private void buttonAddCamera_Click(object sender, EventArgs e)
{
if (advTreeVideoSupplier.SelectedNode != null)
{
FormAddEditCamera f = new FormAddEditCamera();
f.VideoSupplierId = Convert.ToUInt32(advTreeVideoSupplier.SelectedNode.Cells[0].Text);
f.VideoSupplierNmae = advTreeVideoSupplier.SelectedNode.Cells[1].Text;
f.ShowDialog();
m_viewModel.FlushCameraList();
advTreeCamera.DataSource = m_viewModel.GetCameraListByVideoSupplierID(f.VideoSupplierId);
}
}