SQL CE 3.5 problem with TableDirect table access - asp.net

Question

I try to insert hundreds of records into empty database table using TableDirect type of SqlCeCommand. The problem is I get an exception SqlCeException "Unspecified error" when calling SqlCeResultSet::Insert. Below is my code. Any hints?
Thanks
public bool StoreEventsDB2(List<DAO.Event> events)
{
try
{
SqlCeCommand command = new SqlCeCommand("Event");
command.CommandType = System.Data.CommandType.TableDirect;
SqlCeResultSet rs = _databaseManager.ExecuteResultSet(command, ResultSetOptions.Updatable | ResultSetOptions.Scrollable );
foreach (DAO.Event theEvent in events)
{
SqlCeUpdatableRecord record = rs.CreateRecord();
record.SetInt32( 0, theEvent.ID );
record.SetInt32( 1, theEvent.ParentID);
record.SetString(2, theEvent.Name);
record.SetDateTime(3, theEvent.DateTime);
record.SetDateTime(4, theEvent.LastSynced);
record.SetInt32(5, theEvent.LastSyncedTS);
record.SetString(6, theEvent.VenueName);
record.SetBoolean(7, theEvent.IsParentEvent);
record.SetDateTime(11, DateTime.Now);
rs.Insert(record);
}
}
catch (SqlCeException e)
{
Log.Logger.GetLogger().Log(Log.Logger.LogLevel.ERROR, "[EventManager::StoreEventsDB] error: {0}", e.Message);
return false;
}
catch (Exception e)
{
Log.Logger.GetLogger().Log(Log.Logger.LogLevel.ERROR, "[EventManager::StoreEventsDB] error: {0}", e.Message);
return false;
}
return true;
}

Answer 1

I am unsure how your connection is managed with the database manager which could be the culprit - make sure you are using one connection (sqlce doesn't play nice). Also the results set option "ResultSetOption.Scrollable" is not needed (at least I have never used it for an insert).
Below is the syntax I use when doing direct table inserts. Every database/data access object is wrapped in a using statement to dispose of objects after use - this is very important especially with the compact framework and sqlce as the garbage collection is less than ideal (you WILL get out of memory exceptions!). I have added a transaction to your code also so that the option is all or nothing.
Hope this helps:
using (var transaction = connection.BeginTransaction())
{
using (var command = connection.CreateCommand())
{
command.Transaction = transaction;
command.CommandType = CommandType.TableDirect;
command.CommandText = "Event";
using (var rs = command.ExecuteResultSet(ResultSetOptions.Updatable))
{
var record = rs.CreateRecord();
foreach (DAO.Event theEvent in events)
{
record.SetInt32(0, theEvent.ID);
record.SetInt32(1, theEvent.ParentID);
record.SetString(2, theEvent.Name);
record.SetDateTime(3, theEvent.DateTime);
record.SetDateTime(4, theEvent.LastSynced);
record.SetInt32(5, theEvent.LastSyncedTS);
record.SetString(6, theEvent.VenueName);
record.SetBoolean(7, theEvent.IsParentEvent);
record.SetDateTime(11, DateTime.Now);
rs.Insert(record);
}
}
transaction.Commit();
}
}