private List <ShapefileRecord> GetAllMainRecords(Stream stream)
{
List <ShapefileRecord> records = new List <ShapefileRecord>();
byte[] streamBuffer;
try
{
stream.Position = 100;
do
{
streamBuffer = ReadBytesFromStream(stream, 8);
if (streamBuffer.Length < 8)
{
break;
}
else
{
ShapefileRecord myRecord = new ShapefileRecord(streamBuffer);
myRecord.RecordContents = ReadBytesFromStream(stream, myRecord.ContentLength * 2);
records.Add(myRecord);
}
} while (streamBuffer.Length > 0);
}
catch
{
//Clear the list so it is returned empty.
records.Clear();
}
return(records);
}
public static ShapefileConverter Create <T>(IEnumerable <T> items,
Func <T, DbGeometry> geoFunc,
Func <T, string> nameFunc)
where T : class
{
var converter = new ShapefileConverter();
foreach (var item in items)
{
var rec = new ShapefileRecord();
var points = new List <Point>();
var geometry = geoFunc(item);
Debug.Assert(geometry.PointCount != null, "geometry.PointCount != null");
// Points are 1 based in DbGeometry
var pointCount = geometry.PointCount;
for (var pointIndex = 1; pointIndex <= pointCount; pointIndex++)
{
var point = geometry.PointAt(pointIndex);
Debug.Assert(point.XCoordinate != null, "point.XCoordinate != null");
Debug.Assert(point.YCoordinate != null, "point.YCoordinate != null");
points.Add(new Point(point.XCoordinate.Value, point.YCoordinate.Value));
}
rec.Fields = new ShapefileRecordFields {
{ "Name", nameFunc(item) }
};
rec.Points = new List <List <Point> > {
points
};
converter.Add(rec);
}
return(converter);
}
/// <summary>
/// Checks if <see cref="ShapefileRecord"/> contains a key in its field keys loaded from database (.dbf) file
/// </summary>
public static bool ContainsKey(this ShapefileRecord record, string fieldKey)
{
foreach (ShapefileRecordFields field in record.Fields)
{
if (field.ContainsKey(fieldKey))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Gets value that corresponds to specified key in <see cref="ShapefileRecord"/>
/// </summary>
/// <remarks>
/// <para>Warning: Throws InvalidCastException if type of field value is incompatible with provided type</para>
/// <code>Usage: ShapefileRecord.GetValue<DATA_TYPE>("DATA_COLUMN");</code>
/// </remarks>
public static T GetValue <T>(this ShapefileRecord record, string fieldKey)
{
return(record.Fields.GetValue <T>(fieldKey));
}
