Problem removing object from collection (RESOLVED)

[Genie]

I have a SortedList called m_FieldMappings.

All objects in it that are marked 'Delete', i want to remove from the SortedList.

foreach (FieldMapping map in m_FieldMappings.GetValueList())
{
if (map.DBState == enDBAction.Delete) m_FieldMappings.Remove(map.key);
}

The problem seems to be that since I am doing a foreach, the collection should not change otherwise you get an enumeration error.

I'm looking for another way of doing this.

[CornedBee]

Use the enumerator directly. Use two enumerators, one to point to the value that gets deleted, another to point at the next value to continue enumeration.

[Genie]

Thats great CornedBee. Heres' what I wrote and works great.

Seems a good general solution.


IDictionaryEnumerator en = m_FieldMappings.GetEnumerator();
en.Reset();

if (en.MoveNext())
{
while (true)
{
//en.Current; -- don't need since en.Value points to current object
FieldMapping map = (FieldMapping) en.Value;
if (map.DBState == enDBAction.Delete)
{
m_FieldMappings.Remove(map.key);
// re-create the enumerator, since it will have been invalidated.
en = m_FieldMappings.GetEnumerator();
en.Reset();
}

if (!en.MoveNext())
{
break;
}
}
}