private void mergeFeatureTables(FeatureDataTable source, FeatureDataTable target)
{
Boolean isTargetEmpty = target.Rows.Count == 0;
if (source.Rows.Count > 0)
{
Object primaryKeyIndex = null;
Object srcLookupKey = createEmptyDataKey();
target.SuspendIndexEvents();
try
{
if (!isTargetEmpty && (target.PrimaryKeyConstraint != null))
{
srcLookupKey = getSourceKeyOrTargetKeyForSource(source, target);
if (getDataKeyHasValue(srcLookupKey))
{
Object rowLookupKey = getDataKeyFromUniqueConstraint(target.PrimaryKeyConstraint);
const DataViewRowState rowState = DataViewRowState.OriginalRows |
DataViewRowState.Added;
primaryKeyIndex = getDataKeySortIndex(rowLookupKey, rowState);
}
}
foreach (FeatureDataRow sourceRow in source.Rows)
{
FeatureDataRow targetRow = null;
if (primaryKeyIndex != null)
{
targetRow = target.FindMergeTarget(sourceRow,
srcLookupKey,
primaryKeyIndex);
}
//mergeFeature(target, sourceRow, targetRow, PreserveChanges);
FeatureDataRow mergedRow = target.MergeRowInternal(sourceRow,
targetRow,
PreserveChanges,
primaryKeyIndex);
// If we are adding the geometry to the row or if the geometry changed
// then we set it here.
if (mergedRow.Geometry == null ||
mergedRow.Geometry.EqualsExact(sourceRow.Geometry))
{
mergedRow.Geometry = sourceRow.Geometry;
}
mergedRow.IsFullyLoaded = mergedRow.IsFullyLoaded || sourceRow.IsFullyLoaded;
}
}
finally
{
target.RestoreIndexEvents(true);
}
}
mergeExtendedProperties(source.ExtendedProperties,
target.ExtendedProperties,
SchemaMergeAction,
PreserveChanges);
}