static bool TagIsReady(string tagName)
{
bool returnValue = false;
try
{
// Check to see if we already konw the tag is ready
returnValue = _HistorianTags.subscribetags.Single(s => s.historianTag.TagName.Equals(tagName)).tagisready;
//We have not registered that the tag is ready so go check again
if (!returnValue)
{
HistorianTagStatus tagStatus = new HistorianTagStatus();
tagStatus.TagName = tagName;
_historian.GetTagStatusByName(ref tagStatus);
returnValue = !(tagStatus.Pending | tagStatus.ErrorOccurred);
//If it comes back ready then stick that back into the object for cacheing
if (returnValue)
{
_HistorianTags.subscribetags.Single(s => s.historianTag.TagName.Equals(tagName)).tagisready = returnValue;
}
}
}
catch (Exception ex)
{
log.Error(ex);
returnValue = false;
}
return(returnValue);
}
