private void InitRecords(IFilter filter)
{
DataViewRowState states = recordStates;
// SQLBU 428961: Serious performance issue when creating DataView
// this improves performance when the is no filter, like with the default view (creating after rows added)
// we know the records are in the correct order, just append to end, duplicates not possible
bool append = (0 == IndexFields.Length);
records = new IndexTree(this);
recordCount = 0;
// SQLBU 428961: Serious performance issue when creating DataView
// this improves performance by iterating of the index instead of computing record by index
foreach (DataRow b in table.Rows)
{
int record = -1;
if (b.oldRecord == b.newRecord)
{
if ((int)(states & DataViewRowState.Unchanged) != 0)
{
record = b.oldRecord;
}
}
else if (b.oldRecord == -1)
{
if ((int)(states & DataViewRowState.Added) != 0)
{
record = b.newRecord;
}
}
else if (b.newRecord == -1)
{
if ((int)(states & DataViewRowState.Deleted) != 0)
{
record = b.oldRecord;
}
}
else
{
if ((int)(states & DataViewRowState.ModifiedCurrent) != 0)
{
record = b.newRecord;
}
else if ((int)(states & DataViewRowState.ModifiedOriginal) != 0)
{
record = b.oldRecord;
}
}
if (record != -1 && AcceptRecord(record, filter))
{
records.InsertAt(-1, record, append);
recordCount++;
}
}
}
private void InitRecords(IFilter filter)
{
DataViewRowState recordStates = this.recordStates;
bool append = 0 == this.IndexFields.Length;
this.records = new IndexTree(this);
this.recordCount = 0;
foreach (DataRow row in this.table.Rows)
{
int record = -1;
if (row.oldRecord == row.newRecord)
{
if ((recordStates & DataViewRowState.Unchanged) != DataViewRowState.None)
{
record = row.oldRecord;
}
}
else if (row.oldRecord == -1)
{
if ((recordStates & DataViewRowState.Added) != DataViewRowState.None)
{
record = row.newRecord;
}
}
else if (row.newRecord == -1)
{
if ((recordStates & DataViewRowState.Deleted) != DataViewRowState.None)
{
record = row.oldRecord;
}
}
else if ((recordStates & DataViewRowState.ModifiedCurrent) != DataViewRowState.None)
{
record = row.newRecord;
}
else if ((recordStates & DataViewRowState.ModifiedOriginal) != DataViewRowState.None)
{
record = row.oldRecord;
}
if ((record != -1) && this.AcceptRecord(record, filter))
{
this.records.InsertAt(-1, record, append);
this.recordCount++;
}
}
}
