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    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        DropDownListCouleurLego.Items.Clear()
        DropDownListCouleurPeeron.Items.Clear()
        Dim ConnectionDB As MySqlConnection = New MySqlConnection(StringDB)
        Try
            ConnectionDB.Open()
            Dim requetteCouleurLego As String = "SELECT couleur_lego FROM couleur_lego"
            Dim requetteur As MySqlCommand = New MySqlCommand(requetteCouleurLego, ConnectionDB)
            Dim ResultatRequette As MySqlDataReader = requetteur.ExecuteReader()
            While ResultatRequette.Read() = True
                DropDownListCouleurLego.Items.Add(ResultatRequette.GetString(0))
            End While
            ResultatRequette.Close()
            Dim requetteCouleurPeeron As String = "SELECT couleur_peeron FROM couleur_peeron"
            requetteur = New MySqlCommand(requetteCouleurPeeron, ConnectionDB)
            ResultatRequette = requetteur.ExecuteReader()
            While ResultatRequette.Read() = True
                DropDownListCouleurPeeron.Items.Add(ResultatRequette.GetString(0))
            End While
            requetteur.Dispose()
            ConnectionDB.Close()
        Catch ex As MySqlException
 
 
        End Try
 
        ConnectionDB.Dispose()
        AssocierDropDownListCouleurLegoPeeron()
    End Sub
 
    Protected Sub ButtonPreVisualisationImage_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonPreVisualisationImage.Click
        FileUploadImage.SaveAs(Server.MapPath("./images_temp/" & TextBoxRefLego.Text & ".jpg"))
        ImagePrevi.ImageUrl = "~/images_temp/" & TextBoxRefLego.Text & ".jpg"
    End Sub
 
    Protected Sub DropDownListCouleurLego_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles DropDownListCouleurLego.SelectedIndexChanged
        AssocierDropDownListCouleurLegoPeeron()
        UpdatePanel2.Update()
    End Sub
 
    Private Sub AssocierDropDownListCouleurLegoPeeron()
        Dim ConnectionDB As MySqlConnection = New MySqlConnection(StringDB)
        Try
            ConnectionDB.Open()
            Dim requetteIdCouleurLego As String = "SELECT id_couleur_lego FROM couleur_lego WHERE couleur_lego='" & DropDownListCouleurLego.SelectedItem.Text & "'"
            Dim requetteur As MySqlCommand = New MySqlCommand(requetteIdCouleurLego, ConnectionDB)
            Dim ResultatRequette As MySqlDataReader = requetteur.ExecuteReader()
            ResultatRequette.Read()
            Dim id_couleur_lego As Integer = ResultatRequette.GetInt32(0)
            ResultatRequette.Close()
 
            Dim requetteAssociationCouleur As String = "SELECT id_couleur_peeron FROM associer_clego_cpeeron WHERE id_couleur_lego='" & id_couleur_lego & "'"
            requetteur = New MySqlCommand(requetteAssociationCouleur, ConnectionDB)
            ResultatRequette = requetteur.ExecuteReader()
            ResultatRequette.Read()
            Dim id_couleur_peeron As Integer = ResultatRequette.GetInt32(0)
            ResultatRequette.Close()
 
            Dim requetteNomCouleurPeeron As String = "SELECT couleur_peeron FROM couleur_peeron WHERE id_couleur_peeron='" & id_couleur_peeron & "'"
            requetteur = New MySqlCommand(requetteNomCouleurPeeron, ConnectionDB)
            ResultatRequette = requetteur.ExecuteReader()
            ResultatRequette.Read()
            Dim trouver As Boolean = False
            Dim indexItemListePeeron As Integer = 0
            While trouver = False
                If DropDownListCouleurPeeron.Items(indexItemListePeeron).Text = ResultatRequette.GetString(0) Then
                    trouver = True
                Else
                    indexItemListePeeron = indexItemListePeeron + 1
                End If
            End While
            DropDownListCouleurPeeron.SelectedIndex = indexItemListePeeron
            ResultatRequette.Close()
            ConnectionDB.Close()
        Catch ex As MySqlException
 
        End Try
        ConnectionDB.Dispose()
    End Sub | 
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