public static string ToGeoJson(this Esri.FileGDB.Row row)
{
try
{
StringBuilder sb = new StringBuilder("{ \"type\": \"Feature\", ");
var geom = row.GetGeometry();
sb.Append("\"geometry\": ");
sb.Append(geom.ToGeoJson());
sb.Append(", ");
sb.Append(processFields(row));
sb.Append("}");
return sb.ToString();
}
catch (Exception ex)
{
throw new Exception("Error processing row", ex);
}
}
private static string processFields(Esri.FileGDB.Row row)
{
try
{
StringBuilder sb = new StringBuilder("\"properties\": {");
List<string> props = new List<string>();
string proptemplate = "\"{0}\": \"{1}\"";
for (int fldnum = 0; fldnum < row.FieldInformation.Count; fldnum++)
{
string fldname = row.FieldInformation.GetFieldName(fldnum);
string fldval = "";
if (row.IsNull(fldname))
{
fldval = "null";
}
else
{
switch (row.FieldInformation.GetFieldType(fldnum))
{
case FieldType.Geometry:
fldval = "geometry";
break;
case FieldType.Blob:
fldval = "blob";
break;
case FieldType.SmallInteger:
fldval = row.GetShort(fldname).ToString();
break;
case FieldType.Integer:
fldval = row.GetInteger(fldname).ToString();
break;
case FieldType.Single:
fldval = row.GetFloat(fldname).ToString();
break;
case FieldType.Double:
fldval = row.GetDouble(fldname).ToString();
break;
case FieldType.String:
fldval = row.GetString(fldname);
break;
case FieldType.Date:
fldval = row.GetDate(fldname).ToLongTimeString();
break;
case FieldType.OID:
fldval = row.GetOID().ToString();
break;
case FieldType.GUID:
fldval = row.GetGUID(fldname).ToString();
break;
case FieldType.GlobalID:
fldval = row.GetGlobalID().ToString();
break;
default:
break;
}
}
string propval = string.Format(proptemplate, fldname, fldval);
props.Add(propval);
}
var proparray = props.ToArray();
string propsjoin = string.Join(",", proparray);
sb.Append(propsjoin);
sb.Append("}");
return sb.ToString();
}
catch (Exception ex)
{
throw new Exception("Error processing attributes", ex);
}
}