/// <summary>
/// Initialize object with the specified IdentifiedResult object.
/// </summary>
public IdentifiedResult(IdentifiedResult item)
: base(item)
{
if (item != null)
{
ResultID = item.ResultID;
DiagnosticInfo = item.DiagnosticInfo;
}
}
/// <summary>
/// Begins an asynchronous read of a set of items using DA2.0 interfaces.
/// </summary>
private IdentifiedResult[] BeginRead(
ItemIdentifier[] itemIDs,
int requestID,
out int cancelID)
{
try
{
// marshal input parameters.
int[] serverHandles = new int[itemIDs.Length];
for (int ii = 0; ii < itemIDs.Length; ii++)
{
serverHandles[ii] = (int)itemIDs[ii].ServerHandle;
}
// initialize output parameters.
IntPtr pErrors = IntPtr.Zero;
((IOPCAsyncIO2)m_group).Read(
itemIDs.Length,
serverHandles,
requestID,
out cancelID,
out pErrors);
// unmarshal output parameters.
int[] errors = OpcDa.Client.Com.Interop.GetInt32s(ref pErrors, itemIDs.Length, true);
// create item results.
IdentifiedResult[] results = new IdentifiedResult[itemIDs.Length];
for (int ii = 0; ii < itemIDs.Length; ii++)
{
results[ii] = new IdentifiedResult(itemIDs[ii]);
results[ii].ResultID = OpcDa.Client.Com.Interop.GetResultID(errors[ii]);
results[ii].DiagnosticInfo = null;
// convert COM code to unified DA code.
if (errors[ii] == ResultIDs.E_BADRIGHTS)
{
results[ii].ResultID = new ResultID(ResultID.Da.E_WRITEONLY, ResultIDs.E_BADRIGHTS);
}
}
// return results.
return(results);
}
catch (Exception e)
{
throw OpcDa.Client.Com.Interop.CreateException("IOPCAsyncIO2.Read", e);
}
}
private IdentifiedResult[] BeginWrite(
ItemIdentifier[] itemIDs,
ItemValue[] items,
int requestID,
out int cancelID)
{
cancelID = 0;
ArrayList validItems = new ArrayList();
ArrayList validValues = new ArrayList();
// construct initial result list.
IdentifiedResult[] results = new IdentifiedResult[itemIDs.Length];
for (int ii = 0; ii < itemIDs.Length; ii++)
{
results[ii] = new IdentifiedResult(itemIDs[ii]);
results[ii].ResultID = ResultID.S_OK;
results[ii].DiagnosticInfo = null;
if (items[ii].QualitySpecified || items[ii].TimestampSpecified)
{
results[ii].ResultID = ResultID.Da.E_NO_WRITEQT;
results[ii].DiagnosticInfo = null;
continue;
}
validItems.Add(results[ii]);
validValues.Add(OpcDa.Client.Com.Interop.GetVARIANT(items[ii].Value));
}
// check if any valid items exist.
if (validItems.Count == 0)
{
return(results);
}
try
{
// initialize input parameters.
int[] serverHandles = new int[validItems.Count];
for (int ii = 0; ii < validItems.Count; ii++)
{
serverHandles[ii] = (int)((IdentifiedResult)validItems[ii]).ServerHandle;
}
// write to sever.
IntPtr pErrors = IntPtr.Zero;
((IOPCAsyncIO2)m_group).Write(
validItems.Count,
serverHandles,
(object[])validValues.ToArray(typeof(object)),
requestID,
out cancelID,
out pErrors);
// unmarshal results.
int[] errors = OpcDa.Client.Com.Interop.GetInt32s(ref pErrors, validItems.Count, true);
// create result list.
for (int ii = 0; ii < validItems.Count; ii++)
{
IdentifiedResult result = (IdentifiedResult)validItems[ii];
result.ResultID = OpcDa.Client.Com.Interop.GetResultID(errors[ii]);
result.DiagnosticInfo = null;
// convert COM code to unified DA code.
if (errors[ii] == ResultIDs.E_BADRIGHTS)
{
results[ii].ResultID = new ResultID(ResultID.Da.E_READONLY, ResultIDs.E_BADRIGHTS);
}
}
}
catch (Exception e)
{
throw OpcDa.Client.Com.Interop.CreateException("IOPCAsyncIO2.Write", e);
}
// return results.
return(results);
}
public IdentifiedResult[] RemoveItems(object[] itemClientHandles)
{
if (itemClientHandles == null)
{
throw new ArgumentNullException("items");
}
// check if nothing to do.
if (itemClientHandles.Length == 0)
{
return(new IdentifiedResult[0]);
}
lock (this)
{
if (this.m_group == null)
{
// MessageBox.Show("No connection!");
return(new IdentifiedResult[0]);
}
// get item ids.
ItemIdentifier[] itemIDs = null;
lock (m_items)
{
itemIDs = m_items.GetItemIDs(itemClientHandles);
}
// fetch server handles.
int count = itemClientHandles.Length;
int[] serverHandles = new int[count];
for (int ii = 0; ii < count; ii++)
{
serverHandles[ii] = (int)itemIDs[ii].ServerHandle;
}
// initialize output parameters.
IntPtr pErrors = IntPtr.Zero;
try
{
((IOPCItemMgt)this.m_group).RemoveItems(count, serverHandles, out pErrors);
}
catch (Exception e)
{
throw OpcDa.Client.Com.Interop.CreateException("IOPCItemMgt.RemoveItems", e);
}
// unmarshal output parameters.
int[] errors = OpcDa.Client.Com.Interop.GetInt32s(ref pErrors, count, true);
// process results.
IdentifiedResult[] results = new IdentifiedResult[count];
lock (m_items)
{
for (int ii = 0; ii < count; ii++)
{
results[ii] = new IdentifiedResult(itemIDs[ii]);
results[ii].ResultID = OpcDa.Client.Com.Interop.GetResultID(errors[ii]);
results[ii].DiagnosticInfo = null;
// flag item for removal from local list.
if (results[ii].ResultID.Succeeded())
{
m_items[results[ii].ClientHandle.GetHashCode()] = null;
}
}
}
return(results);
}
}
// handles asynchronous write complete events.
public void OnWriteComplete(
int dwTransid,
int hGroup,
int hrMastererror,
int dwCount,
int[] phClientItems,
int[] pErrors)
{
try
{
OpcRequest request = null;
IdentifiedResult[] results = null;
lock (this)
{
// do nothing if no outstanding requests.
request = (OpcRequest)m_requests[dwTransid];
if (request == null)
{
return;
}
// remove the request.
m_requests.Remove(dwTransid);
// contruct the item results.
results = new IdentifiedResult[dwCount];
for (int ii = 0; ii < results.Length; ii++)
{
// lookup the external client handle.
ItemIdentifier itemID = (ItemIdentifier)m_group.Items[phClientItems[ii]];
results[ii] = new IdentifiedResult(itemID);
results[ii].ClientHandle = phClientItems[ii];
results[ii].ResultID = OpcDa.Client.Com.Interop.GetResultID(pErrors[ii]);
results[ii].DiagnosticInfo = null;
// convert COM code to unified DA code.
if (pErrors[ii] == ResultIDs.E_BADRIGHTS)
{
results[ii].ResultID = new ResultID(ResultID.Da.E_READONLY, ResultIDs.E_BADRIGHTS);
}
}
// apply request options.
lock (m_group.Items)
{
m_group.Items.ApplyFilters(m_filters | (int)ResultFilter.ClientHandle, results);
}
}
// end the request.
lock (request)
{
request.EndRequest(results);
}
}
catch (Exception e)
{
string stack = e.StackTrace;
}
}