/// <summary>
/// Prompts the user to select an item and specify trend properties.
/// </summary>
public TsCHdaAnnotationValueCollection ShowDialog(TsCHdaServer server, bool synchronous)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
m_server = server;
m_singleItem = true;
m_synchronous = synchronous;
m_results = null;
// create new trend.
m_trend = new TsCHdaTrend(m_server);
// set reasonable defaults.
m_trend.StartTime = new TsCHdaTime("YEAR");
m_trend.EndTime = new TsCHdaTime("YEAR+1H");
BrowseCTRL.Browse(m_server, null);
TrendItemsCTRL.Initialize(m_trend, false, null);
TrendCTRL.Initialize(m_trend, RequestType.ReadAnnotations);
ItemsCTRL.Initialize(null);
ResultsCTRL.Initialize(m_server, null);
AsyncResultsCTRL.Initialize(m_server, null);
// update dialog state.
SetState();
// show dialog.
bool result = (ShowDialog() == DialogResult.OK);
// release item handles.
m_trend.ClearItems();
// return item values.
return((result)?m_results[0]:null);
}
/// <summary>
/// Prompts the user to specify values to insert for an item.
/// </summary>
public bool ShowDialog(TsCHdaServer server, OpcItem item, bool synchronous)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
m_server = server;
m_synchronous = synchronous;
m_item = item;
m_values = null;
m_results = null;
// create new trend.
m_trend = new TsCHdaTrend(m_server);
// set reasonable defaults.
m_trend.StartTime = new TsCHdaTime("YEAR");
m_trend.EndTime = new TsCHdaTime("YEAR+1H");
BrowseCTRL.Browse(m_server, null);
ValuesCTRL.Initialize(m_server, null);
ResultsCTRL.Initialize(m_server, m_values, m_results);
AsyncResultsCTRL.Initialize(m_server, null);
// update dialog state.
SetState();
// show dialog.
bool result = (ShowDialog() == DialogResult.OK);
// release item handles.
m_trend.ClearItems();
// return dialog result.
return(result);
}