.NET2 - UTILISATION DES VALIDATIONGROUP

'Login.ascx :
'---------------------------------------------------------------------------------------

<%@ Control Language="VB" AutoEventWireup="false" CodeFile="Login.ascx.vb" Inherits="UC_Login" %>
<asp:Panel ID="PanelLogin" runat="server" GroupingText="Identifiez vous" DefaultButton="ButtonLoginValid" CssClass="Login">
    <asp:Label ID="LabelName" runat="server" Text="Nom :" AssociatedControlID="TextBoxName"></asp:Label>
    <asp:TextBox ID="TextBoxName" runat="server" ValidationGroup="Login"></asp:TextBox>
    <asp:RequiredFieldValidator ID="RequiredFieldValidatorName" runat="server" ErrorMessage="*" ControlToValidate="TextBoxName" Display="Dynamic" SetFocusOnError="True" ValidationGroup="Login"></asp:RequiredFieldValidator><br />
    <asp:Label ID="LabelPassword" runat="server" Text="Password :" AssociatedControlID="TextBoxPassword"></asp:Label>
    <asp:TextBox ID="TextBoxPassword" runat="server" EnableViewState="False" TextMode="Password" ValidationGroup="Login"></asp:TextBox>
    <asp:RequiredFieldValidator ID="RequiredFieldValidatorPassword" runat="server" ErrorMessage="*" ControlToValidate="TextBoxPassword" Display="Dynamic" SetFocusOnError="True" ValidationGroup="Login"></asp:RequiredFieldValidator><br />
    <asp:Button ID="ButtonLoginValid" CssClass="Button" runat="server" Text="Valider" ValidationGroup="Login" /></asp:Panel>
<asp:Literal ID="LiteralResult" runat="server" EnableViewState="False"></asp:Literal>

'Login.ascx.vb 
'---------------------------------------------------------------------------------------

Partial Class UC_Login
    Inherits System.Web.UI.UserControl

    Protected Sub ButtonLoginValid_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles ButtonLoginValid.Click
        Page.Validate("Login")
        If Page.IsValid Then
            'Faudra bien sur vérifier tout ca dans une bdd etc ...
            If TextBoxName.Text = "Cyril" AndAlso TextBoxPassword.Text = "toto" Then
                Me.PanelLogin.Visible = False
                Me.LiteralResult.Text = "Authentification réussie"
            Else
                Me.LiteralResult.Text = "Nom d'utilisateur ou mot de passe incorrect"
            End If
        End If
    End Sub
End Class

'le fichier CSS 
'---------------------------------------------------------------------------------------
div.Login fieldset {width:290px;margin:auto;position:relative;}
div.Login fieldset label {text-align:right;width:70px;clear:left;display:block; float:left;margin:5px;}
div.Login fieldset input {width:170px;margin:5px;}
div.Login fieldset input.Button {margin-right:25px;float:right;width:70px;}