private string GetDisplayField(FeatureClass featureClass)
{
string displayField = "";
Map map = MapView.Active.Map;
if (map == null)
{
return(displayField);
}
//Get flattened layers from Map. If the feature class exists in the map, get that feature Layer and its display field. If not, return null.
var layer = map.GetLayersAsFlattenedList().OfType <FeatureLayer>().FirstOrDefault(lyr => lyr.GetFeatureClass().GetName() == featureClass.GetName());
if (layer == null)
{
return("");
}
CIMFeatureLayer currentCIMFeatureLayer = layer.GetDefinition() as CIMFeatureLayer;
CIMFeatureTable cimFeatureTable = currentCIMFeatureLayer.FeatureTable;
displayField = cimFeatureTable.DisplayField;
return(displayField);
}
// Set range for feature layer
// Map Exploration Team Routine
private Task SetRangeProperties(FeatureLayer ftrLyr, string fieldName, bool hasCustomRange = false, double customMin = 0, double customMax = 1, bool inSingleValueMode = false, int rangeStepCount = 0)
{
return(QueuedTask.Run(() =>
{
//Get min/max values for the field
double minValue = 0;
double maxValue = 0;
//Calculate min/max if custom range is not defined
if (!hasCustomRange)
{
int ftrCount = 0;
RowCursor rows = ftrLyr.Search(null);
while (rows.MoveNext())
{
ftrCount++;
}
double[] fieldVals = new double[ftrCount];
rows = ftrLyr.Search(null);
//Looping through to count
int i = 0;
while (rows.MoveNext())
{
using (var currentRow = rows.Current)
{
object origVal = currentRow.GetOriginalValue(rows.FindField(fieldName));
if (!(origVal is DBNull))
{
fieldVals[i] = System.Convert.ToDouble(origVal);
}
i++;
}
}
if (fieldVals.Count() > 0)
{
minValue = fieldVals.Min();
maxValue = fieldVals.Max();
}
}
else
{
minValue = customMin;
maxValue = customMax;
}
CIMBasicFeatureLayer baseLyr = (CIMBasicFeatureLayer)ftrLyr.GetDefinition();
CIMFeatureTable ftrTable = baseLyr.FeatureTable;
//CIMRange theRange = new CIMRange();
CIMRangeDefinition[] rangeDefn = new CIMRangeDefinition[1];
rangeDefn[0] = new CIMRangeDefinition();
rangeDefn[0].FieldName = fieldName;
rangeDefn[0].Name = fieldName;
rangeDefn[0].CustomFullExtent = new CIMRange();
rangeDefn[0].CustomFullExtent.Min = minValue;
rangeDefn[0].CustomFullExtent.Max = maxValue;
//Set current range with either step count == 1 OR for some cases with step count == 0
rangeDefn[0].CurrentRange = new CIMRange();
rangeDefn[0].CurrentRange.Min = minValue;
//rangeDefn[0].CurrentRange.Max = (rangeStepCount == 1) ? minValue + 1 : minValue;
//set range step to 0 if in single value mode and to rangeStepCount otherwise
rangeDefn[0].CurrentRange.Max = (inSingleValueMode) ? minValue : minValue + rangeStepCount;
//rangeDefn[0].CurrentRange.Max = maxValue;
ftrTable.RangeDefinitions = rangeDefn;
ftrTable.ActiveRangeName = fieldName;
baseLyr.FeatureTable = ftrTable;
ftrLyr.SetDefinition(baseLyr);
}));
}