeRequired Then
                        Me.Invoke(New DAddItem(AddressOf AddItem), Msg & " is now connected.")
                    Else
                        AddItem(Msg & " is now connected.")
                    End If
                ElseIf readLine.Split("::")(0) = "NEW_DISCONNECTION" Then
                    If Me.InvokeRequired Then
                        Me.Invoke(New DAddItem(AddressOf AddItem), Msg & " is now disconnected.")
                    Else
                        AddItem(Msg & " is now disconnected.")
                    End If
                End If
            Catch ex As Exception
                MessageBox.Show("Error: " & ex.Message)
                Application.Exit()
            End Try
        End While
    End Sub


Aurais tu une idée s'il te plait? Merci!
0
Réponse 6 / 7
cs_LycanOSX Messages postés 58 Date d'inscription mardi 21 septembre 2010 Statut Membre Dernière intervention 14 juillet 2013 3
1 janv. 2013 à 20:13
Et ps: Les messages s'affichent bien du côté du serveur.
0
Réponse 7 / 7
cs_LycanOSX Messages postés 58 Date d'inscription mardi 21 septembre 2010 Statut Membre Dernière intervention 14 juillet 2013 3
1 janv. 2013 à 21:19
Mon problème semble résolu, en faite, mon serveur n’envoyai pas les messages comme il aurait dus! Je ferais signe si mon problème resurgis, mais merci beaucoup pour votre aide! Et banana32 tu m'a quand même aidé a fixer une erreur! Merci a tous!
0

Discussions similaires

VBNET pause...sleep...pause...sleep...
bimbo777 -
eldim -

4 réponses
[VB.NET] OpenFileDialog, débutant .NET
el_teedee -
zippro4012 -

6 réponses
créer un tirage de tarot divinatoire
copersil -
bultez -

12 réponses
StreamReader
MaitreTeTe -
MaitreTeTe -

10 réponses
VB.Net Instr Ça marche en .Net???
cs_JeffC1977 -
Kristof_Koder -

1 réponse
Rejoignez-nous