/// <summary>
/// Called when an asynchronous read request completes.
/// </summary>
private void OnReadComplete(object clientHandle, OpcDa::ItemValueResult[] results)
{
try
{
if (InvokeRequired)
{
BeginInvoke(new OpcDa::ReadCompleteEventHandler(OnReadComplete), new object[] { clientHandle, results });
return;
}
if (!m_handle.Equals(clientHandle))
{
return;
}
ResultsCTRL.Initialize(m_subscription.Server, null, results);
m_request = null;
m_results = results;
OkBTN.Enabled = true;
CancelBTN.Enabled = true;
GoBTN.Visible = true;
StopBTN.Visible = false;
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
/// <summary>
/// Executes a read request for the current set if items.
/// </summary>
private void DoRead()
{
try
{
// read from server.
OpcDa::Item[] items = ItemsCTRL.GetItems();
if (items.Length == 0)
{
return;
}
OpcDa::ItemValueResult[] results = null;
if (m_subscription != null)
{
if (m_synchronous)
{
results = m_subscription.Read(items);
}
else
{
results = new AsyncRequestDlg().ShowDialog(m_subscription, items);
if (results == null)
{
return;
}
}
}
else
{
// add dummy client handles to test that they get returned properly.
foreach (OpcDa::Item item in items)
{
item.ClientHandle = item.ItemName;
}
results = m_server.Read(items);
}
// save results.
m_values = results;
BackBTN.Enabled = true;
NextBTN.Enabled = false;
CancelBTN.Visible = false;
DoneBTN.Visible = true;
OptionsBTN.Visible = false;
ItemsCTRL.Visible = false;
ResultsCTRL.Visible = true;
// display results.
ResultsCTRL.Initialize(m_server, (m_subscription != null) ? m_subscription.Locale : m_server.Locale, results);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
/// <summary>
/// Executes a write request for the current set if items.
/// </summary>
private void DoWrite()
{
try
{
// get the selected items
OpcDa::ItemValue[] items = ItemsCTRL.GetItems();
// write to server.
Opc.IdentifiedResult[] results = null;
if (m_subscription != null)
{
if (m_synchronous)
{
results = m_subscription.Write(items);
}
else
{
results = new AsyncRequestDlg().ShowDialog(m_subscription, items);
if (results == null)
{
return;
}
}
}
else
{
// add dummy client handles to test that they get returned properly.
foreach (OpcDa::ItemValue item in items)
{
item.ClientHandle = item.ItemName;
}
results = m_server.Write(items);
}
// create a list of item value results.
ArrayList values = new ArrayList();
for (int ii = 0; ii < items.Length; ii++)
{
OpcDa::ItemValueResult value = new OpcDa::ItemValueResult(items[ii]);
value.ItemName = results[ii].ItemName;
value.ItemPath = results[ii].ItemPath;
value.ClientHandle = results[ii].ClientHandle;
value.ServerHandle = results[ii].ServerHandle;
value.ResultID = results[ii].ResultID;
value.DiagnosticInfo = results[ii].DiagnosticInfo;
values.Add(value);
}
// save results.
m_values = (OpcDa::ItemValueResult[])values.ToArray(typeof(OpcDa::ItemValueResult));
BackBTN.Enabled = true;
NextBTN.Enabled = false;
CancelBTN.Visible = false;
DoneBTN.Visible = true;
OptionsBTN.Visible = false;
ItemsCTRL.Visible = false;
ResultsCTRL.Visible = true;
// display results.
ResultsCTRL.Initialize(m_server, (m_subscription != null) ? m_subscription.Locale : m_server.Locale, m_values);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}