protected override void OnPrepareItemAdded(object row)
{
// Get new values for which delta information is needed
IManualTotalSummaryArraySource tsa = this.TopLevelGroup as IManualTotalSummaryArraySource;
if (tsa != null)
{
TableDescriptor td = TableDescriptor;
foreach (string name in this.totalSummaries)
{
FieldDescriptor fd = td.Fields[name];
if (fd.IsPropertyField())
{
PropertyDescriptor pd = fd.GetPropertyDescriptor();
object value = GetValue(row, pd);
ChangedFieldInfo ci = new ChangedFieldInfo(td, pd.Name, null, value);
this.AddChangedField(ci);
}
}
}
base.OnPrepareItemAdded(row);
}
public void ApplyDelta(Element r, bool isObsoleteRecord, bool isAddedRecord, ChangedFieldInfo ci)
{
if (Dirty)
{
return;
}
ManualTotalSummary mt = this;
if (isObsoleteRecord)
{
if (ci.OldValue != null && !(ci.OldValue is DBNull))
{
mt.Total -= Convert.ToDouble(ci.OldValue);
}
}
else if (isAddedRecord)
{
if (ci.NewValue != null && !(ci.NewValue is DBNull))
{
mt.Total += Convert.ToDouble(ci.NewValue);
}
}
else
{
mt.Total += ci.Delta;
}
}
protected override void OnPrepareRemoving(object row)
{
// Save values for all fields where we need to be able to access the
// old value (e.g. Delta for TotalSummaries).
TableDescriptor td = TableDescriptor;
IManualTotalSummaryArraySource tsa = this.TopLevelGroup as IManualTotalSummaryArraySource;
if (tsa != null)
{
foreach (string name in this.totalSummaries)
{
FieldDescriptor fd = td.Fields[name];
if (fd.IsPropertyField())
{
PropertyDescriptor pd = fd.GetPropertyDescriptor();
object value = GetValue(row, pd);
ChangedFieldInfo ci = new ChangedFieldInfo(td, pd.Name, value, null);
this.AddChangedField(ci);
}
}
}
base.OnPrepareRemoving(row);
}
