是不同的用户访问不同的页面，根据他们的角色

protected void Login1_LoggedIn(object sender, EventArgs e)
{
    {
             if (Roles.IsUserInRole(Login1.UserName, "Admin"))
            Response.Redirect("~/Admin/Default.aspx");
        else if (Roles.IsUserInRole(Login1.UserName, "User"))
            Response.Redirect("~/User/Default.aspx");
    }
}

protected void Login1_Authenticate(object sender, AuthenticateEventArgs e)
    {
        if (Membership.ValidateUser(Login1.UserName, Login1.Password))
        {
            if (Roles.IsUserInRole(Login1.UserName, "Admin"))
            {
               Response.Redirect("~/Admin/Default.aspx");
            }
            else if (Roles.IsUserInRole(Login1.UserName, "User"))
            {
               Response.Redirect("~/User/Default.aspx");
            }               
        }
    }