/// <summary>
/// Returns the value of the specified field.
/// </summary>
private object GetFieldValue(OpcItemResult item, int fieldID)
{
switch (fieldID)
{
case ITEM_NAME: { return(item.ItemName); }
case ITEM_PATH: { return(item.ItemPath); }
// case CLIENT_HANDLE: { return OpcClientSdk.Utilities.Convert.ToString(item.ClientHandle); }
// case SERVER_HANDLE: { return OpcClientSdk.Utilities.Convert.ToString(item.ServerHandle); }
case ERROR: { return(GetErrorText(item.Result)); }
}
return(null);
}
/// <summary>
/// Returns the value of the specified field.
/// </summary>
private object GetFieldValue(OpcItemResult item, int fieldId)
{
switch (fieldId)
{
case ItemName: { return(item.ItemName); }
case ItemPath: { return(item.ItemPath); }
// case CLIENT_HANDLE: { return Technosoftware.DaAeHdaClient.Utilities.Convert.ToString(item.ClientHandle); }
// case SERVER_HANDLE: { return Technosoftware.DaAeHdaClient.Utilities.Convert.ToString(item.ServerHandle); }
case Error: { return(GetErrorText(item.Result)); }
}
return(null);
}
/// <summary>
/// Begins an asynchronous write for a set of items using DA2.0 interfaces.
/// </summary>
protected override OpcItemResult[] BeginWrite(
OpcItem[] itemIDs,
TsCDaItemValue[] items,
int requestID,
out int cancelID)
{
cancelID = 0;
ArrayList validItems = new ArrayList();
ArrayList validValues = new ArrayList();
// construct initial result list.
OpcItemResult[] results = new OpcItemResult[itemIDs.Length];
for (int ii = 0; ii < itemIDs.Length; ii++)
{
results[ii] = new OpcItemResult(itemIDs[ii]);
results[ii].Result = OpcResult.S_OK;
results[ii].DiagnosticInfo = null;
if (items[ii].QualitySpecified || items[ii].TimestampSpecified)
{
results[ii].Result = OpcResult.Da.E_NO_WRITEQT;
results[ii].DiagnosticInfo = null;
continue;
}
validItems.Add(results[ii]);
validValues.Add(Utilities.Interop.GetVARIANT(items[ii].Value));
}
// check if any valid items exist.
if (validItems.Count == 0)
{
return(results);
}
string methodName = "IOPCAsyncIO2.Write";
try
{
// initialize input parameters.
int[] serverHandles = new int[validItems.Count];
for (int ii = 0; ii < validItems.Count; ii++)
{
serverHandles[ii] = (int)((OpcItemResult)validItems[ii]).ServerHandle;
}
// write to sever.
IntPtr pErrors = IntPtr.Zero;
IOPCAsyncIO2 subscription = BeginComCall <IOPCAsyncIO2>(methodName, true);
subscription.Write(
validItems.Count,
serverHandles,
(object[])validValues.ToArray(typeof(object)),
requestID,
out cancelID,
out pErrors);
// unmarshal results.
int[] errors = Utilities.Interop.GetInt32s(ref pErrors, validItems.Count, true);
// create result list.
for (int ii = 0; ii < validItems.Count; ii++)
{
OpcItemResult result = (OpcItemResult)validItems[ii];
result.Result = Utilities.Interop.GetResultId(errors[ii]);
result.DiagnosticInfo = null;
// convert COM code to unified DA code.
if (errors[ii] == Result.E_BADRIGHTS)
{
results[ii].Result = new OpcResult(OpcResult.Da.E_READONLY, Result.E_BADRIGHTS);
}
}
}
catch (Exception e)
{
ComCallError(methodName, e);
throw Utilities.Interop.CreateException(methodName, e);
}
finally
{
EndComCall(methodName);
}
// return results.
return(results);
}
/// <summary>
/// Begins an asynchronous read of a set of items using DA2.0 interfaces.
/// </summary>
protected override OpcItemResult[] BeginRead(
OpcItem[] itemIDs,
TsCDaItem[] items,
int requestID,
out int cancelID)
{
string methodName = "IOPCAsyncIO2.Read";
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 subscription = BeginComCall <IOPCAsyncIO2>(methodName, true);
subscription.Read(
itemIDs.Length,
serverHandles,
requestID,
out cancelID,
out pErrors);
// unmarshal output parameters.
int[] errors = Utilities.Interop.GetInt32s(ref pErrors, itemIDs.Length, true);
// create item results.
OpcItemResult[] results = new OpcItemResult[itemIDs.Length];
for (int ii = 0; ii < itemIDs.Length; ii++)
{
results[ii] = new OpcItemResult(itemIDs[ii]);
results[ii].Result = Utilities.Interop.GetResultId(errors[ii]);
results[ii].DiagnosticInfo = null;
// convert COM code to unified DA code.
if (errors[ii] == Result.E_BADRIGHTS)
{
results[ii].Result = new OpcResult(OpcResult.Da.E_WRITEONLY, Result.E_BADRIGHTS);
}
}
// return results.
return(results);
}
catch (Exception e)
{
ComCallError(methodName, e);
throw Utilities.Interop.CreateException(methodName, e);
}
finally
{
EndComCall(methodName);
}
}
/// <summary>
/// Writes a set of items using DA2.0 interfaces.
/// </summary>
protected override OpcItemResult[] Write(OpcItem[] itemIDs, TsCDaItemValue[] items)
{
// create result list.
OpcItemResult[] results = new OpcItemResult[itemIDs.Length];
// construct list of valid items to write.
ArrayList writeItems = new ArrayList(itemIDs.Length);
ArrayList writeValues = new ArrayList(itemIDs.Length);
for (int ii = 0; ii < items.Length; ii++)
{
results[ii] = new OpcItemResult(itemIDs[ii]);
if (items[ii].QualitySpecified || items[ii].TimestampSpecified)
{
results[ii].Result = OpcResult.Da.E_NO_WRITEQT;
results[ii].DiagnosticInfo = null;
continue;
}
writeItems.Add(results[ii]);
writeValues.Add(items[ii]);
}
// check if there is nothing to do.
if (writeItems.Count == 0)
{
return(results);
}
// initialize input parameters.
int[] serverHandles = new int[writeItems.Count];
object[] values = new object[writeItems.Count];
for (int ii = 0; ii < serverHandles.Length; ii++)
{
serverHandles[ii] = (int)((OpcItemResult)writeItems[ii]).ServerHandle;
values[ii] = Utilities.Interop.GetVARIANT(((TsCDaItemValue)writeValues[ii]).Value);
}
IntPtr pErrors = IntPtr.Zero;
// write item values.
string methodName = "IOPCSyncIO.Write";
try
{
IOPCSyncIO subscription = BeginComCall <IOPCSyncIO>(methodName, true);
subscription.Write(
writeItems.Count,
serverHandles,
values,
out pErrors);
}
catch (Exception e)
{
ComCallError(methodName, e);
throw Utilities.Interop.CreateException(methodName, e);
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
int[] errors = Utilities.Interop.GetInt32s(ref pErrors, writeItems.Count, true);
for (int ii = 0; ii < writeItems.Count; ii++)
{
OpcItemResult result = (OpcItemResult)writeItems[ii];
result.Result = Utilities.Interop.GetResultId(errors[ii]);
result.DiagnosticInfo = null;
// convert COM code to unified DA code.
if (errors[ii] == Result.E_BADRIGHTS)
{
results[ii].Result = new OpcResult(OpcResult.Da.E_READONLY, Result.E_BADRIGHTS);
}
}
// return results.
return(results);
}
/// <summary>
/// Writes the value, quality and timestamp for a set of items.
/// </summary>
/// <param name="items">The set of item values to write.</param>
/// <returns>The results of the write operation for each item.</returns>
public virtual OpcItemResult[] Write(TsCDaItemValue[] items)
{
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
lock (this)
{
if (m_server == null)
{
throw new NotConnectedException();
}
string methodName = "IOPCItemIO.WriteVQT";
int count = items.Length;
if (count == 0)
{
throw new ArgumentOutOfRangeException("items.Length", "0");
}
// initialize arguments.
string[] itemIDs = new string[count];
for (int ii = 0; ii < count; ii++)
{
itemIDs[ii] = items[ii].ItemName;
}
OpcRcw.Da.OPCITEMVQT[] values = Technosoftware.DaAeHdaClient.Com.Da.Interop.GetOPCITEMVQTs(items);
IntPtr pErrors = IntPtr.Zero;
// invoke COM method.
try
{
IOPCItemIO server = BeginComCall <IOPCItemIO>(methodName, true);
server.WriteVQT(
count,
itemIDs,
values,
out pErrors);
}
catch (Exception e)
{
ComCallError(methodName, e);
throw Technosoftware.DaAeHdaClient.Com.Interop.CreateException(methodName, e);
}
finally
{
EndComCall(methodName);
}
// unmarshal results.
int[] errors = Technosoftware.DaAeHdaClient.Utilities.Interop.GetInt32s(ref pErrors, count, true);
// construct result array.
OpcItemResult[] results = new OpcItemResult[count];
for (int ii = 0; ii < count; ii++)
{
results[ii] = new OpcItemResult(items[ii]);
results[ii].ServerHandle = null;
results[ii].Result = Technosoftware.DaAeHdaClient.Utilities.Interop.GetResultID(errors[ii]);
results[ii].DiagnosticInfo = null;
// convert COM code to unified DA code.
if (errors[ii] == Result.E_BADRIGHTS)
{
results[ii].Result = new OpcResult(OpcResult.Da.E_READONLY, Result.E_BADRIGHTS);
}
// apply request options.
if ((filters_ & (int)TsCDaResultFilter.ItemName) == 0)
{
results[ii].ItemName = null;
}
if ((filters_ & (int)TsCDaResultFilter.ItemPath) == 0)
{
results[ii].ItemPath = null;
}
if ((filters_ & (int)TsCDaResultFilter.ClientHandle) == 0)
{
results[ii].ClientHandle = null;
}
}
// return results.
return(results);
}
}
