private static object GetValueForField(string attributeName, IFields fields, IRasterIdentifyObj2 row)
{
var fieldCount = fields.FieldCount;
string value = null;
var i = 0;
try
{
while (i <= fieldCount)
{
string property;
row.GetPropAndValues(i, out property, out value);
if (string.Equals(property, attributeName, StringComparison.InvariantCultureIgnoreCase))
{
return(value);
}
if (attributeName == "VALUE" && property.ToUpperInvariant() == "PIXEL VALUE")
{
return(value);
}
i = i + 1;
}
}
catch (COMException)
{
// NoData pixel found
value = null;
}
return(value);
}
private static ValueList GetPixelData(IMap map, IEnvelope extent, HashSet <string> includeFields)
{
ValueList result = new ValueList();
for (int i = 0; i < map.LayerCount; i += 1)
{
ILayer layer = map.get_Layer(i);
if (!layer.Visible)
{
continue;
}
IIdentify id = layer as IIdentify;
if (id == null)
{
continue;
}
IArray data = id.Identify(extent);
if (data != null)
{
for (int j = 0; j < data.Count; j += 1)
{
object foundObj = data.get_Element(j);
IRasterIdentifyObj2 raster = foundObj as IRasterIdentifyObj2;
IRowIdentifyObject row = foundObj as IRowIdentifyObject;
if (raster != null)
{
int propertyIndex = 0;
string property;
string value;
while (true)
{
try {
raster.GetPropAndValues(propertyIndex, out property, out value);
if ((!"NoData".Equals(value)) &&
((includeFields == null) || includeFields.Contains(property)))
{
result.Add(property, value);
}
propertyIndex += 1;
} catch {
break;
}
}
continue;
}
else if (row != null)
{
IFields fields = row.Row.Fields;
for (int k = 0; k < fields.FieldCount; k += 1)
{
string fieldName = fields.get_Field(k).Name;
if ((includeFields == null) ? (!result.ContainsKey(fieldName)) : includeFields.Contains(fieldName))
{
result.Add(fieldName, row.Row.get_Value(k));
}
}
}
}
break;
}
}
return(result);
}
