async private void btnOK_Click(object sender, EventArgs e)
{
if (_dataset != null &&
_dataset.ConnectionString != _dsConnectionString)
{
await _dataset.SetConnectionString(_dsConnectionString);
await _dataset.Open();
int dsIndex = 0;
IDataset ds;
while ((ds = _map[dsIndex]) != null)
{
if (ds == _dataset)
{
break;
}
dsIndex++;
}
if (ds == null)
{
return;
}
foreach (IDatasetElement element in _map.MapElements)
{
if (!(element is DatasetElement))
{
continue;
}
if (element.DatasetID == dsIndex)
{
IDatasetElement el = await _dataset.Element(element.Title);
if (el == null)
{
((DatasetElement)element).Class2 = null;
}
else
{
((DatasetElement)element).Class2 = el.Class;
}
}
}
}
}
async public Task <IFeature> GetNodeFeatureAttributes(int nodeId, string[] attributes)
{
try
{
QueryFilter filter = new QueryFilter();
filter.WhereClause = "FDB_OID=" + nodeId;
filter.AddField("FCID");
filter.AddField("OID");
IFeature feature;
using (IFeatureCursor cursor = await GetNodeFeatures(filter))
feature = await cursor.NextFeature();
if (feature == null)
{
return(null);
}
string fcName = await _fdb.GetFeatureClassName((int)feature["FCID"]);
IDatasetElement element = await _dataset.Element(fcName);
if (element == null)
{
return(null);
}
IFeatureClass fc = element.Class as IFeatureClass;
if (fc == null)
{
return(null);
}
filter = new QueryFilter();
if (fc is IDatabaseNames)
{
filter.WhereClause = ((IDatabaseNames)fc).DbColName(fc.IDFieldName) + "=" + Convert.ToInt32(feature["OID"]);
}
else
{
filter.WhereClause = _fdb.DbColName(fc.IDFieldName) + "=" + Convert.ToInt32(feature["OID"]);
}
if (attributes == null)
{
filter.AddField("*");
}
else
{
foreach (string attribute in attributes)
{
if (attribute == "*")
{
filter.AddField(attribute);
}
else if (fc.FindField(attribute) != null)
{
filter.AddField(attribute);
}
}
}
using (IFeatureCursor cursor = await fc.GetFeatures(filter))
feature = await cursor.NextFeature();
if (feature != null)
{
feature.Fields.Add(new FieldValue("_classname", fc.Name));
}
return(feature);
}
catch
{
return(null);
}
}