protected void OnBuildingIndex(BuildingIndexCsvFeatureSourceEventArgs e)
{
EventHandler <BuildingIndexCsvFeatureSourceEventArgs> handler = BuildingIndex;
if (handler != null)
{
handler(null, e);
}
}
protected virtual void BuildIndexFileCore(bool rebuild)
{
string idxPathFileName = Path.ChangeExtension(CsvPathFileName, ".idx");
string idsPathFileName = Path.ChangeExtension(CsvPathFileName, ".ids");
if (!File.Exists(idxPathFileName) && !File.Exists(idsPathFileName) || rebuild)
{
if (!string.IsNullOrEmpty(WktColumnName))
{
RtreeSpatialIndex.CreateRectangleSpatialIndex(idxPathFileName, RtreeSpatialIndexPageSize.EightKilobytes, RtreeSpatialIndexDataFormat.Float);
}
else
{
RtreeSpatialIndex.CreatePointSpatialIndex(idxPathFileName, RtreeSpatialIndexPageSize.EightKilobytes, RtreeSpatialIndexDataFormat.Float);
}
using (RtreeSpatialIndex tempRTree = new RtreeSpatialIndex(idxPathFileName, GeoFileReadWriteMode.ReadWrite))
{
tempRTree.Open();
bool isCanceled = false;
DateTime startDate = DateTime.Now;
using (var csvReader = CreateCsvReader())
{
var allRecords = csvReader.DataRecords.ToArray();
int index = 0;
foreach (var currentDataRecord in allRecords)
{
index++;
var feature = GetFeature(index.ToString(), currentDataRecord);
if (feature != null)
{
tempRTree.Add(feature);
BuildingIndexCsvFeatureSourceEventArgs e = new BuildingIndexCsvFeatureSourceEventArgs(allRecords.Length, index, feature, startDate, false);
OnBuildingIndex(e);
if (e.Cancel)
{
isCanceled = true;
break;
}
}
}
}
if (!isCanceled)
{
tempRTree.Flush();
}
else
{
if (File.Exists(idxPathFileName))
{
File.Delete(idxPathFileName);
}
if (File.Exists(idsPathFileName))
{
File.Delete(idsPathFileName);
}
}
}
}
}
