private void DisableControls(ListControl control, Boolean val)
    {
        if (val)
        {
            control.ClearSelection();
            control.Attributes.Remove("checked");
            control.Attributes.Add("disabled", "disabled");
        }
        else
        {
            control.Attributes.Remove("disabled");
        }
    }

private void DisableControls(ListControl control, Boolean val)
    {
        if (val)
        {
            control.ClearSelection();
            foreach (ListItem item in control.Items)
            {
                item.Enabled = false;
            }
        }
        else
        {
            foreach (ListItem item in control.Items)
            {
                item.Enabled = true;
            }
        }
    }

private void DisableControls(ListControl control, Boolean val)
    {
        if (val)
        {
            control.ClearSelection();
           control.Enabled = false;
        }
        else
        {
          control.Enabled = true;
        }
    }