public GroupEnumerator(GroupByEnumerator g)
{
this.g = g;
this.en = g.en;
this.field = g.field;
this.groupValue = xbind.Resolve(en.Current, field);
}
public override bool MoveNext()
{
if (!base.MoveNext())
{
return(false);
}
if (last == first)
{
last = ctx.Resolve(base.Current, propertyName);
return(true);
}
object old = last;
bool next = true;
do
{
last = ctx.Resolve(base.Current, propertyName);
} while (IsEqualToLast(old) && (next = base.MoveNext()));
return(next);
}
public decimal Sum(IEnumerable en, string propertyName)
{
decimal sum = 0;
var xb = new XBindContext();
foreach (object obj in en)
{
object val = xb.Resolve(obj, propertyName);
if (val != null)
{
sum += Convert.ToDecimal(val);
}
}
return(sum);
}