/// <summary>
/// Updates a data filter.
/// </summary>
/// <param name="server">The server object</param>
/// <param name="filterValue">The value of the filter</param>
public void UpdateDataFilter(TsCDaServer server, string filterValue)
{
// not a valid operation for non data filter items.
if (_unfilteredItemID == null)
{
throw new OpcResultException(new OpcResult((int)OpcResult.Cpx.E_FILTER_ERROR.Code, OpcResult.FuncCallType.SysFuncCall, null), "Cannot update the data filter for this item.");
}
// create the value to write.
TsCDaItemValue item = new TsCDaItemValue(this)
{
Value = filterValue, Quality = TsCDaQuality.Bad, QualitySpecified = false, Timestamp = DateTime.MinValue, TimestampSpecified = false
};
// write the value.
OpcItemResult[] result = server.Write(new TsCDaItemValue[] { item });
if (result == null || result.Length == 0)
{
throw new OpcResultException(new OpcResult((int)OpcResult.E_FAIL.Code, OpcResult.FuncCallType.SysFuncCall, null), "Unexpected results returned from server.");
}
if (result[0].Result.Failed())
{
throw new OpcResultException(new OpcResult((int)OpcResult.Cpx.E_FILTER_ERROR.Code, OpcResult.FuncCallType.SysFuncCall, null), "Could not update data filter.");
}
// update locale copy of the filter value.
DataFilterValue = filterValue;
}
/// <summary>
/// Creates a new data filter.
/// </summary>
/// <param name="server">The server object</param>
/// <param name="filterName">The name of the filter</param>
/// <param name="filterValue">The value of the filter</param>
public TsCCpxComplexItem CreateDataFilter(TsCDaServer server, string filterName, string filterValue)
{
// not a valid operation for data filter items.
if (_unfilteredItemID != null)
{
return(null);
}
// data filters not supported by the item.
if (_filterItem == null)
{
return(null);
}
TsCDaBrowsePosition position = null;
try
{
// write the desired filter to the server.
TsCDaItemValue item = new TsCDaItemValue(_filterItem);
// create the filter parameters document.
using (StringWriter ostrm = new StringWriter())
{
using (XmlTextWriter writer = new XmlTextWriter(ostrm))
{
writer.WriteStartElement("DataFilters");
writer.WriteAttributeString("Name", filterName);
writer.WriteString(filterValue);
writer.WriteEndElement();
writer.Close();
}
// create the value to write.
item.Value = ostrm.ToString();
}
item.Quality = TsCDaQuality.Bad;
item.QualitySpecified = false;
item.Timestamp = DateTime.MinValue;
item.TimestampSpecified = false;
// write the value.
OpcItemResult[] result = server.Write(new TsCDaItemValue[] { item });
if (result == null || result.Length == 0)
{
throw new OpcResultException(new OpcResult((int)OpcResult.E_FAIL.Code, OpcResult.FuncCallType.SysFuncCall, null), "Unexpected results returned from server.");
}
if (result[0].Result.Failed())
{
throw new OpcResultException(new OpcResult((int)OpcResult.Cpx.E_FILTER_ERROR.Code, OpcResult.FuncCallType.SysFuncCall, null), "Could not create new data filter.");
}
// browse for new data filter item.
TsCDaBrowseFilters filters = new TsCDaBrowseFilters {
ElementNameFilter = filterName, BrowseFilter = TsCDaBrowseFilter.Item, ReturnAllProperties = false, PropertyIDs = CPX_PROPERTIES, ReturnPropertyValues = true
};
TsCDaBrowseElement[] elements = server.Browse(_filterItem, filters, out position);
// nothing found.
if (elements == null || elements.Length == 0)
{
throw new OpcResultException(new OpcResult((int)OpcResult.Cpx.E_FILTER_ERROR.Code, OpcResult.FuncCallType.SysFuncCall, null), "Could not browse to new data filter.");
}
TsCCpxComplexItem filterItem = new TsCCpxComplexItem();
if (!filterItem.Init(elements[0]))
{
throw new OpcResultException(new OpcResult((int)OpcResult.Cpx.E_FILTER_ERROR.Code, OpcResult.FuncCallType.SysFuncCall, null), "Could not initialize to new data filter.");
}
// return the new data filter.
return(filterItem);
}
finally
{
if (position != null)
{
position.Dispose();
position = null;
}
}
}
/// <summary>
/// Executes a write request for the current set if items.
/// </summary>
public void DoWrite()
{
try
{
// get the selected items
TsCDaItemValue[] items = ItemsCTRL.GetItems();
// write to server.
OpcItemResult[] 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 (TsCDaItemValue 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++)
{
TsCDaItemValueResult value = new TsCDaItemValueResult(items[ii]);
value.ItemName = results[ii].ItemName;
value.ItemPath = results[ii].ItemPath;
value.ClientHandle = results[ii].ClientHandle;
value.ServerHandle = results[ii].ServerHandle;
value.Result = results[ii].Result;
value.DiagnosticInfo = results[ii].DiagnosticInfo;
values.Add(value);
}
// save results.
m_values = (TsCDaItemValueResult[])values.ToArray(typeof(TsCDaItemValueResult));
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);
}
}