/// <summary>
/// Returns an ShapefileDataReader representing the data in a shapefile.
/// </summary>
/// <param name="filename">The filename (minus the . and extension) to read.</param>
/// <param name="geometryFactory">The geometry factory to use when creating the objects.</param>
/// <returns>An ShapefileDataReader representing the data in the shape file.</returns>
public static ShapefileReader CreateDataReader(string filename, GeometryFactory geometryFactory)
{
if (filename == null)
throw new ArgumentNullException("filename");
if (geometryFactory == null)
throw new ArgumentNullException("geometryFactory");
ShapefileReader shpDataReader= new ShapefileReader(filename,geometryFactory);
return shpDataReader;
}
/// <summary>
/// Creates a DataTable representing the information in a shape file.
/// </summary>
/// <param name="filename">The filename (minus the . and extension) to read.</param>
/// <param name="tableName">The name to give to the Table.</param>
/// <param name="geometryFactory">The geometry factory to use when creating the objects.</param>
/// <returns>DataTable representing the data </returns>
public static DataTable CreateDataTable(string filename, string tableName, GeometryFactory geometryFactory)
{
if (filename == null)
throw new ArgumentNullException("filename");
if (tableName == null)
throw new ArgumentNullException("tableName");
if (geometryFactory == null)
throw new ArgumentNullException("geometryFactory");
ShapefileReader shpfileDataReader= new ShapefileReader(filename, geometryFactory);
DataTable table = new DataTable(tableName);
// use ICustomTypeDescriptor to get the properies/ fields. This way we can get the
// length of the dbase char fields. Because the dbase char field is translated into a string
// property, we lost the length of the field. We need to know the length of the
// field when creating the Table in the database.
IEnumerator enumerator = shpfileDataReader.GetEnumerator();
bool moreRecords = enumerator.MoveNext();
ICustomTypeDescriptor typeDescriptor = (ICustomTypeDescriptor)enumerator.Current;
foreach(PropertyDescriptor property in typeDescriptor.GetProperties())
{
ColumnStructure column = (ColumnStructure)property;
Type fieldType = column.PropertyType;
DataColumn datacolumn = new DataColumn(column.Name, fieldType);
if (fieldType== typeof(string))
// use MaxLength to pass the length of the field in the dbase file
datacolumn.MaxLength=column.Length;
table.Columns.Add( datacolumn );
}
// add the rows - need a do-while loop because we read one row in order to determine the fields
int iRecordCount=0;
object[] values = new object[shpfileDataReader.FieldCount];
do
{
iRecordCount++;
shpfileDataReader.GetValues(values);
table.Rows.Add(values);
moreRecords = enumerator.MoveNext();
}
while (moreRecords);
return table;
}
/// <summary>
///
/// </summary>
/// <param name="parent"></param>
public ShapefileDataReaderEnumerator(ShapefileReader parent)
{
_parent = parent;
}