Salut a tous, transfuge d'excel , j'essaye d'adapter un code que j'utilisé sous excel vers visual basic 2010 express mais je bloque avec cette satané erreur.

échec de la conversion de la valeur de paramètre d'un string en byte[]
Ce projet est du bénévolat pour un regroupement d'anciens militaires qui pourra servir a d'autres si cela les intéresse.

je vous poste le code que j'utilise en espérant que quelqu'un puisse m'aider a le résoudre.

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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Imports System.IO
Imports System.Data.OleDb
Imports System.Text.RegularExpressions
Imports System.Diagnostics
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Binary
 
Friend Class FrmEntry
    Dim Main As New FrmMain
    Public ShowBind As String
    Public FormState As ModGlobal.Form_State
    Private Sub FrmEntry_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
        If FormState = Form_State.Add_RecordState Then
            KeyPreview = True
 
            Call ContextMnu()
            Call CapsLock()
            Call regimentItem()
            Me.BSave.Text = "Sauvegarde:"
            Me.Text = "Ajouter Enregistrement:"
            Call ImageSyntax()
 
            Try
                With OleCn
                    If .State <> ConnectionState.Open Then
                        .ConnectionString = StrConnection()
                        .Open()
                        'Initialized Command...
                        With OleDa
                            .SelectCommand = New OleDbCommand()
                            .SelectCommand.CommandText = "SELECT * FROM [registre]"
                            .SelectCommand.Connection = OleCn
                        End With
 
                        'Insert Command...
                        With OleDa
                            .InsertCommand = New OleDbCommand()
                            .InsertCommand.CommandText = "INSERT INTO [registre] ([ID_Membre] , [Nom] , [prenom] , [Grade] , [regiment] , [entreele] , [contingent] , " & _
                            "[sortiele] , [Mail] , [profession] , [Ville] , [CodePostal] , [Photos_membre] , [observation]) VALUES (@ID_Membre , @Nom , @Prenom , @Grade , @regiment , @entreele , @contingent , " & _
                            "@sortiele , @mail , @profession , @ville , @CodePostal , @photos_membre , @observation)"
 
                            .InsertCommand.Connection = OleCn
                            .InsertCommand.Parameters.Add("@ID_Membre", OleDbType.VarWChar, 50, "ID_Membre")
                            .InsertCommand.Parameters.Add("@Nom", OleDbType.VarWChar, 50, "Nom")
                            .InsertCommand.Parameters.Add("@Prenom", OleDbType.VarWChar, 50, "Prenom")
                            .InsertCommand.Parameters.Add("@Grade", OleDbType.VarWChar, 50, "Grade")
                            .InsertCommand.Parameters.Add("@regiment", OleDbType.VarWChar, 50, "regiment")
                            .InsertCommand.Parameters.Add("@entreele", OleDbType.VarWChar, 50, "entreele")
                            .InsertCommand.Parameters.Add("@contingent", OleDbType.VarWChar, 50, "contingent")
                            .InsertCommand.Parameters.Add("@sortiele", OleDbType.VarWChar, 50, "sortiele")
                            .InsertCommand.Parameters.Add("@mail", OleDbType.VarWChar, 50, "mail")
                            .InsertCommand.Parameters.Add("@profession", OleDbType.VarWChar, 50, "profession")
                            .InsertCommand.Parameters.Add("@ville", OleDbType.VarWChar, 50, "ville")
                            .InsertCommand.Parameters.Add("@CodePostal", OleDbType.VarWChar, 50, "codepostal")
                            .InsertCommand.Parameters.Add("@photos_membre", OleDbType.Binary, 0, "photos_membre")
                            .InsertCommand.Parameters.Add("@observation", OleDbType.VarWChar, 50, "observation")
 
                        End With
 
 
                        With OleDa
                            .UpdateCommand = New OleDbCommand()
                            .UpdateCommand.CommandText = "UPDATE [registre] SET [Nom] = @Nom , [prenom] = @Prenom , [Grade] = @Grade , [regiment] = @regiment , " & _
                            "[entreele] = @entreele , [contingent] = @contingent , [sortiele] = @sortiele , [Mail] = @mail , [profession] = @profession , [Ville] = @ville , [CodePostal] = @CodePostal , [Photos_membre] = @photos_membre , [observation] = @observation WHERE ([ID_Membre] = @ID_Membre_Syntax)"
 
                            .UpdateCommand.Connection = OleCn
                            .UpdateCommand.Parameters.Add("@Nom", OleDbType.VarWChar, 50, "Nom")
                            .UpdateCommand.Parameters.Add("@Prenom", OleDbType.VarWChar, 50, "Prenom")
                            .UpdateCommand.Parameters.Add("@Grade", OleDbType.VarWChar, 50, "Grade")
                            .UpdateCommand.Parameters.Add("@regiment", OleDbType.VarWChar, 50, "regiment")
                            .UpdateCommand.Parameters.Add("@entreele", OleDbType.VarWChar, 50, "entreele")
                            .UpdateCommand.Parameters.Add("@contingent", OleDbType.VarWChar, 50, "contingent")
                            .UpdateCommand.Parameters.Add("@sortiele", OleDbType.VarWChar, 50, "sortiele")
                            .UpdateCommand.Parameters.Add("@mail", OleDbType.VarWChar, 50, "mail")
                            .UpdateCommand.Parameters.Add("@profession", OleDbType.VarWChar, 50, "profession")
                            .UpdateCommand.Parameters.Add("@ville", OleDbType.VarWChar, 50, "ville")
                            .UpdateCommand.Parameters.Add("@CodePostal", OleDbType.VarWChar, 50, "codepostal")
                            .UpdateCommand.Parameters.Add("@photos_membre", OleDbType.Binary, 0, "photos_membre")
                            .UpdateCommand.Parameters.Add("@observation", OleDbType.VarWChar, 50, "observation")
 
 
                            .UpdateCommand.Parameters.Add(New System.Data.OleDb.OleDbParameter("@ID_Membre_Syntax", System.Data.OleDb.OleDbType.VarWChar, 50, _
                                                                                       System.Data.ParameterDirection.Input, False, _
                                                                            CType(0, Byte), CType(0, Byte), "ID_Membre", _
                                                             DataRowVersion.Default, True))
                        End With
 
 
                    End If
                End With
            Catch ex As Exception
                MsgBox(ex.Message(), MsgBoxStyle.Critical, "Error...")
            Finally
                OleCn.Close()
            End Try
            Exit Sub
        End If
 
        If FormState = Form_State.Edit_RecordState Then
            KeyPreview = True
 
            Call ContextMnu()
            Call CapsLock()
            Call regimentItem()
            Me.BSave.Text = "Mise à Jours:"
            Me.Text = "Edition Enregistrement:"
 
            Try
                With OleCn
                    If .State <> ConnectionState.Open Then
                        .ConnectionString = StrConnection()
                        .Open()
 
                        With OleDa
                            .SelectCommand = New OleDbCommand()
                            .SelectCommand.CommandText = "SELECT * FROM [registre] WHERE (ID_membre = @ID_Membre)"
                            .SelectCommand.Parameters.Add("@ID_Membre", OleDbType.VarChar, 50, "ID_Membre").Value = ShowBind.ToString()
                            .SelectCommand.Connection = OleCn
                        End With
 
 
                        With OleDa
                            .UpdateCommand = New OleDbCommand()
                            .UpdateCommand.CommandText = "UPDATE [registre] SET [ID_Membre] = @ID_Membre , [Nom] = @Nom , [prenom] = @Prenom , [Grade] = @Grade , [regiment] = @regiment , " & _
                            "[entreele] = @entreele , [contingent] = @contingent , [sortiele] = @sortiele , [Mail] = @mail , [profession] = @profession , [Ville] = @ville , [CodePostal] = @CodePostal , [Photos_membre] = @photos_membre , [observation] = @observation WHERE ([ID_Membre] = @ID_Membre_Syntax)"
                            .UpdateCommand.Connection = OleCn
                            .UpdateCommand.Parameters.Add("@ID_Membre", OleDbType.VarWChar, 50, "ID_Membre")
                            .UpdateCommand.Parameters.Add("@Nom", OleDbType.VarWChar, 50, "Nom")
                            .UpdateCommand.Parameters.Add("@Prenom", OleDbType.VarWChar, 50, "Prenom")
                            .UpdateCommand.Parameters.Add("@Grade", OleDbType.VarWChar, 50, "Grade")
                            .UpdateCommand.Parameters.Add("@regiment", OleDbType.VarWChar, 50, "regiment")
                            .UpdateCommand.Parameters.Add("@entreele", OleDbType.VarWChar, 50, "entreele")
                            .UpdateCommand.Parameters.Add("@contingent", OleDbType.VarWChar, 50, "contingent")
                            .UpdateCommand.Parameters.Add("@sortiele", OleDbType.VarWChar, 50, "sortiele")
                            .UpdateCommand.Parameters.Add("@mail", OleDbType.VarWChar, 50, "mail")
                            .UpdateCommand.Parameters.Add("@profession", OleDbType.VarWChar, 50, "profession")
                            .UpdateCommand.Parameters.Add("@ville", OleDbType.VarWChar, 50, "ville")
                            .UpdateCommand.Parameters.Add("@CodePostal", OleDbType.VarWChar, 50, "codepostal")
                            .UpdateCommand.Parameters.Add("@photos_membre", OleDbType.Binary, 0, "photos_membre")
                            .UpdateCommand.Parameters.Add("@observation", OleDbType.VarWChar, 50, "observation")
 
                            .UpdateCommand.Parameters.Add(New System.Data.OleDb.OleDbParameter("@ID_Membre_Syntax", System.Data.OleDb.OleDbType.VarWChar, 50, _
                                                                                 System.Data.ParameterDirection.Input, False, _
                                                                        CType(0, Byte), CType(0, Byte), "ID_Membre", _
                                                             DataRowVersion.Original, True))
                        End With
 
 
                        DtaSet2.Clear()
                        OleDa.Fill(DtaSet2, "registre")
                        Me.Identification.DataBindings.Add(New Binding("Text", DtaSet2, "registre.ID_membre", True))
                        Me.TxtNom.DataBindings.Add(New Binding("Text", DtaSet2, "registre.Nom", True))
                        Me.TxtPrenom.DataBindings.Add(New Binding("Text", DtaSet2, "registre.Prenom", True))
                        Me.TxtGrade.DataBindings.Add(New Binding("Text", DtaSet2, "registre.Grade", True))
                        Me.CBRegiment.DataBindings.Add(New Binding("Text", DtaSet2, "registre.regiment", True))
                        Me.DTEntrele.DataBindings.Add(New Binding("Text", DtaSet2, "registre.entreele", True))
                        Me.DTSortiele.DataBindings.Add(New Binding("Text", DtaSet2, "registre.sortiele", True))
                        Me.TxtContingent.DataBindings.Add(New Binding("Text", DtaSet2, "registre.contingent", True))
                        Me.TxtEmail.DataBindings.Add(New Binding("Text", DtaSet2, "registre.mail", True))
                        Me.TxtProfession.DataBindings.Add(New Binding("Text", DtaSet2, "registre.profession", True))
                        Me.TxtVille.DataBindings.Add(New Binding("Text", DtaSet2, "registre.ville", True))
                        Me.TxtCP.DataBindings.Add(New Binding("Text", DtaSet2, "registre.codepostal", True))
                        Me.TxtObservation.DataBindings.Add(New Binding("Text", DtaSet2, "registre.observation", True))
                        Main = FrmMain
                        Me.PicStudent.Image = FrmMain.PictureBox1.Image
                    End If
                End With
            Catch ex As Exception
                MsgBox(ex.Message(), MsgBoxStyle.Critical, "Erreur...")
            Finally
                OleCn.Close()
 
            End Try
            Exit Sub
        End If
 
    End Sub
 
    'Private Function RequiredEntry() As Boolean
    '    If Identification.Text = "" Or TxtNom.Text = "" Or TxtPrenom.Text = "" Or _
    '         TxtGrade.Text = "" Or TxtContingent.Text = "" Or TxtEmail.Text = "" Or TxtProfession.Text = "" Or _
    '            TxtVille.Text = "" Or TxtCP.Text = "" = True Then
    '        MsgBox("Il manque Des informations ....", MsgBoxStyle.Critical, "Attention...")
    '        Return True
    '        Exit Function
    '    End If
    'End Function
 
    Private Sub BSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BSave.Click
 
        Main = FrmMain
        If FormState = Form_State.Add_RecordState Then
            '   If RequiredEntry() = True Then
            ' Return
            ' End If
            Try
 
                Dim DtaRow As DataRow
 
                Dim MemStream As New MemoryStream
                Dim DataPic_Insert As Byte()
 
                DtaRow = DtaSet.Tables("registre").NewRow
 
                With DtaRow
                    .Item("ID_Membre") = IIf(Identification.Text = "", System.DBNull.Value, Identification.Text)
                    .Item("Nom") = IIf(TxtNom.Text = "", System.DBNull.Value, TxtNom.Text)
                    .Item("Prenom") = IIf(TxtPrenom.Text = "", System.DBNull.Value, TxtPrenom.Text)
                    .Item("Grade") = IIf(TxtGrade.Text = "", System.DBNull.Value, TxtGrade.Text)
                    .Item("regiment") = IIf(CBRegiment.Text = "", System.DBNull.Value, CBRegiment.Text)
                    .Item("entreele") = IIf(DTEntrele.Text = "", System.DBNull.Value, DTEntrele.Text)
                    .Item("contingent") = IIf(TxtContingent.Text = "", System.DBNull.Value, TxtContingent.Text)
                    .Item("sortiele") = IIf(DTSortiele.Text = "", System.DBNull.Value, DTSortiele.Text)
                    .Item("mail") = IIf(TxtEmail.Text = "", System.DBNull.Value, TxtEmail.Text)
                    .Item("profession") = IIf(TxtProfession.Text = "", System.DBNull.Value, TxtProfession.Text)
                    .Item("ville") = IIf(TxtVille.Text = "", System.DBNull.Value, TxtVille.Text)
                    .Item("codepostal") = IIf(TxtCP.Text = "", System.DBNull.Value, TxtCP.Text)
                    .Item("observation") = IIf(TxtObservation.Text = "", System.DBNull.Value, TxtObservation.Text)
 
                    Me.PicStudent.Image.Save(MemStream, Imaging.ImageFormat.Jpeg)
                    DataPic_Insert = MemStream.GetBuffer()
                    MemStream.Read(DataPic_Insert, 0, MemStream.Length)
 
                    .Item("photos_membre") = DataPic_Insert
                End With
 
                DtaSet.Tables("registre").Rows.Add(DtaRow)
 
                OleDa.Update(DtaSet, "registre")
                DtaSet.AcceptChanges()
 
 
                With Main
                    .BindingContext.Item(DtaSet, "registre").Position = Main.BindingContext.Item(DtaSet, "registre").Count - 1
                    Call .Navigation()
                End With
 
                MsgBox("Enregistrement Avec Succés...", MsgBoxStyle.Information, "Enregistrement Reussi...")
                If MsgBox("Ajouter un Nouveau Membre?", MsgBoxStyle.Question + MsgBoxStyle.YesNo, "Confirmation...") = MsgBoxResult.Yes Then
                    Me.FormState = Form_State.Add_RecordState
                    Call ResetEntry()
                    Identification.Focus()
                    Exit Sub
                End If
                Me.Close()
 
            Catch ex As Exception
                MsgBox(ex.Message(), MsgBoxStyle.Exclamation, "Désolé, impossible de sauvegarder...")
 
 
                Identification.Focus()
                Identification.SelectAll()
                DtaSet.RejectChanges()
            End Try
            Exit Sub
        End If
 
        If FormState = Form_State.Edit_RecordState Then
            '  If RequiredEntry() = True Then
            ' Return
            'End If
            Try
 
                Dim MemStream As New MemoryStream
                Dim DataPic_Update As Byte()
 
                With DtaSet2
                    .Tables("registre").Rows(0).Item("ID_Membre") = IIf(Identification.Text = "", System.DBNull.Value, Identification.Text)
                    .Tables("registre").Rows(0).Item("Nom") = IIf(TxtNom.Text = "", System.DBNull.Value, TxtNom.Text)
                    .Tables("registre").Rows(0).Item("Prenom") = IIf(TxtPrenom.Text = "", System.DBNull.Value, TxtPrenom.Text)
                    .Tables("registre").Rows(0).Item("Grade") = IIf(TxtGrade.Text = "", System.DBNull.Value, TxtGrade.Text)
                    .Tables("registre").Rows(0).Item("regiment") = IIf(CBRegiment.Text = "", System.DBNull.Value, CBRegiment.Text)
                    .Tables("registre").Rows(0).Item("entreele") = IIf(DTEntrele.Text = "", System.DBNull.Value, DTEntrele.Text)
                    .Tables("registre").Rows(0).Item("contingent") = IIf(TxtContingent.Text = "", System.DBNull.Value, TxtContingent.Text)
                    .Tables("registre").Rows(0).Item("sortiele") = IIf(DTSortiele.Text = "", System.DBNull.Value, DTSortiele.Text)
                    .Tables("registre").Rows(0).Item("mail") = IIf(TxtEmail.Text = "", System.DBNull.Value, TxtEmail.Text)
                    .Tables("registre").Rows(0).Item("profession") = IIf(TxtProfession.Text = "", System.DBNull.Value, TxtProfession.Text)
                    .Tables("registre").Rows(0).Item("ville") = IIf(TxtVille.Text = "", System.DBNull.Value, TxtVille.Text)
                    .Tables("registre").Rows(0).Item("codepostal") = IIf(TxtCP.Text = "", System.DBNull.Value, TxtCP.Text)
                    .Tables("registre").Rows(0).Item("observation") = IIf(TxtObservation.Text = "", System.DBNull.Value, TxtObservation.Text)
 
                    Me.PicStudent.Image.Save(MemStream, Imaging.ImageFormat.Jpeg)
                    DataPic_Update = MemStream.GetBuffer()
                    MemStream.Read(DataPic_Update, 0, MemStream.Length)
 
                    .Tables("registre").Rows(0).Item("photos_membre") = DataPic_Update
 
                End With
 
 
                BindingContext(DtaSet2, "registre").EndCurrentEdit()
                If DtaSet2.HasChanges() Then
                    OleDa.Update(DtaSet2, "registre")
                    DtaSet2.AcceptChanges()
                End If
 
                With Main
                    With .DgV
                        .SelectedRows(0).Cells(0).Value = Me.Identification.Text
                        .SelectedRows(0).Cells(1).Value = Me.TxtNom.Text
                        .SelectedRows(0).Cells(2).Value = Me.TxtPrenom.Text
                        .SelectedRows(0).Cells(3).Value = Me.TxtGrade.Text
                        .SelectedRows(0).Cells(4).Value = Me.CBRegiment.Text
                        .SelectedRows(0).Cells(5).Value = Me.TxtContingent.Text
                        .SelectedRows(0).Cells(6).Value = Me.DTEntrele.Text
                        .SelectedRows(0).Cells(7).Value = Me.DTSortiele.Text
                        .SelectedRows(0).Cells(8).Value = Me.TxtEmail.Text
                        .SelectedRows(0).Cells(9).Value = Me.TxtProfession.Text
                        .SelectedRows(0).Cells(10).Value = Me.TxtVille.Text
                        .SelectedRows(0).Cells(11).Value = Me.TxtCP.Text
                        .SelectedRows(0).Cells(12).Value = Me.TxtObservation.Text
 
                    End With
                    .PictureBox1.Image = Me.PicStudent.Image
                End With
 
                MsgBox("Mise à jours réussie...", MsgBoxStyle.Information, "Enregistrement Mis à jours...")
            Catch ex As Exception
 
                MsgBox(ex.Message, MsgBoxStyle.Exclamation, "Désolé, impossible de mettre à jours ...")
 
                Me.Identification.Text = Main.DgV.SelectedRows(0).Cells(0).Value
            End Try
            Exit Sub
        End If
    End Sub
    Private Sub BBrowse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BBrowse.Click
        Dim OpenFile As New OpenFileDialog()
        Try
            With OpenFile
                .FileName = ""
                .Title = "Photo:"
                .Filter = "Image files: (*.jpg)|*.jpg|(*.jpeg)|*.jpeg|(*.png)|*.png|(*.Gif)|*.Gif|(*.bmp)|*.bmp| All Files (*.*)|*.*"
                If .ShowDialog = Windows.Forms.DialogResult.OK Then
                    Me.PicStudent.Image = System.Drawing.Image.FromFile(.FileName)
 
                Else
 
                End If
            End With
        Catch ex As Exception
            MsgBox(ex.Message(), MsgBoxStyle.Critical, "Error...")
        End Try
    End Sub
    Private Sub BStartCamera_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BStartCamera.Click
        FrmCamera.ShowDialog()
    End Sub
    Private Sub BRemove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BRemove.Click
        Call ImageSyntax()
    End Sub
    Private Sub ImageSyntax()
        Me.PicStudent.Image = System.Drawing.Image.FromFile(My.Application.Info.DirectoryPath & "\ImageSyntax\NoImage.JPG")
    End Sub
    Private Sub regimentItem()
        With CBRegiment
            .Items.Clear()
            .Items.Add("46 éme Régiment d’infanterie")
            .Items.Add("11 ème  Régiment de Chasseurs")
            .Items.Add("110 ème Compagnie de Genie")
            .Items.Add("357 ème Hopital des Armées Louis Pasteur")
            .Items.Add("501 ème EMSH Etablissement Mixte des Subsistances et Habillement")
            .Items.Add("DTCB (Direction des Transports et de la Circulation")
            .Items.Add("GS - Groupement de Service")
            .Items.Add("DTMVF -Direction des Transports Militaires par Voie Ferrée")
            .Items.Add("ESCADRON de SECURITE puis CEG - Compagnie d’élèves Gendarmes")
            .Items.Add("QG (Quartier Général")
            .Items.Add("11 ème Compagnie de Transmissions")
            .Items.Add("BPM 600")
            .Items.Add("BA 165")
            .Items.Add("728 ème Compagnie de Transmissions")
            .Items.Add("GMSH 300")
            .Items.Add("Famille de militaires ayant vecu à Berlin")
 
        End With
    End Sub
    Private Sub CapsLock()
        Me.Identification.CharacterCasing = CharacterCasing.Upper
        Me.TxtNom.CharacterCasing = CharacterCasing.Upper
        Me.TxtPrenom.CharacterCasing = CharacterCasing.Upper
        Me.TxtGrade.CharacterCasing = CharacterCasing.Upper
        Me.TxtContingent.CharacterCasing = CharacterCasing.Upper
        Me.TxtEmail.CharacterCasing = CharacterCasing.Upper
        Me.TxtProfession.CharacterCasing = CharacterCasing.Upper
        Me.TxtVille.CharacterCasing = CharacterCasing.Upper
        Me.TxtCP.CharacterCasing = CharacterCasing.Upper
        Me.TxtObservation.CharacterCasing = CharacterCasing.Upper
    End Sub
    Private Sub ResetEntry()
 
        Call ImageSyntax()
        Me.Identification.Text = ""
        Me.TxtNom.Text = ""
        Me.TxtPrenom.Text = ""
        Me.TxtGrade.Text = ""
        Call regimentItem()
        Me.TxtContingent.Text = ""
        Me.DTEntrele.ResetText()
        Me.DTSortiele.ResetText()
        Me.TxtEmail.Text = ""
        Me.TxtProfession.Text = ""
        Me.TxtVille.Text = ""
        Me.TxtCP.Text = ""
        Me.TxtObservation.Text = ""
 
    End Sub
 
    Private Sub ContextMnu()
        Dim Context As New ContextMenuStrip()
        Me.Identification.ContextMenuStrip = Context
        Me.TxtNom.ContextMenuStrip = Context
        Me.TxtPrenom.ContextMenuStrip = Context
        Me.TxtGrade.ContextMenuStrip = Context
        Me.TxtContingent.ContextMenuStrip = Context
        Me.DTEntrele.ContextMenuStrip = Context
        Me.DTSortiele.ContextMenuStrip = Context
        Me.TxtEmail.ContextMenuStrip = Context
        Me.TxtProfession.ContextMenuStrip = Context
        Me.TxtVille.ContextMenuStrip = Context
        Me.TxtCP.ContextMenuStrip = Context
        Me.TxtObservation.ContextMenuStrip = Context
    End Sub
 
    Private Sub FrmEntry_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
        e.SuppressKeyPress = e.Control
    End Sub
    Private Sub FrmEntry_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        Me.Dispose()
    End Sub
 
    Private Sub BCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BCancel.Click
        Me.Close()
    End Sub
 
    Private Sub Identification_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Identification.KeyPress
        Dim NotAllowedSpace As String = " "
        Dim NotAllowed As String = "`~!@#$%^&*()-_=+[{[};:'\| <,>.?/"
 
        'Allowed numbers and letters only...
 
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
        If e.KeyChar <> ControlChars.Back Then
            If NotAllowedSpace.IndexOf(e.KeyChar) = False Then
                e.Handled = True
                Exit Sub
            End If
        End If
    End Sub
    Private Sub TxtNom_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtNom.KeyPress
        Dim NotAllowed As String = "1234567890~`@#$%^&*()_-+={[}]:;'.><?/|\"
 
        'Allowed Letters only
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
 
    Private Sub TxtPrenom_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtPrenom.KeyPress
        Dim NotAllowed As String = "1234567890~`@#$%^&*()_+={[}]:;'.><?/|\"
 
        'Allowed Letters only
 
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
    Private Sub TxtGrade_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtGrade.KeyPress
        Dim NotAllowed As String = "~`@$%^&*+={[}]:;'><?/|\"
        'Allowed letters and numbers
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
    Private Sub TxtContingent_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtContingent.KeyPress
        Dim NotAllowed As String = "~`@$%^&*+={[}]():;'><?|\"
        'Allowed letters and numbers
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
    'Private Sub TxtEmail_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtEmail.KeyPress
    '    Dim NotAllowed As String = "~`$%^&*+={[}]():;'><?/|\"
    '    'Allowed letters and numbers
    '    If e.KeyChar <> ControlChars.Back = True Then
    '        If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
    '            e.Handled = True
    '        End If
    '    End If
    'End Sub
 
    Private Sub TxtEmail_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles TxtEmail.Validating
        Dim email As String = TxtEmail.Text
        If EmailAddressCheck(email) = False Then
 
            Dim result As DialogResult _
            = MessageBox.Show("Adresse Email Invalide." & _
                                       " Voulez Vous en entrer une nouvelle?", " Email Addresse Invalide", _
                                       MessageBoxButtons.YesNo, MessageBoxIcon.Error)
            If result = Windows.Forms.DialogResult.Yes Then
                e.Cancel = True
            End If
 
        End If
 
 
    End Sub
 
 
    Function EmailAddressCheck(ByVal emailAddress As String) As Boolean
        Dim pattern As String = "^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]" & _
        "*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$"
        Dim emailAddressMatch As Match = Regex.Match(emailAddress, pattern)
        If emailAddressMatch.Success Then
            EmailAddressCheck = True
 
        Else
            EmailAddressCheck = False
 
        End If
    End Function
 
    Private Sub TxtProfession_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtProfession.KeyPress
        Dim NotAllowed As String = "~`@$%^&*_+={[}]:;'()>-<?/|\"
 
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
 
    Private Sub TxtVille_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtVille.KeyPress
        Dim NotAllowed As String = "~`@$%^&*+={[}]():;'><?/|\"
        'Allowed letters and numbers
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
 
    Private Sub TxtCP_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtCP.KeyPress
        Dim NotAllowed As String = "~`@$%^&*+={[}]():;'><?/|\"
        'Allowed letters and numbers
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
 
    Private Sub TxtObservation_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtObservation.KeyPress
        Dim NotAllowed As String = "~`@$%^&*+={[}]():;'><?/|\"
        'Allowed(letters And numbers)
        If e.KeyChar <> ControlChars.Back = True Then
            If NotAllowed.IndexOf(e.KeyChar) = -1 = False Then
                e.Handled = True
            End If
        End If
    End Sub
 
 
End Class
la connection avec la bdd se fait bien mais dés que je veux créer un nouveau membre, ca bug avec la fameuse erreur !!! . Je peche dessus depuis 2 jours mais pas moyen de voir ou vient cette erreur que j'ai comprise (il n'arrive pas a convertir un string en byte)

Merci d'avance pour l'aide.