void OnWriteDataClick(object sender, EventArgs e)
{
NodeData data = (NodeData)(sender as ToolStripItem).Tag;
NodeData newdata = Iec61850Controller.PrepareWriteData(data);
EditValue ev = new EditValue(newdata);
ev.HideUpdateTimestamp();
DialogResult r = ev.ShowDialog();
if (r == DialogResult.OK)
{
data.DataValue = newdata.DataValue;
ctrl.WriteData(data, true);
}
}