private void button3_Click(object sender, EventArgs e)
{
if (comboBox1.SelectedItem != null)
{
DeviceItem item = (DeviceItem)comboBox1.SelectedItem;
DeviceListener.Device d = deviceListener.Find(item.id);
if (d != null)
{
int ret = deviceListener.SDCardGetInfo(d, out string disk_size, out string free_size);
if (ret == 0)
{
label4.Text = disk_size;
label5.Text = free_size;
}
}
}
}