/// <summary>
/// Prompts the user to select an item and specify trend properties.
/// </summary>
public TsCHdaItemValueCollection ShowDialog(TsCHdaServer server, RequestType type, bool synchronous)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
mServer_ = server;
mType_ = type;
mSynchronous_ = synchronous;
mSingleItem_ = true;
mResults_ = null;
// create new trend.
mTrend_ = new TsCHdaTrend(mServer_);
// set reasonable defaults.
mTrend_.StartTime = new TsCHdaTime("YEAR");
mTrend_.EndTime = new TsCHdaTime("YEAR+1H");
browseCtrl_.Browse(mServer_, null);
trendItemsCtrl_.Initialize(mTrend_, false, null);
trendCtrl_.Initialize(mTrend_, type);
itemsCtrl_.Initialize(null);
resultsCtrl_.Initialize(mServer_, null);
asyncResultsCtrl_.Initialize(mServer_, null);
// update dialog state.
SetState();
// show dialog.
bool result = (ShowDialog() == DialogResult.OK);
// release item handles.
mTrend_.ClearItems();
// return item values.
return((result)?mResults_[0]:null);
}
/// <summary>
/// Prompts the user to specified values to replace.
/// </summary>
public bool ShowDialog(TsCHdaServer server, OpcItem item, bool synchronous)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
mServer_ = server;
mSynchronous_ = synchronous;
mItem_ = item;
mValues_ = null;
mResults_ = null;
// create new trend.
mTrend_ = new TsCHdaTrend(mServer_);
// set reasonable defaults.
mTrend_.StartTime = new TsCHdaTime("YEAR");
mTrend_.EndTime = new TsCHdaTime("YEAR+1H");
browseCtrl_.Browse(mServer_, null);
trendCtrl_.Initialize(mTrend_, RequestType.ReadRaw);
valuesCtrl_.Initialize(mServer_, null);
asyncResultsCtrl_.Initialize(mServer_, null);
resultsCtrl_.Initialize(mServer_, null);
// update dialog state.
SetState();
// show dialog.
bool result = (ShowDialog() == DialogResult.OK);
// release item handles.
mTrend_.ClearItems();
// return item values.
return(result);
}
/// <summary>
/// Called to disconnect from a server.
/// </summary>
public void OnDisconnect()
{
// disconnect server.
if (server_ != null)
{
try { server_.Disconnect(); }
catch {}
server_.Dispose();
server_ = null;
}
// clear cache.
cache_ = new Hashtable();
// initialize controls.
statusCtrl_.Start(null);
trendsCtrl_.Initialize(null);
valuesCtrl_.Initialize(null, null);
outputCtrl_.Text = "";
}