public override object Lookup(int column, string keyNames, object[] keyValues)
{
lock (LookupDataViews) //Make sure no 2 threads try to use LookupDataViews at the same time.
{
TLookupCache LookupDV;
if (!LookupDataViews.TryGetValue(keyNames, out LookupDV))
{
if (LookupDataViews.Count > 10)
{
LookupDataViews.Clear(); //Avoid too many indexes.
}
LookupDV = new TLookupCache(new DataView(Data, String.Empty, keyNames, DataViewRowState.CurrentRows));
LookupDataViews.Add(keyNames, LookupDV);
}
if (LookupDV.EqualKeys(keyValues))
{
return(LookupDV.LastRow.Row[column]);
}
int row = LookupDV.dv.Find(keyValues);
if (row < 0)
{
return(null);
}
LookupDV.LastRow = LookupDV.dv[row];
LookupDV.LastKeyValues = keyValues;
return(LookupDV.LastRow.Row[column]);
}
}