Delete ne fonctionne pas avec mon gridview

Hello,

d'abord un peu de code :
app_code\destinataire.vb

Code:

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Imports Microsoft.VisualBasic
Imports System.Collections.Generic
Public Class Destinataires
 
    Public Shared Function Liste()
        Dim ListeEmails As New List(Of Email)
 
 
        Dim emails As String = System.Web.HttpContext.Current.Session.Item("emails")
 
        For Each s As String In Split(emails, ",")
            ListeEmails.Add(New Email(s))
        Next
 
        Return ListeEmails
    End Function
 
    Public Shared Function Supprimer(ByVal Email As String)
        Dim emails As String = System.Web.HttpContext.Current.Session.Item("emails")
 
        emails = emails.Trim(Email)
        emails = emails.Replace(",,", ",")
        If emails.StartsWith(",") Then emails.Remove(0, 1)
        If emails.EndsWith(",") Then emails.Remove(emails.Length - 1, 1)
 
        System.Web.HttpContext.Current.Session.Item("emails") = emails
 
        Return emails
    End Function
 
    Public Class Email
        Sub New(ByVal _email As String)
            Me.email = _email
        End Sub
 
        Private _email As String
        Public Property email() As String
            Get
                Return _email
            End Get
            Set(ByVal value As String)
                _email = value
            End Set
        End Property
    End Class
End Class

default2.aspx

Code:

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<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Page sans titre</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBoxAjoutDestinataire" runat="server"></asp:TextBox><asp:Button
            ID="Button1" runat="server" Text="Ajouter" /><asp:GridView ID="GridView1" runat="server"
                AutoGenerateColumns="False" DataSourceID="ObjectDataSource1">
                <Columns>
                    <asp:TemplateField ShowHeader="False">
                        <ItemTemplate>
                            <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandArgument='<%# Eval("email") %>'
                                CommandName="Delete" Text="Supprimer"></asp:LinkButton>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:BoundField DataField="email" />
                </Columns>
            </asp:GridView>
        <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" DeleteMethod="Supprimer"
            SelectMethod="Liste" TypeName="Destinataires">
            <DeleteParameters>
                <asp:Parameter Name="Email" Type="String" />
            </DeleteParameters>
        </asp:ObjectDataSource>
 
    </div>
    </form>
</body>
</html>

default2.aspx.vb

Code:

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Partial Class Default2
    Inherits System.Web.UI.Page
 
    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        If Session.Item("emails") = "" Then
            Session.Item("emails") = TextBoxAjoutDestinataire.Text
        Else
            Session.Item("emails") = Session.Item("emails") & "," & TextBoxAjoutDestinataire.Text
        End If
 
        TextBoxAjoutDestinataire.Text = ""
        GridView1.DataBind()
    End Sub
End Class

en gros, je veux pouvoir ajouter des emails dans une gridview dont le contenu est stocké dans une variable de session.

pour le moment je n'arrive pas à supprimer car l'email à supprimer ne passe pas dans la function supprimer.

Si quelqu'un peut m'aider ?

merci