protected void cambia_select(object sender, EventArgs e)
    {//Cambiamo la select per la seconda dropdown
        SqlDataSource7.SelectCommand = "SELECT DISTINCT " + scelta.SelectedValue + " as Expr1 FROM progetti";
        DropDownList9.DataBind();
        //Lo cambiamo per la gridview
        SqlDataSource1.SelectCommand = "SELECT [stato], [tipologia] FROM [progetti] WHERE ([" + scelta.SelectedValue + "] = @valore)";
        GridView1.DataBind();
    }
    protected void Drop2IndexChanged(object sender, EventArgs e)
    {
        SqlDataSource1.SelectCommand = "SELECT [stato], [tipologia] FROM [progetti] WHERE ([" + scelta.SelectedValue + "] = @valore)";
        GridView1.DataBind();
        }