public object GetValue(string tag)
{
DataQueryParams query = new CurrentValueQuery(tag);
ItemErrors errors;
Proficy.Historian.ClientAccess.API.DataSet dataset = null;
Connection.IData.Query(ref query, out dataset, out errors);
if (dataset.TotalSamples > 0)
{
return(dataset[tag].GetValue(0));
}
else
{
return("");
}
}
public Dictionary <string, object> GetValues(params string[] tags)
{
if (tags == null || tags.Length == 0)
{
return(new Dictionary <string, object>());
}
DataQueryParams query = new CurrentValueQuery(tags);
ItemErrors errors;
Proficy.Historian.ClientAccess.API.DataSet dataset = null;
Connection.IData.Query(ref query, out dataset, out errors);
Dictionary <string, object> values = new Dictionary <string, object>();
foreach (var item in dataset)
{
if (item.Value.Count() > 0)
{
values.Add(item.Key, item.Value.GetValue(0));
}
}
foreach (string key in tags)
{
if (dataset.ContainsKey(key))
{
values[key] = dataset[key].GetValue(0);
}
else
{
values[key] = "";
}
}
return(values);
}
public object QueryCurrentValue(params string[] tags)
{
ItemErrors errors;
Proficy.Historian.ClientAccess.API.DataSet set = new Proficy.Historian.ClientAccess.API.DataSet();
DataQueryParams query = new CurrentValueQuery(tags) { Fields = DataFields.Time | DataFields.Value | DataFields.Quality };
CurrentValue cv= new CurrentValue();
sc.IData.Query(ref query, out set, out errors);
return set;
}
