public async Task <Dictionary <string, IEnumerable <OpisenseOpcItemProperty> > > BrowseAllItems(CancellationToken cancellationToken,
string opcServerUrl,
Action <string> onError = null)
{
OpisenseOpcItemProperty ConvertProperty(ItemProperty property)
{
return(new OpisenseOpcItemProperty
{
PropertyName = property.ID.Name.Name,
Description = property.Description,
DataType = property.DataType,
Value = property.Value,
ItemName = property.ItemName,
ItemPath = property.ItemPath,
ResultId = property.ResultID,
DiagnosticInfo = property.DiagnosticInfo
});
}
var exisitingTags = await OpcDaClientConnector.WithNewInstance().BrowseAllItems(cancellationToken, opcServerUrl, exception => ThrowOrReport(exception, onError));
var result = exisitingTags.ToDictionary(
keySelector => keySelector.Key,
valueSelector => valueSelector.Value.Select(ConvertProperty));
return(result);
}
public async Task <IEnumerable <OpisenseOpcItemValue> > ReadGroup(CancellationToken cancellationToken, string opcServerUrl, OpisenseOpcItemGroup opcItemGroup, Action <IEnumerable <string> > onError = null, bool discardBadValues = true)
{
var opisenseOpcItemsList = opcItemGroup.OpisenseOpcItems.ToList();
var readResult = new List <OpisenseOpcItemValue>(opisenseOpcItemsList.Count);
var errors = new List <string>();
void HandleItemValue(ItemValue itemValue)
{
//There is a bug in the library, ClientHandle is not propagated with item results
//if (!int.TryParse(itemValue.ClientHandle.ToString(), out int variableId))
{
}
try
{
var variableIds = opisenseOpcItemsList.Where(i => i.OpcItemName.Equals(itemValue.ItemName, StringComparison.InvariantCultureIgnoreCase)).Select(i => i.VariableId);
readResult.AddRange(variableIds.Select(variableId => new OpisenseOpcItemValue
{
TimeStampUtc = new DateTime(itemValue.Timestamp.Ticks, DateTimeKind.Local).ToUniversalTime(),
OpcItemName = itemValue.ItemName,
VariableId = variableId,
Value = ResultAsDouble(itemValue),
GoodQuality = itemValue.Quality == Quality.Good
}));
}
catch (Exception ex)
{
var message = $"Exception handling item '{itemValue.ItemName}' with value '{itemValue.Value}': {ex.Message}";
errors.Add(message);
}
}
await OpcDaClientConnector
.WithNewInstance()
.ReadItems(cancellationToken, opcServerUrl, opisenseOpcItemsList,
goodValue =>
{
HandleItemValue(goodValue);
return(Task.FromResult(0));
},
badValue =>
{
if (!discardBadValues)
{
HandleItemValue(badValue);
}
return(Task.FromResult(0));
},
exception => errors.Add(exception.Message));
if (errors.Any())
{
if (onError is null)
{
Logger.Error($"Exception reading items from OPC server {opcServerUrl}: {string.Join(", ", errors)}");
}
else
{
onError(errors);
}
}
return(readResult);
}