@if (elencoOperatori != null)
{
    <div class="d-flex justify-content-between g-1" style="flex-flow: wrap;">

        @foreach (var item in elencoOperatori)
        {
            <div class="card col-4">
                <div class="card-header list-group-item-info">
                    <span>@item.Nome @item.Cognome</span>
                </div>
                <div class="card-body text-center">
                    <div class="img-fluid" id="qrCodeImg_@item.MatrOpr"></div>
                </div>
                <div class="card-footer text-center">
                    Matricola: @item.MatrOpr
                </div>
            </div>
        }
    </div>
}