public void ReadPropertyValues(ref OPCTag tag)
{
// count 必须比 propIds.Length 少一个
int count = 4;
List <int> propIds = new List <int>();
propIds.Add(0);
propIds.Add(1);
propIds.Add(2);
propIds.Add(3);
propIds.Add(4);
Array PropertyIDs = propIds.ToArray();
Array PropertyValues;
Array Errors;
try{
mServer.GetItemProperties(tag.Name, count, ref PropertyIDs, out PropertyValues, out Errors);
if ((count == 0) || (count > 10000))
{
return;
}
for (int i = 1; i <= count; i++)
{
if (i == 1)
{
VarEnum dataType = (VarEnum)VarEnum.ToObject(typeof(VarEnum), PropertyValues.GetValue(i));
//tag.DataType = dataType;
//var text = dataType.ToString();
// these methods are clunkier but run 25% faster on my machine
var text2 = Enum.GetName(typeof(VarEnum), dataType);
//var text3 = typeof(VarEnum).GetEnumName(dataType);
tag.DataTypeText = text2;
}
else if (i == 2)
{
tag.SetValue(this, PropertyValues.GetValue(i));
}
else if (i == 3)
{
tag.Quality = (OPCQuality)PropertyValues.GetValue(i);
}
else if (i == 4)
{
tag.ItemTimeStamp = (DateTime)PropertyValues.GetValue(i);
}
break;
}
} catch (Exception ex)
{
}
}
void OnGroupDataChange(int TransactionID, int NumItems, ref Array ClientHandles, ref Array ItemValues, ref Array Qualities, ref Array TimeStamps)
{
try {
Console.WriteLine("in OPCClient, OnGroupDataChange, Thread id is: " + System.Threading.Thread.CurrentThread.ManagedThreadId);
for (int i = 1; i <= NumItems; i++)
{
int handle = (int)ClientHandles.GetValue(i);
if (mTagsByClientHandle.ContainsKey(handle))
{
OPCTag tag = mTagsByClientHandle[handle];
tag.SetValue(this, ItemValues.GetValue(i));
tag.ItemTimeStamp = (DateTime)TimeStamps.GetValue(i);
tag.Quality = (OPCQuality)Qualities.GetValue(i);
tag.UpdateCount++;
}
}
} catch (Exception ex) {
}
}